The following is a list ofUnited States representatives from thecommonwealth ofPennsylvania. For chronological tables of members of both houses of theUnited States Congress from the state (through the present day), seeUnited States congressional delegations from Pennsylvania. The list has been updated periodically to reflect changes in membership; current entries are for members of the119th Congress.
Listed below are the incumbent members of the Pennsylvania House Delegation to the119th Congress, updated on January 3, 2025:
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| Member | Party | District | Years | Electoral history |
|---|---|---|---|---|
| Ernest F. Acheson | Republican | 24th | March 4, 1895 – March 4, 1909 | Lost re-election. |
| Ephraim L. Acker | Democratic | 6th | March 4, 1871 – March 4, 1873 | Lost re-election. |
| Robert Adams Jr. | Republican | 2nd | December 19, 1893 – June 1, 1906 | Died. |
| William Addams | Jacksonian | 7th | March 4, 1825 – March 4, 1829 | Lost re-election. |
| John A. Ahl | Democratic | 16th | March 4, 1857 – March 4, 1859 | Retired. |
| William D. B. Ainey | Republican | 14th | November 7, 1911 – March 4, 1915 | Retired. |
| Charles Albright | Republican | At-large | March 4, 1873 – March 4, 1875 | Retired. |
| Robert G. Allen | Democratic | 28th | January 3, 1937 – January 3, 1941 | Retired. |
| James Allison Jr. | Democratic-Republican | 16th | March 4, 1823 – August 26, 1825 | Resigned. |
| John Allison | Whig | 20th | March 4, 1851 – March 4, 1853 | Lost re-election. |
| Opposition | 23rd | March 4, 1855 – March 4, 1857 | Retired. | |
| Robert Allison | Anti-Masonic | 12th | March 4, 1831 – March 4, 1833 | Retired. |
| Jason Altmire | Democratic | 4th | January 3, 2007 – January 3, 2013 | Redistricted and lost renomination. |
| Lemuel Amerman | Democratic | 11th | March 4, 1891 – March 4, 1893 | Lost re-election. |
| Joseph S. Ammerman | Democratic | 23rd | January 3, 1977 – January 3, 1979 | Lost re-election. |
| Sydenham E. Ancona | Democratic | 8th | March 4, 1861 – March 4, 1867 | Lost re-election. |
| Isaac Anderson | Democratic-Republican | 3rd | March 4, 1803 – March 4, 1807 | Retired. |
| Samuel Anderson | Anti-Jacksonian | 4th | March 4, 1827 – March 4, 1829 | Retired and returned to Pennsylvania House of Representatives. |
| William Anderson | Democratic-Republican | 1st | March 4, 1809 – March 4, 1815 | |
| March 4, 1817 – March 4, 1819 | ||||
| Joseph B. Anthony | Jacksonian | 16th | March 4, 1833 – March 4, 1837 | |
| James Armstrong | Pro-Administration | At-large | March 4, 1793 – March 4, 1795 | Retired. |
| William H. Armstrong | Republican | 18th | March 4, 1869 – March 4, 1871 | Lost re-election. |
| William C. Arnold | Republican | 28th | March 4, 1895 – March 4, 1899 | Lost re-election. |
| Michael W. Ash | Jacksonian | 3rd | March 4, 1835 – March 4, 1837 | Retired. |
| Eugene Atkinson | Democratic | 25th | January 3, 1979 – October 14, 1981 | Switched parties. |
| Republican | October 14, 1981 – January 3, 1983 | Redistricted and lost re-election. | ||
| Louis E. Atkinson | Republican | 18th | March 4, 1883 – March 4, 1893 | Withdrew from re-election campaign and retired. |
| Elijah Babbitt | Republican | 25th | March 4, 1859 – March 4, 1863 | Retired. |
| Reuben K. Bachman | Democratic | 10th | March 4, 1879 – March 4, 1881 | Retired. |
| Donald A. Bailey | Democratic | 21st | January 3, 1979 – January 3, 1983 | Redistricted and lost renomination. |
| Joseph Bailey | Democratic | 16th | March 4, 1861 – March 4, 1863 | |
| 15th | March 4, 1863 – March 4, 1865 | |||
| Warren W. Bailey | Democratic | 19th | March 4, 1913 – March 4, 1917 | |
| Henry Baldwin | Democratic-Republican | 14th | March 4, 1817 – May 8, 1822 | Resigned. |
| John Banks | Anti-Masonic | 18th | March 4, 1831 – March 4, 1833 | Resigned to become the judge of the Berks judicial district. |
| 24th | March 4, 1833 – March 31, 1836 | |||
| Laird H. Barber | Democratic | 8th | March 4, 1899 – March 4, 1901 | |
| Andrew J. Barchfeld | Republican | 32nd | March 4, 1905 – March 4, 1917 | |
| Charles F. Barclay | Republican | 21st | March 4, 1907 – March 4, 1911 | |
| David Barclay | Democratic | 24th | March 4, 1855 – March 4, 1857 | |
| David Bard | Democratic-Republican | 10th | March 4, 1795 – March 4, 1799 | |
| 4th | March 4, 1803 – March 4, 1813 | |||
| 9th | March 4, 1813 – March 12, 1815 | |||
| Abraham A. Barker | Republican | 17th | March 4, 1865 – March 4, 1867 | |
| Lou Barletta | Republican | 11th | January 3, 2011 – January 3, 2019 | Retired. |
| Stephen Barlow | Jacksonian | 18th | March 4, 1827 – March 4, 1829 | |
| Charles Augustus Barnitz | Anti-Masonic | 11th | March 4, 1833 – March 4, 1835 | |
| Samuel F. Barr | Republican | 14th | March 4, 1881 – March 4, 1885 | |
| William A. Barrett | Democratic | 1st | January 3, 1945 – January 3, 1947 | |
| January 3, 1949 – April 12, 1976 | Died. | |||
| Arthur L. Bates | Republican | 26th | March 4, 1901 – March 4, 1903 | |
| 25th | March 4, 1903 – March 4, 1913 | |||
| Thomas M. Bayne | Republican | 23rd | March 4, 1877 – March 4, 1891 | |
| Joseph G. Beale | Republican | 27th | March 4, 1907 – March 4, 1909 | |
| C. William Beales | Republican | 20th | March 4, 1915 – March 4, 1917 | |
| William Beatty | Democratic | 23rd | March 4, 1837 – March 4, 1841 | |
| Andrew Beaumont | Jacksonian | 15th | March 4, 1833 – March 4, 1837 | |
| James M. Beck | Republican | 1st | November 8, 1927 – March 4, 1933 | |
| 2nd | March 4, 1933 – September 30, 1934 | |||
| Edward M. Beers | Republican | 18th | March 4, 1923 – April 21, 1932 | Died. |
| Henry W. Beeson | Democratic | 20th | May 31, 1841 – March 4, 1843 | |
| Frank E. Beltzhoover | Democratic | 19th | March 4, 1879 – March 4, 1883 | |
| March 4, 1891 – March 4, 1895 | ||||
| George J. Benner | Democratic | 19th | March 4, 1897 – March 4, 1899 | |
| William M. Berlin | Democratic | 28th | March 4, 1933 – January 3, 1937 | |
| Earl H. Beshlin | Democratic | 28th | November 6, 1917 – March 4, 1919 | |
| Thomas M. Bibighaus | Whig | 14th | March 4, 1851 – March 4, 1853 | |
| Charles J. Biddle | Democratic | 2nd | July 2, 1861 – March 4, 1863 | |
| Joseph F. Biddle | Republican | 18th | November 8, 1932 – March 4, 1933 | |
| Richard Biddle | Anti-Masonic | 22nd | March 4, 1837 – July 21, 1840 | Resigned. |
| Benjamin A. Bidlack | Democratic | 15th | March 4, 1841 – March 4, 1843 | |
| 11th | March 4, 1843 – March 4, 1845 | |||
| James S. Biery | Republican | 6th | March 4, 1873 – March 4, 1875 | |
| Edward G. Biester Jr. | Republican | 8th | January 3, 1967 – January 3, 1977 | |
| Alexander Billmeyer | Democratic | 17th | November 4, 1902 – March 4, 1903 | |
| Henry H. Bingham | Republican | 1st | March 4, 1879 – March 22, 1912 | Died. |
| Horace Binney | Anti-Jacksonian | 2nd | March 4, 1833 – March 4, 1835 | |
| Harris J. Bixler | Republican | 28th | March 4, 1921 – March 4, 1927 | |
| Henry Black | Whig | 18th | June 28, 1841 – November 28, 1841 | Died. |
| James Black | Jacksonian | 13th | December 5, 1836 – March 4, 1837 | |
| Democratic | 16th | March 4, 1843 – March 4, 1847 | ||
| Lucien E. Blackwell | Democratic | 2nd | November 5, 1991 – January 3, 1995 | |
| Samuel S. Blair | Republican | 18th | March 4, 1859 – March 4, 1863 | |
| John Blanchard | Whig | 17th | March 4, 1845 – March 4, 1849 | |
| Andrew Boden | Democratic-Republican | 5th | March 4, 1817 – March 4, 1821 | |
| Patrick J. Boland | Democratic | 11th | March 4, 1931 – May 18, 1942 | Died. |
| Veronica G. Boland | Democratic | 11th | November 3, 1942 – January 3, 1943 | |
| Edward J. Bonin | Republican | 11th | January 3, 1953 – January 3, 1955 | |
| Robert A. Borski Jr. | Democratic | 3rd | January 3, 1983 – January 3, 2003 | |
| Thomas Boude | Federalist | 7th | March 4, 1801 – March 4, 1803 | |
| Franklin Bound | Republican | 14th | March 4, 1885 – March 4, 1889 | |
| Charles C. Bowman | Republican | 11th | March 4, 1911 – December 12, 1912 | Seat declared vacant. |
| Benjamin M. Boyer | Democratic | 6th | March 4, 1865 – March 4, 1869 | |
| Brendan F. Boyle | Democratic | 13th | January 3, 2015 – January 3, 2019 | Redistricted. |
| 2nd | January 3, 2019 – present | Incumbent | ||
| Charles E. Boyle | Democratic | 21st | March 4, 1883 – March 4, 1887 | |
| Henry M. Brackenridge | Whig | 22nd | October 13, 1840 – March 4, 1841 | |
| Michael J. Bradley | Democratic | 3rd | January 3, 1937 – January 3, 1947 | |
| Samuel C. Bradshaw | Opposition | 7th | March 4, 1855 – March 4, 1857 | |
| Robert A. Brady | Democratic | 1st | May 19, 1998 – January 3, 2019 | Retired. |
| Jasper E. Brady | Whig | 16th | March 4, 1847 – March 4, 1849 | |
| Samuel M. Brainerd | Republican | 27th | March 4, 1883 – March 4, 1885 | |
| Samuel Breck | Federalist | 1st | March 4, 1823 – March 4, 1825 | |
| Rob Bresnahan | Republican | 8th | January 3, 2025 – present | Incumbent |
| Samuel A. Bridges | Democratic | 6th | March 6, 1848 – March 4, 1849 | |
| 7th | March 4, 1853 – March 4, 1855 | |||
| 10th | March 4, 1877 – March 4, 1879 | |||
| John Brisbin | Democratic | 11th | January 13, 1851 – March 4, 1851 | |
| Andrew R. Brodbeck | Democratic | 20th | March 4, 1913 – March 4, 1915 | |
| March 4, 1917 – March 4, 1919 | ||||
| J. Davis Brodhead | Democratic | 26th | March 4, 1907 – March 4, 1909 | |
| Richard Brodhead | Democratic | 10th | March 4, 1843 – March 4, 1849 | |
| Edward S. Brooks | Republican | 20th | March 4, 1919 – March 4, 1923 | |
| J. Twing Brooks | Democratic | 30th | March 4, 1933 – January 3, 1937 | |
| Jacob Broom | Know Nothing | 4th | March 4, 1855 – March 4, 1857 | |
| John M. Broomall | Republican | 7th | March 4, 1863 – March 4, 1869 | |
| Marriott Brosius | Republican | 10th | March 4, 1889 – March 16, 1901 | Died. |
| Charles Brown | Democratic | 1st | March 4, 1841 – March 4, 1843 | |
| 3rd | March 4, 1847 – March 4, 1849 | |||
| James W. Brown | Independent Republican | 32nd | March 4, 1903 – March 4, 1905 | |
| Jeremiah Brown | Whig | 4th | March 4, 1841 – March 4, 1843 | |
| 8th | March 4, 1843 – March 4, 1845 | |||
| John Brown | Democratic-Republican | 9th | March 4, 1821 – March 4, 1823 | |
| 12th | March 4, 1823 – March 4, 1825 | |||
| Robert Brown | Democratic-Republican | 4th | December 4, 1798 – March 4, 1803 | |
| 2nd | March 4, 1803 – March 4, 1813 | |||
| 6th | March 4, 1813 – March 4, 1815 | |||
| William W. Brown | Republican | 16th | March 4, 1883 – March 4, 1887 | |
| D. Emmert Brumbaugh | Republican | 23rd | November 2, 1943 – January 3, 1945 | |
| 22nd | January 3, 1945 – January 3, 1947 | |||
| Charles N. Brumm | Greenback | 13th | March 4, 1881 – March 4, 1885 | |
| Republican | March 4, 1885 – March 4, 1889 | |||
| March 4, 1895 – March 4, 1899 | ||||
| 12th | November 6, 1906 – January 4, 1909 | Resigned after being elected judge of the court of common pleas ofSchuylkill County, Pennsylvania. | ||
| George F. Brumm | Republican | 13th | March 4, 1923 – March 4, 1927 | |
| March 4, 1929 – May 29, 1934 | Died. | |||
| David B. Brunner | Democratic | 9th | March 4, 1889 – March 4, 1893 | |
| Andrew Buchanan | Jacksonian | 20th | March 4, 1835 – March 4, 1837 | |
| Democratic | March 4, 1837 – March 4, 1839 | |||
| Frank Buchanan | Democratic | 33rd | May 21, 1946 – April 27, 1951 | Died. |
| James Buchanan | Federalist | 3rd | March 4, 1821 – March 4, 1823 | |
| 4th | March 4, 1823 – March 4, 1825 | |||
| Jacksonian | March 4, 1825 – March 4, 1831 | |||
| Vera Buchanan | Democratic | 33rd | July 24, 1951 – January 3, 1953 | Died. |
| 30th | January 3, 1953 – November 26, 1955 | |||
| John C. Bucher | Jacksonian | 6th | March 4, 1831 – March 4, 1833 | |
| Charles R. Buckalew | Democratic | 11th | March 4, 1887 – March 4, 1889 | |
| 17th | March 4, 1889 – March 4, 1891 | |||
| Joseph Buffington | Whig | 24th | March 4, 1843 – March 4, 1847 | |
| Frank C. Bunnell | Republican | 13th | December 24, 1872 – March 4, 1873 | |
| 15th | March 4, 1885 – March 4, 1889 | |||
| George Burd | Anti-Jacksonian | 13th | March 4, 1831 – March 4, 1833 | |
| 18th | March 4, 1833 – March 4, 1835 | |||
| Henry Burk | Republican | 3rd | March 4, 1901 – December 5, 1903 | Died. |
| James F. Burke | Republican | 31st | March 4, 1905 – March 4, 1915 | |
| William J. Burke | Republican | At-large | March 4, 1919 – March 4, 1923 | |
| Thomas Burnside | Democratic-Republican | 9th | October 10, 1815 – April ???, 1816 | Resigned to become President Judge of Luzerne District Courts. |
| Alvin Bush | Republican | 15th | January 3, 1951 – January 3, 1953 | |
| 17th | January 3, 1953 – November 5, 1959 | Died. | ||
| Robert G. Bushong | Republican | 14th | March 4, 1927 – March 4, 1929 | |
| Chester P. Butler | Whig | 11th | March 4, 1847 – October 5, 1850 | Died. |
| Thomas S. Butler | Independent Republican | 6th | March 4, 1897 – March 4, 1899 | |
| Republican | March 4, 1899 – March 4, 1903 | |||
| 7th | March 4, 1903 – March 4, 1923 | |||
| 8th | March 4, 1923 – May 26, 1928 | Died. | ||
| James A. Byrne | Democratic | 3rd | January 3, 1953 – January 3, 1973 | |
| John Cadwalader | Democratic | 5th | March 4, 1855 – March 4, 1857 | |
| Henry L. Cake | Republican | 10th | March 4, 1867 – March 4, 1871 | |
| Samuel Calvin | Whig | 17th | March 4, 1849 – March 4, 1851 | |
| Guy E. Campbell | Democratic | 32nd | March 4, 1917 – March 4, 1923 | |
| Republican | 36th | March 4, 1923 – March 4, 1933 | ||
| Howard E. Campbell | Republican | 29th | January 3, 1945 – January 3, 1947 | |
| Jacob M. Campbell | Republican | 17th | March 4, 1877 – March 4, 1879 | |
| March 4, 1881 – March 4, 1887 | ||||
| James H. Campbell | Opposition | 11th | March 4, 1855 – March 4, 1857 | |
| Republican | March 4, 1859 – March 4, 1863 | |||
| John H. Campbell | Know Nothing | 3rd | March 4, 1845 – March 4, 1847 | |
| Christopher Carney | Democratic | 10th | January 3, 2007 – January 3, 2011 | Lost re-election. |
| Edmund N. Carpenter | Republican | 12th | March 4, 1925 – March 4, 1927 | |
| Wooda N. Carr | Democratic | 23rd | March 4, 1913 – March 4, 1915 | |
| Joseph L. Carrigg | Republican | 14th | November 6, 1951 – January 3, 1953 | |
| 10th | January 3, 1953 – January 3, 1959 | |||
| Matt Cartwright | Democratic | 17th | January 3, 2013 – January 3, 2019 | Redistricted. |
| 8th | January 3, 2019 – January 3, 2025 | Lost re-election | ||
| John J. Casey | Democratic | 11th | March 4, 1913 – March 4, 1917 | |
| March 4, 1919 – March 4, 1921 | ||||
| 12th | March 4, 1923 – March 4, 1925 | |||
| March 4, 1927 – May 5, 1929 | Died. | |||
| Joseph Casey | Whig | 13th | March 4, 1849 – March 4, 1851 | |
| Henry B. Cassel | Republican | 10th | November 5, 1901 – March 4, 1903 | |
| 9th | March 4, 1903 – March 4, 1909 | |||
| George A. Castor | Republican | 3rd | February 16, 1904 – February 19, 1906 | Died. |
| Anthony Cavalcante | Democratic | 23rd | January 3, 1949 – January 3, 1951 | |
| John Cessna | Republican | 16th | March 4, 1869 – March 4, 1871 | |
| March 4, 1873 – March 4, 1875 | ||||
| E. Wallace Chadwick | Republican | 7th | January 3, 1947 – January 3, 1949 | |
| George Chambers | Anti-Masonic | 12th | March 4, 1833 – March 4, 1837 | |
| Joseph R. Chandler | Whig | 2nd | March 4, 1849 – March 4, 1855 | |
| Henry Chapman | Democratic | 7th | March 4, 1857 – March 4, 1859 | |
| John Chapman | Federalist | 4th | March 4, 1797 – March 4, 1799 | |
| J. Mitchell Chase | Republican | 23rd | March 4, 1927 – March 4, 1933 | |
| Earl Chudoff | Democratic | 4th | January 3, 1949 – January 5, 1958 | Resigned to become judge of the Philadelphia Court of Common Pleas. |
| Frank M. Clark | Democratic | 25th | January 3, 1955 – December 31, 1974 | |
| Henry A. Clark | Republican | 25th | March 4, 1917 – March 4, 1919 | |
| William Clark | Anti-Masonic | 10th | March 4, 1833 – March 4, 1837 | |
| Joseph Clay | Democratic-Republican | 1st | March 4, 1803 – March 28, 1808 | Resigned. |
| William F. Clinger Jr. | Republican | 23rd | January 3, 1979 – January 3, 1993 | |
| 5th | January 3, 1993 – January 3, 1997 | |||
| George Clymer | Pro-Administration | At-large | March 4, 1789 – March 4, 1791 | |
| Hiester Clymer | Democratic | 8th | March 4, 1873 – March 4, 1881 | |
| Alexander G. Cochran | Democratic | 23rd | March 4, 1875 – March 4, 1877 | |
| Thomas C. Cochran | Republican | 28th | March 4, 1927 – March 4, 1933 | |
| 20th | March 4, 1933 – January 3, 1935 | |||
| James H. Codding | Republican | 15th | November 5, 1895 – March 4, 1899 | |
| Robert L. Coffey | Democratic | 26th | January 3, 1949 – April 20, 1949 | Died. |
| Alexander Hamilton Coffroth | Democratic | 16th | March 4, 1863 – March 4, 1865 | |
| February 19, 1866 – July 18, 1866 | Successfully contested the election of his opponent. | |||
| 17th | March 4, 1879 – March 4, 1881 | |||
| William H. Coleman | Republican | 30th | March 4, 1915 – March 4, 1917 | |
| Francis D. Collins | Democratic | 11th | March 4, 1875 – March 4, 1879 | |
| John Conard | Democratic-Republican | 1st | March 4, 1803 – March 4, 1815 | |
| Charles R. Connell | Republican | 10th | March 4, 1921 – September 26, 1922 | Died. |
| William Connell | Republican | 11th | March 4, 1897 – March 4, 1903 | |
| 10th | February 10, 1904 – March 4, 1905 | |||
| Daniel W. Connolly | Democratic | 12th | March 4, 1883 – March 4, 1885 | |
| James J. Connolly | Republican | 5th | March 4, 1921 – January 3, 1935 | |
| William S. Conover | Republican | 27th | April 25, 1972 – January 3, 1973 | |
| Frederick Conrad | Democratic-Republican | 2nd | March 4, 1803 – March 4, 1807 | |
| Joel Cook | Republican | 2nd | November 5, 1907 – December 15, 1910 | Died. |
| Allen F. Cooper | Republican | 23rd | March 4, 1903 – March 4, 1911 | |
| James Cooper | Whig | 12th | March 4, 1839 – March 4, 1843 | |
| Thomas B. Cooper | Democratic | 7th | March 4, 1861 – April 4, 1862 | |
| Robert J. Corbett | Republican | 30th | January 3, 1939 – January 3, 1941 | |
| January 3, 1945 – January 3, 1953 | ||||
| 29th | January 3, 1953 – January 3, 1963 | |||
| Peter E. Costello | Republican | 5th | March 4, 1915 – March 4, 1921 | |
| Ryan Costello | Republican | 6th | January 3, 2015 – January 3, 2019 | Retired. |
| Clarence D. Coughlin | Republican | 11th | March 4, 1921 – March 4, 1923 | |
| R. Lawrence Coughlin | Republican | 13th | January 3, 1969 – January 3, 1993 | |
| Richard Coulter | Jacksonian | 17th | March 4, 1827 – March 4, 1833 | |
| 19th | March 4, 1833 – March 4, 1835 | |||
| John Covode | Opposition | 19th | March 4, 1855 – March 4, 1857 | |
| Republican | March 4, 1857 – March 4, 1863 | |||
| 21st | March 4, 1867 – March 4, 1869 | |||
| February 9, 1870 – January 11, 1871 | Died. | |||
| William R. Coyle | Republican | 30th | March 4, 1925 – March 4, 1927 | |
| March 4, 1929 – March 4, 1933 | ||||
| James K. Coyne III | Republican | 8th | January 3, 1981 – January 3, 1983 | |
| William J. Coyne | Democratic | 14th | January 3, 1981 – January 3, 2003 | Retired. |
| Thomas S. Crago | Republican | 23rd | March 4, 1911 – March 4, 1913 | |
| At-large | March 4, 1915 – March 4, 1921 | |||
| September 20, 1921 – March 4, 1923 | ||||
| Alexander K. Craig | Democratic | 24th | February 26, 1892 – July 29, 1892 | Died. |
| Samuel A. Craig | Republican | 21st | March 4, 1889 – March 4, 1891 | |
| Nathaniel N. Craley Jr. | Democratic | 19th | January 3, 1965 – January 3, 1967 | |
| Thomas Hartley Crawford | Jacksonian | 11th | March 4, 1829 – March 4, 1833 | |
| William Crawford | Democratic-Republican | 6th | March 4, 1809 – March 4, 1813 | |
| 5th | March 4, 1813 – March 4, 1817 | |||
| John V. Creely | Republican | 2nd | March 4, 1871 – March 4, 1873 | |
| Mark Critz | Democratic | 12th | May 18, 2010 – January 3, 2013 | Lost re-election. |
| William M. Croll | Democratic | 14th | March 4, 1923 – March 4, 1925 | |
| Charles N. Crosby | Democratic | 29th | March 4, 1933 – January 3, 1939 | |
| Edward Crouch | Democratic-Republican | 3rd | October 12, 1813 – March 4, 1815 | |
| William J. Crow | Republican | 23rd | January 3, 1947 – January 3, 1949 | |
| William C. Culbertson | Republican | 26th | March 4, 1889 – March 4, 1891 | |
| Charles V. Culver | Republican | 20th | March 4, 1865 – March 4, 1867 | |
| Herbert W. Cummings | Democratic | 17th | March 4, 1923 – March 4, 1925 | |
| Andrew G. Curtin | Democratic | 20th | March 4, 1881 – March 4, 1887 | |
| Willard S. Curtin | Republican | 8th | January 3, 1957 – January 3, 1967 | |
| Carlton B. Curtis | Democratic | 23rd | March 4, 1851 – March 4, 1853 | |
| 24th | March 4, 1853 – March 4, 1855 | |||
| Republican | 19th | March 4, 1873 – March 4, 1875 | ||
| Paul B. Dague | Republican | 9th | January 3, 1947 – December 30, 1966 | Resigned. |
| Kathy Dahlkemper | Democratic | 3rd | January 3, 2009 – January 3, 2011 | Lost re-election. |
| Thomas H. Dale | Republican | 10th | March 4, 1905 – March 4, 1907 | |
| J. Burrwood Daly | Democratic | 4th | January 3, 1935 – March 12, 1939 | Died. |
| John Dalzell | Republican | 22nd | March 4, 1887 – March 4, 1903 | |
| 30th | March 4, 1903 – March 4, 1913 | |||
| Joel B. Danner | Democratic | 15th | December 2, 1850 – March 4, 1851 | |
| Edward Darlington | Anti-Masonic | 4th | March 4, 1833 – March 4, 1839 | |
| Isaac Darlington | Federalist | 2nd | March 4, 1817 – March 4, 1819 | |
| Smedley Darlington | Republican | 6th | March 4, 1887 – March 4, 1891 | |
| William Darlington | Democratic-Republican | 2nd | March 4, 1815 – March 4, 1817 | |
| March 4, 1819 – March 4, 1823 | ||||
| Cornelius Darragh | Whig | 21st | March 26, 1844 – March 4, 1847 | |
| George P. Darrow | Republican | 6th | March 4, 1915 – March 4, 1923 | |
| 7th | March 4, 1923 – January 3, 1937 | |||
| January 3, 1939 – January 3, 1941 | ||||
| Harry J. Davenport | Democratic | 29th | January 3, 1949 – January 3, 1951 | |
| Samuel A. Davenport | Republican | At-large | March 4, 1897 – March 4, 1901 | |
| Stanley W. Davenport | Democratic | 12th | March 4, 1899 – March 4, 1901 | |
| Edward Davies | Anti-Masonic | 4th | March 4, 1837 – March 4, 1841 | |
| John Davis | Democratic | 6th | March 4, 1839 – March 4, 1841 | |
| Robert L. Davis | Republican | 6th | November 8, 1932 – March 4, 1933 | |
| Roger Davis | Democratic-Republican | 2nd | March 4, 1811 – March 4, 1813 | |
| 3rd | March 4, 1813 – March 4, 1815 | |||
| William M. Davis | Republican | 5th | March 4, 1861 – March 4, 1863 | |
| John L. Dawson | Democratic | 18th | March 4, 1851 – March 4, 1853 | |
| 20th | March 4, 1853 – March 4, 1855 | |||
| 21st | March 4, 1863 – March 4, 1867 | |||
| Madeleine Dean | Democratic | 4th | January 3, 2019 – present | Incumbent |
| Peter J. De Muth | Democratic | 30th | January 3, 1937 – January 3, 1939 | |
| Elias Deemer | Republican | 16th | March 4, 1901 – March 4, 1903 | |
| 15th | March 4, 1903 – March 4, 1907 | |||
| Chris Deluzio | Democratic | 17th | January 3, 2023 – present | Incumbent |
| Charles Denison | Democratic | 12th | March 4, 1863 – June 27, 1867 | Died. |
| George Denison | Democratic-Republican | 10th | March 4, 1819 – March 4, 1823 | |
| Harmar Denny | Anti-Masonic | 16th | December 15, 1829 – March 4, 1833 | |
| 22nd | March 4, 1833 – March 4, 1837 | |||
| Harmar D. Denny Jr. | Republican | 29th | January 3, 1951 – January 3, 1953 | |
| Charlie Dent | Republican | 15th | January 3, 2005 – May 12, 2018 | Resigned. |
| John H. Dent | Democratic | 21st | January 21, 1958 – January 3, 1979 | |
| Franklin L. Dershem | Democratic | 17th | March 4, 1913 – March 4, 1915 | |
| Arthur G. Dewalt | Democratic | 13th | March 4, 1915 – March 4, 1921 | |
| Lewis Dewart | Jacksonian | 9th | March 4, 1831 – March 4, 1833 | |
| William L. Dewart | Democratic | 11th | March 4, 1857 – March 4, 1859 | |
| John Dick | Whig | 25th | March 4, 1853 – March 4, 1855 | |
| Opposition | March 4, 1855 – March 4, 1857 | |||
| Republican | March 4, 1857 – March 4, 1859 | |||
| Samuel B. Dick | Republican | 26th | March 4, 1879 – March 4, 1881 | |
| Charles H. Dickerman | Democratic | 16th | March 4, 1903 – March 4, 1905 | |
| Jesse C. Dickey | Whig | 7th | March 4, 1849 – March 4, 1851 | |
| John Dickey | Whig | 20th | March 4, 1843 – March 4, 1845 | |
| March 4, 1847 – March 4, 1849 | ||||
| Oliver J. Dickey | Republican | 9th | December 7, 1868 – March 4, 1873 | |
| Charles E. Dietrich | Democratic | 15th | January 3, 1935 – January 3, 1937 | |
| Robert E. Difenderfer | Democratic | 8th | March 4, 1911 – March 4, 1915 | |
| Milo M. Dimmick | Democratic | 10th | March 4, 1849 – March 4, 1853 | |
| William H. Dimmick | Democratic | 13th | March 4, 1857 – March 4, 1861 | |
| Davis Dimock Jr. | Democratic | 17th | March 4, 1841 – January 13, 1842 | Died. |
| J. William Ditter | Republican | 17th | March 4, 1933 – November 21, 1943 | Died. |
| Joseph B. Donley | Republican | 24th | March 4, 1869 – March 4, 1871 | |
| Michael Donohoe | Democratic | 5th | March 4, 1911 – March 4, 1915 | |
| Frank J. G. Dorsey | Democratic | 5th | January 3, 1935 – January 3, 1939 | |
| Charles F. Dougherty | Republican | 4th | January 3, 1979 – January 3, 1983 | |
| Isaac H. Doutrich | Democratic | 19th | March 4, 1927 – January 3, 1937 | |
| Michael F. Doyle | Democratic | 18th | January 3, 1995 – January 3, 2003 | Redistricted. |
| 14th | January 3, 2003 – January 3, 2019 | Redistricted. | ||
| 18th | January 3, 2019 – December 31, 2022 | Retired and resigned early. | ||
| Solomon R. Dresser | Republican | 21st | March 4, 1903 – March 4, 1907 | |
| Ira W. Drew | Democratic | 7th | January 3, 1937 – January 3, 1939 | |
| Denis J. Driscoll | Democratic | 20th | January 3, 1935 – January 3, 1937 | |
| Augustus Drum | Democratic | 19th | March 4, 1853 – March 4, 1855 | |
| William A. Duncan | Democratic | 19th | March 4, 1883 – November 14, 1884 | Died. |
| Matthew A. Dunn | Democratic | 34th | March 4, 1933 – January 3, 1941 | |
| Herman P. Eberharter | Democratic | 32nd | January 3, 1937 – January 3, 1943 | Died. |
| 31st | January 3, 1943 – January 3, 1945 | |||
| 32nd | January 3, 1945 – January 3, 1953 | |||
| 28th | January 3, 1953 – September 9, 1958 | |||
| Charles R. Eckert | Democratic | 26th | January 3, 1935 – January 3, 1939 | |
| George N. Eckert | Whig | 14th | March 4, 1847 – March 4, 1849 | |
| Robert W. Edgar | Democratic | 7th | January 3, 1975 – January 3, 1987 | |
| John R Edie | Opposition | 18th | March 4, 1855 – March 4, 1857 | |
| Republican | March 4, 1857 – March 4, 1859 | |||
| George W. Edmonds | Republican | 4th | March 4, 1913 – March 4, 1925 | |
| March 4, 1933 – January 3, 1935 | ||||
| John Edwards | Anti-Masonic | 4th | March 4, 1839 – March 4, 1841 | |
| Whig | March 4, 1841 – March 4, 1843 | |||
| Samuel Edwards | Federalist | 1st | March 4, 1819 – March 4, 1823 | |
| 4th | March 4, 1823 – March 4, 1825 | |||
| Jacksonian | March 4, 1825 – March 4, 1827 | |||
| Albert G. Egbert | Democratic | 27th | March 4, 1875 – March 4, 1877 | |
| George Ege | Federalist | 5th | December 8, 1796 – October ???, 1797 | Resigned. |
| Joshua Eilberg | Democratic | 4th | January 3, 1967 – January 3, 1979 | |
| Henry Ellenbogen | Democratic | 33rd | March 4, 1933 – January 3, 1938 | Resigned to become a judge of common pleas for Allegheny County, PA |
| Douglas H. Elliott | Republican | 18th | April 26, 1960 – June 19, 1960 | Died. |
| Mortimer F. Elliott | Democratic | At-large | March 4, 1883 – March 4, 1885 | |
| William Cox Ellis | Federalist | 9th | March 4, 1823 – March 4, 1825 | |
| Phil English | Republican | 21st | January 3, 1995 – January 3, 2003 | |
| 3rd | January 3, 2003 – January 3, 2009 | |||
| Constantine J. Erdman | Democratic | 9th | March 4, 1893 – March 4, 1897 | |
| Jacob Erdman | Democratic | 6th | March 4, 1845 – March 4, 1847 | |
| Edmund F. Erk | Republican | 32nd | November 4, 1930 – March 4, 1933 | |
| Daniel Ermentrout | Democratic | 8th | March 4, 1881 – March 4, 1889 | |
| 9th | March 4, 1897 – September 17, 1899 | Died. | ||
| Russell Errett | Republican | 22nd | March 4, 1877 – March 4, 1883 | |
| Allen E. Ertel | Democratic | 17th | January 3, 1977 – January 3, 1983 | |
| Edwin D. Eshleman | Republican | 16th | January 3, 1967 – January 3, 1977 | |
| Harry A. Estep | Republican | 35th | March 4, 1927 – March 4, 1933 | |
| Charles J Esterly | Republican | 14th | March 4, 1925 – March 4, 1927 | |
| March 4, 1929 – March 4, 1931 | ||||
| Alvin Evans | Republican | 20th | March 4, 1901 – March 4, 1903 | |
| 19th | March 4, 1903 – March 4, 1905 | |||
| Dwight Evans | Democratic | 2nd | November 8, 2016 – January 3, 2019 | Redistricted. |
| 3rd | January 3, 2019 – present | Incumbent | ||
| Isaac N Evans | Republican | 7th | March 4, 1877 – March 4, 1879 | |
| March 4, 1883 – March 4, 1887 | ||||
| Joshua Evans Jr. | Jacksonian | 4th | March 4, 1829 – March 4, 1833 | |
| James B. Everhart | Republican | 6th | March 4, 1883 – March 4, 1887 | |
| William Everhart | Whig | 6th | March 4, 1853 – March 4, 1855 | |
| John H. Ewing | Whig | 20th | March 4, 1845 – March 4, 1847 | |
| Charles I. Faddis | Democratic | 25th | March 4, 1933 – December 4, 1942 | Resigned to join the US Army. |
| John R. Farr | Republican | 10th | March 4, 1911 – March 4, 1919 | |
| February 25, 1921 – March 4, 1921 | Successfully contested the election ofPatrick McLane. | |||
| John W. Farrelly | Whig | 22nd | March 4, 1847 – March 4, 1849 | |
| Patrick Farrelly | Democratic-Republican | 15th | March 4, 1821 – March 4, 1823 | Died. |
| 18th | March 4, 1823 – March 4, 1825 | |||
| Jacksonian | March 4, 1825 – January 12, 1826 | |||
| Chaka Fattah | Democratic | 2nd | January 3, 1995 – June 23, 2016 | Resigned due to conviction of corruption charges. |
| Clare G. Fenerty | Republican | 3rd | January 3, 1935 – January 3, 1937 | |
| Ivor D. Fenton | Republican | 13th | January 3, 1939 – January 3, 1945 | |
| 12th | January 3, 1945 – January 3, 1963 | |||
| John Findlay | Democratic-Republican | 5th | October 9, 1821 – March 4, 1823 | |
| 11th | March 4, 1823 – March 4, 1825 | |||
| Jacksonian | March 4, 1825 – March 4, 1827 | |||
| William Findley | Anti-Administration | 8th | March 4, 1791 – March 4, 1793 | |
| At-large | March 4, 1793 – March 4, 1795 | |||
| Democratic-Republican | 11th | March 4, 1795 – March 4, 1799 | ||
| 8th | March 4, 1803 – March 4, 1813 | |||
| 11th | March 4, 1813 – March 4, 1817 | |||
| Darwin A. Finney | Republican | 20th | March 4, 1867 – August 25, 1868 | Died. |
| Horatio G. Fisher | Republican | 18th | March 4, 1879 – March 4, 1883 | |
| Brian Fitzpatrick | Republican | 8th | January 3, 2017 – January 3, 2019 | Redistricted. |
| 1st | January 3, 2019 – present | Incumbent | ||
| Mike Fitzpatrick | Republican | 8th | January 3, 2005 – January 3, 2007 | Lost re-election. |
| January 3, 2011 – January 3, 2017 | Retired. | |||
| Thomas Fitzsimons | Pro-Administration | At-large | March 4, 1789 – March 4, 1791 | Redistricted. |
| 1st | March 4, 1791 – March 3, 1793 | Redistricted. | ||
| At-large | March 4, 1793 – March 4, 1795 | Lost re-election. | ||
| J. Harold Flannery | Democratic | 12th | January 3, 1937 – January 3, 1942 | Resigned to become judge of common pleas ofLuzerne County, Pennsylvania. |
| George W. Fleeger | Republican | 26th | March 4, 1885 – March 4, 1887 | |
| Daniel Flood | Democratic | 11th | January 3, 1945 – January 3, 1947 | |
| January 3, 1949 – January 3, 1953 | ||||
| January 3, 1955 – January 31, 1980 | Resigned due to allegations of bribery. | |||
| Thomas B. Florence | Democratic | 1st | March 4, 1851 – March 4, 1861 | |
| Benjamin K. Focht | Republican | 17th | March 4, 1907 – March 4, 1913 | |
| March 4, 1915 – March 4, 1923 | ||||
| 18th | March 4, 1933 – March 27, 1937 | |||
| Robert H. Foerderer | Republican | At-large | March 4, 1901 – March 4, 1903 | Died. |
| 4th | March 4, 1903 – July 26, 1903 | |||
| Thomas M. Foglietta | Democratic | 1st | January 3, 1981 – November 11, 1997 | Resigned to becomeAmbassador to Italy. |
| James Ford | Jacksonian | 9th | March 4, 1829 – March 4, 1833 | |
| Joseph Fornance | Democratic | 5th | March 4, 1839 – March 4, 1843 | |
| Thomas Forrest | Federalist | 1st | March 4, 1819 – March 4, 1821 | |
| October 8, 1822 – March 4, 1823 | ||||
| Chauncey Forward | Jacksonian | 13th | December 4, 1826 – March 4, 1831 | |
| Walter Forward | Democratic-Republican | 14th | October 8, 1822 – March 4, 1823 | |
| 16th | March 4, 1823 – March 4, 1825 | |||
| Henry D Foster | Democratic | 19th | March 4, 1843 – March 4, 1847 | |
| 21st | March 4, 1871 – March 4, 1873 | |||
| William W. Foulkrod | Republican | 5th | March 4, 1907 – November 13, 1910 | Died. |
| Jon D. Fox | Republican | 13th | January 3, 1995 – January 3, 1999 | |
| John Freedley | Whig | 5th | March 4, 1847 – March 4, 1851 | |
| Chapman Freeman | Republican | 1st | March 4, 1875 – March 4, 1879 | |
| Oliver W. Frey | Democratic | 9th | November 7, 1933 – January 3, 1939 | |
| Henry Frick | Whig | 13th | March 4, 1843 – March 1, 1844 | Died. |
| Jacob Fry Jr. | Jacksonian | 5th | March 4, 1835 – March 4, 1837 | |
| Democratic | March 4, 1837 – March 4, 1839 | |||
| Joseph Fry Jr. | Jacksonian | 7th | March 4, 1827 – March 4, 1831 | |
| George Fuller | Democratic | 12th | December 2, 1844 – March 4, 1845 | |
| Henry M Fuller | Whig | 11th | March 4, 1851 – March 4, 1853 | |
| Opposition | 12th | March 4, 1855 – March 4, 1857 | ||
| David Fullerton | Democratic-Republican | 5th | March 4, 1819 – May 15, 1820 | Resigned. |
| James G. Fulton | Republican | 31st | January 3, 1945 – January 3, 1953 | Died. |
| 27th | January 3, 1953 – October 6, 1971 | |||
| Grant Furlong | Democratic | 25th | January 3, 1943 – January 3, 1945 | |
| John Galbraith | Jacksonian | 25th | March 4, 1833 – March 4, 1837 | |
| Democratic | March 4, 1839 – March 4, 1841 | |||
| James A. Gallagher | Republican | 1st | January 3, 1943 – January 3, 1945 | |
| January 3, 1947 – January 3, 1949 | ||||
| Albert Gallatin | Democratic-Republican | 12th | March 4, 1795 – March 4, 1801 | |
| James Gamble | Democratic | 13th | March 4, 1851 – March 4, 1853 | |
| 15th | March 4, 1853 – March 4, 1855 | |||
| Mahlon M. Garland | Republican | At-large | March 4, 1915 – November 19, 1920 | Died. |
| Alfred B. Garner | Republican | 12th | March 4, 1909 – March 4, 1911 | |
| Fred C. Gartner | Republican | 5th | March 4, 1939 – March 4, 1941 | |
| William S. Garvin | Democratic | 22nd | March 4, 1845 – March 4, 1847 | |
| Athelston Gaston | Democratic | 26th | March 4, 1899 – March 4, 1901 | |
| Leon H. Gavin | Republican | 20th | January 3, 1943 – January 3, 1945 | |
| 19th | January 3, 1945 – January 3, 1953 | |||
| 23rd | January 3, 1953 – September 15, 1963 | |||
| Joseph M. Gaydos | Democratic | 20th | November 5, 1968 – January 3, 1993 | |
| George Gekas | Republican | 17th | January 3, 1983 – January 3, 2003 | |
| Charles L. Gerlach | Republican | 9th | January 3, 1939 – January 3, 1945 | |
| 8th | January 3, 1945 – May 5, 1947 | |||
| Jim Gerlach | Republican | 6th | January 3, 2003 – January 3, 2015 | |
| Fred B. Gernerd | Republican | 13th | March 4, 1921 – March 4, 1923 | |
| James Gerry | Democratic | 11th | March 4, 1839 – March 4, 1843 | |
| James L. Getz | Democratic | 8th | March 4, 1867 – March 4, 1873 | |
| James H. Gildea | Democratic | 13th | January 3, 1935 – January 3, 1939 | |
| Calvin W. Gilfillan | Republican | 20th | March 4, 1869 – March 4, 1871 | |
| Eugene P. Gillespie | Democratic | 25th | March 4, 1891 – March 4, 1893 | |
| Wilson D. Gillette | Republican | 15th | November 4, 1941 – January 3, 1945 | Died. |
| 14th | January 3, 1945 – August 7, 1951 | |||
| James L. Gillis | Democratic | 24th | March 4, 1857 – March 4, 1859 | |
| Alfred Gilmore | Democratic | 24th | March 4, 1849 – March 4, 1853 | |
| John Gilmore | Jacksonian | 16th | March 4, 1829 – March 4, 1833 | |
| Don H. Gingery | Democratic | 23rd | January 3, 1935 – January 3, 1939 | |
| Hugh Glasgow | Democratic-Republican | 4th | March 4, 1813 – March 4, 1817 | |
| Samuel F. Glatfelter | Democratic | 22nd | March 4, 1923 – March 4, 1925 | |
| John Gloninger | Federalist | 3rd | March 4, 1813 – August 2, 1813 | Resigned after being appointed associate judge of Lebanon County. |
| Adam J. Glossbrenner | Democratic | 15th | March 4, 1865 – March 4, 1869 | |
| William Godshalk | Republican | 7th | March 4, 1879 – March 4, 1883 | |
| Benjamin M. Golder | Republican | 4th | March 4, 1925 – March 4, 1933 | |
| George A Goodling | Republican | 19th | January 3, 1961 – January 3, 1965 | |
| January 3, 1967 – January 3, 1975 | ||||
| William F. Goodling | Republican | 19th | January 3, 1975 – January 3, 2001 | |
| George S. Graham | Republican | 2nd | March 4, 1913 – July 4, 1931 | Died. |
| Louis E. Graham | Republican | 26th | January 3, 1939 – January 3, 1945 | |
| 25th | January 3, 1945 – January 3, 1955 | |||
| William H. Graham | Republican | 23rd | November 29, 1898 – March 4, 1903 | |
| 29th | March 4, 1905 – March 4, 1911 | |||
| Kathryn E. Granahan | Democratic | 2nd | November 6, 1956 – January 3, 1963 | |
| William T. Granahan | Democratic | 2nd | January 3, 1945 – January 3, 1947 | |
| January 3, 1949 – May 25, 1956 | Died. | |||
| Joseph A. Gray | Democratic | 27th | January 3, 1935 – January 3, 1939 | |
| William H. Gray | Democratic | 2nd | January 3, 1979 – September 11, 1991 | Resigned. |
| Henry D. Green | Democratic | 9th | November 7, 1899 – March 4, 1903 | |
| Innis Green | Jacksonian | 6th | March 4, 1827 – March 4, 1831 | |
| William J. Green, Jr. | Democratic | 5th | January 3, 1945 – January 3, 1947 | |
| January 3, 1949 – December 21, 1963 | Died. | |||
| William J. Green III | Democratic | 5th | April 28, 1964 – January 3, 1973 | |
| 3rd | January 3, 1973 – January 3, 1977 | |||
| James C. Greenwood | Republican | 8th | January 3, 1993 – January 3, 2005 | |
| Andrew Gregg | Anti-Administration | 6th | March 4, 1791 – March 4, 1793 | |
| At-large | March 4, 1793 – March 4, 1795 | |||
| Democratic-Republican | 9th | March 4, 1795 – March 4, 1803 | ||
| 5th | March 4, 1803 – March 4, 1807 | |||
| Curtis H. Gregg | Democratic | 22nd | March 4, 1911 – March 4, 1913 | |
| William W Griest | Republican | 9th | March 4, 1909 – March 4, 1923 | Died. |
| 10th | March 4, 1923 – December 5, 1929 | |||
| Isaac Griffin | Democratic-Republican | 13th | May 13, 1813 – March 4, 1817 | |
| Samuel Griffith | Democratic | 20th | March 4, 1871 – March 4, 1873 | |
| Matthew Griswold | Republican | 26th | March 4, 1891 – March 4, 1893 | |
| March 4, 1895 – March 4, 1897 | ||||
| Chester H. Gross | Republican | 22nd | January 3, 1939 – January 3, 1941 | |
| January 3, 1943 – January 3, 1945 | ||||
| 21st | January 3, 1945 – January 3, 1949 | |||
| Samuel Gross | Democratic-Republican | 2nd | March 4, 1819 – March 4, 1823 | |
| Galusha A. Grow | Democratic | 12th | March 4, 1851 – March 4, 1853 | |
| 14th | March 4, 1853 – March 4, 1857 | |||
| Republican | March 4, 1857 – March 4, 1863 | |||
| At-large | February 26, 1894 – March 4, 1903 | |||
| Amos Gustine | Democratic | 13th | March 4, 1841 – March 4, 1843 | |
| John Hahn | Democratic-Republican | 2nd | March 4, 1815 – March 4, 1817 | |
| Harry L. Haines | Democratic | 22nd | March 4, 1931 – January 3, 1939 | |
| January 3, 1941 – January 3, 1943 | ||||
| Richard J. Haldeman | Democratic | 15th | March 4, 1869 – March 4, 1873 | |
| James T. Hale | Republican | 15th | March 4, 1859 – March 4, 1863 | |
| Independent Republican | 18th | March 4, 1863 – March 4, 1865 | ||
| Chapin Hall | Republican | 24th | March 4, 1859 – March 4, 1861 | |
| James K. P. Hall | Democratic | 28th | March 4, 1899 – November 29, 1902 | Resigned after being elected to thePennsylvania State Senate. |
| Norman Hall | Democratic | 26th | March 4, 1887 – March 4, 1889 | |
| Edwin Hallowell | Democratic | 7th | March 4, 1891 – March 4, 1893 | |
| Frederick Halterman | Republican | 3rd | March 4, 1895 – March 4, 1897 | |
| John Hamilton | Democratic-Republican | 10th | March 4, 1805 – March 4, 1807 | |
| Robert H. Hammond | Democratic | 16th | March 4, 1837 – March 4, 1841 | |
| Moses Hampton | Whig | 21st | March 4, 1847 – March 4, 1851 | |
| John A. Hanna | Democratic-Republican | 6th | March 4, 1797 – March 4, 1803 | Died. |
| 4th | March 4, 1803 – July 23, 1805 | |||
| Alfred C. Harmer | Republican | 5th | March 4, 1871 – March 4, 1875 | |
| March 4, 1877 – March 6, 1900 | Died. | |||
| James Harper | Anti-Jacksonian | 2nd | March 4, 1833 – March 4, 1837 | |
| Robert Harris | Democratic-Republican | 6th | March 4, 1823 – March 4, 1825 | |
| Jacksonian | March 4, 1825 – March 4, 1827 | |||
| Frank G. Harrison | Democratic | 11th | January 3, 1983 – January 3, 1985 | |
| Samuel S. Harrison | Jacksonian | 23rd | March 4, 1833 – March 4, 1837 | |
| Joseph J. Hart | Democratic | 8th | March 4, 1895 – March 4, 1897 | |
| Melissa Hart | Republican | 4th | January 3, 2001 – January 3, 2007 | |
| Thomas Hartley | Pro-Administration | At-large | March 4, 1789 – March 4, 1791 | Died. |
| 7th | March 4, 1791 – March 4, 1793 | |||
| At-large | March 4, 1793 – March 4, 1795 | |||
| Federalist | 8th | March 4, 1795 – December 21, 1800 | ||
| Jesse L. Hartman | Republican | 19th | March 4, 1911 – March 4, 1913 | |
| Samuel Hays | Democratic | 22nd | March 4, 1843 – March 4, 1845 | |
| James M. Hazlett | Republican | 1st | March 4, 1927 – October 20, 1927 | Resigned. |
| Robert D. Heaton | Republican | 12th | March 4, 1915 – March 4, 1919 | |
| Daniel B Heiner | Republican | 21st | March 4, 1893 – March 4, 1897 | |
| H. John Heinz III | Republican | 18th | November 2, 1971 – January 3, 1977 | |
| Joseph Hemphill | Federalist | 3rd | March 4, 1801 – March 4, 1803 | |
| 1st | March 4, 1819 – March 4, 1823 | Resigned. | ||
| 2nd | March 4, 1823 – 1826 | |||
| Jacksonian | March 4, 1829 – March 4, 1831 | |||
| Joseph Henderson | Jacksonian | 14th | March 4, 1833 – March 4, 1837 | |
| Samuel Henderson | Federalist | 2nd | October 11, 1814 – March 4, 1815 | |
| Thomas Henry | Anti-Masonic | 24th | March 4, 1837 – March 4, 1841 | |
| Whig | March 4, 1841 – March 4, 1843 | |||
| Jacob Hibshman | Democratic-Republican | 3rd | March 4, 1819 – March 4, 1821 | |
| John Hickman | Democratic | 6th | March 4, 1855 – March 4, 1859 | |
| Anti-Lecompton Democratic | March 4, 1859 – March 4, 1861 | |||
| Republican | March 4, 1861 – March 4, 1863 | |||
| Josiah D. Hicks | Republican | 20th | March 4, 1893 – March 4, 1899 | |
| John A. Hiestand | Republican | 9th | March 4, 1885 – March 4, 1889 | |
| Daniel Hiester | Anti-Administration | At-large | March 4, 1789 – March 4, 1791 | Resigned. |
| 4th | March 4, 1791 – March 4, 1793 | |||
| At-large | March 4, 1793 – March 4, 1795 | |||
| Democratic-Republican | 5th | March 4, 1795 – July 1, 1796 | ||
| Daniel Hiester | Democratic-Republican | 3rd | March 4, 1809 – March 4, 1811 | |
| Isaac E. Hiester | Whig | 9th | March 4, 1853 – March 4, 1855 | |
| John Hiester | Democratic-Republican | 3rd | March 4, 1807 – March 4, 1809 | |
| Joseph Hiester | Democratic-Republican | 5th | December 1, 1797 – March 4, 1803 | |
| 3rd | March 4, 1803 – March 4, 1805 | |||
| 7th | March 4, 1815 – December ????, 1820 | |||
| William Hiester | Anti-Masonic | 4th | March 4, 1831 – March 4, 1837 | |
| William H. Hines | Democratic | 12th | March 4, 1893 – March 4, 1895 | |
| Daniel K. Hoch | Democratic | 14th | January 3, 1943 – January 3, 1945 | |
| 13th | January 3, 1945 – January 3, 1947 | |||
| Joe Hoeffel | Democratic | 13th | January 3, 1999 – January 3, 2005 | |
| Carl H. Hoffman | Republican | 23rd | May 21, 1946 – January 3, 1947 | |
| John Hoge | Democratic-Republican | 10th | November 2, 1804 – March 4, 1805 | |
| William Hoge | Democratic-Republican | 12th | March 4, 1801 – March 4, 1803 | Resigned. |
| 10th | March 4, 1803 – October 15, 1804 | |||
| March 4, 1807 – March 4, 1809 | ||||
| Tim Holden | Democratic | 6th | January 3, 1993 – January 3, 2003 | Redistricted. |
| 17th | January 3, 2003 – January 3, 2013 | Lost renomination. | ||
| Elmer J. Holland | Democratic | 33rd | May 19, 1942 – January 3, 1943 | |
| 30th | January 24, 1956 – January 3, 1963 | |||
| 20th | January 3, 1963 – August 9, 1968 | |||
| Enos Hook | Democratic | 20th | March 4, 1839 – April 18, 1841 | Resigned. |
| Albert C. Hopkins | Republican | 16th | March 4, 1891 – March 4, 1895 | |
| James H Hopkins | Democratic | 22nd | March 4, 1875 – March 4, 1877 | |
| March 4, 1883 – March 4, 1885 | ||||
| Joseph Hopkinson | Federalist | 1st | March 4, 1815 – March 4, 1819 | |
| Robert F. Hopwood | Republican | 23rd | March 4, 1915 – March 4, 1917 | |
| Henry Horn | Jacksonian | 2nd | March 4, 1831 – March 4, 1833 | |
| John W. Hornbeck | Whig | 6th | March 4, 1847 – January 16, 1848 | Died. |
| Jacob Hostetter | Democratic-Republican | 4th | November 16, 1818 – March 4, 1821 | |
| Chrissy Houlahan | Democratic | 6th | January 3, 2019 – present | Incumbent |
| John W. Howe | Free Soil | 22nd | March 4, 1849 – March 4, 1851 | |
| Whig | March 4, 1851 – March 4, 1853 | |||
| Thomas M Howe | Whig | 21st | March 4, 1851 – March 4, 1853 | |
| 22nd | March 4, 1853 – March 4, 1855 | |||
| George Howell | Democratic | 10th | March 4, 1903 – February 10, 1904 | Lost election contest toWilliam Connell. |
| Edward B Hubley | Jacksonian | 8th | March 4, 1835 – March 4, 1837 | |
| Democratic | March 4, 1837 – March 4, 1839 | |||
| George F Huff | Republican | 21st | March 4, 1891 – March 4, 1893 | |
| At-large | March 4, 1895 – March 4, 1897 | |||
| 22nd | March 4, 1903 – March 4, 1911 | |||
| Willis J. Hulings | Progressive | 28th | March 4, 1913 – March 4, 1915 | |
| Republican | March 4, 1919 – March 4, 1921 | |||
| John M. Hyneman | Democratic-Republican | 3rd | March 4, 1811 – March 4, 1813 | Resigned. |
| 7th | March 4, 1813 – August 2, 1813 | |||
| Peter Ihrie, Jr. | Jacksonian | 8th | October 13, 1829 – March 4, 1833 | |
| Charles J Ingersoll | Democratic-Republican | 1st | March 4, 1813 – March 4, 1815 | |
| Democratic | 3rd | March 4, 1841 – March 4, 1843 | ||
| 4th | March 4, 1843 – March 4, 1849 | |||
| Joseph R Ingersoll | Anti-Jacksonian | 2nd | March 4, 1835 – March 4, 1837 | |
| Whig | October 12, 1841 – March 4, 1849 | |||
| Samuel D. Ingham | Democratic-Republican | 6th | March 4, 1813 – July 6, 1818 | Resigned. |
| October 8, 1822 – March 4, 1823 | ||||
| Alexander Irvin | Whig | 24th | March 4, 1847 – March 4, 1849 | |
| James Irvin | Whig | 14th | March 4, 1841 – March 4, 1843 | |
| 17th | March 4, 1843 – March 4, 1845 | |||
| William Irvine | Anti-Administration | At-large | March 4, 1793 – March 4, 1795 | |
| Jared Irwin | Democratic-Republican | 10th | March 4, 1813 – March 4, 1817 | |
| Thomas Irwin | Jacksonian | 14th | March 4, 1829 – March 4, 1831 | |
| William W. Irwin | Whig | 22nd | March 4, 1841 – March 4, 1843 | |
| Summers M. Jack | Republican | 21st | March 4, 1899 – March 4, 1903 | |
| William Jack | Democratic | 23rd | March 4, 1841 – March 4, 1843 | |
| Oscar L. Jackson | Republican | 24th | March 4, 1885 – March 4, 1889 | |
| Israel Jacobs | Pro-Administration | 3rd | March 4, 1791 – March 4, 1793 | |
| Cornelius C. Jadwin | Republican | 15th | March 4, 1881 – March 4, 1883 | |
| Benjamin F. James | Republican | 7th | January 3, 1949 – January 3, 1959 | |
| Francis James | Anti-Masonic | 4th | March 4, 1839 – March 4, 1841 | |
| Whig | March 4, 1841 – March 4, 1843 | |||
| Benjamin Jarrett | Republican | 20th | January 3, 1937 – January 3, 1943 | |
| Mitchell Jenkins | Republican | 11th | January 3, 1947 – January 3, 1949 | |
| Robert Jenkins | Federalist | 3rd | March 4, 1807 – March 4, 1811 | |
| George A. Jenks | Democratic | 25th | March 4, 1875 – March 4, 1877 | |
| Michael H. Jenks | Whig | 6th | March 4, 1843 – March 4, 1845 | |
| Albert W. Johnson | Republican | 23rd | November 5, 1963 – January 3, 1977 | |
| Philip Johnson | Democratic | 13th | March 4, 1861 – March 4, 1863 | Died. |
| 11th | March 4, 1863 – January 29, 1867 | |||
| Evan J. Jones | Republican | 21st | March 4, 1919 – March 4, 1923 | |
| J Glancy Jones | Democratic | 9th | March 4, 1851 – March 4, 1853 | |
| 8th | February 4, 1854 – October 30, 1858 | Resigned to becomeMinister to Austria. | ||
| Owen Jones | Democratic | 5th | March 4, 1857 – March 4, 1859 | |
| William Jones | Democratic-Republican | 1st | March 4, 1801 – March 4, 1803 | |
| Edwin J. Jorden | Republican | 15th | February 23, 1895 – March 4, 1895 | |
| John Joyce | Republican | 13th | January 3, 2019 – present | Incumbent |
| Benjamin F. Junkin | Republican | 16th | March 4, 1859 – March 4, 1861 | |
| Paul E. Kanjorski | Democratic | 11th | January 3, 1985 – January 3, 2011 | |
| Carroll D. Kearns | Republican | 28th | January 3, 1947 – January 3, 1953 | |
| 24th | January 3, 1953 – January 3, 1963 | |||
| George M. Keim | Democratic | 9th | March 17, 1838 – March 4, 1843 | |
| William H. Keim | Republican | 8th | December 7, 1858 – March 4, 1859 | |
| Abraham L. Keister | Republican | 22nd | March 4, 1913 – March 4, 1917 | |
| Fred Keller | Republican | 12th | May 21, 2019 – January 3, 2023 | Retired. |
| Augustine B. Kelley | Democratic | 28th | January 3, 1941 – January 3, 1945 | Died. |
| 27th | January 3, 1945 – January 3, 1953 | |||
| 21st | January 3, 1953 – November 20, 1957 | |||
| William D. Kelley | Republican | 4th | March 4, 1861 – January 9, 1890 | Died. |
| James Kelly | Federalist | 6th | March 4, 1805 – March 4, 1809 | |
| Mike Kelly | Republican | 3rd | January 3, 2011 – January 3, 2019 | Redistricted. |
| 16th | January 3, 2019 – present | Incumbent | ||
| M. Clyde Kelly | Republican | 30th | March 4, 1913 – March 4, 1915 | |
| Progressive | March 4, 1917 – March 4, 1919 | |||
| Republican | March 4, 1919 – March 4, 1923 | |||
| 33rd | March 4, 1923 – January 3, 1933 | |||
| 31st | March 4, 1933 – January 3, 1935 | |||
| Samuel A Kendall | Republican | 23rd | March 4, 1919 – March 4, 1923 | Died. |
| 24th | March 4, 1923 – January 8, 1933 | |||
| Everett Kent | Democratic | 30th | March 4, 1923 – March 4, 1925 | |
| March 4, 1927 – March 4, 1929 | ||||
| James Kerr | Democratic | 28th | March 4, 1889 – March 4, 1891 | |
| Winthrop W. Ketcham | Republican | 12th | March 4, 1875 – July 19, 1876 | Resigned after being appointed judge of theUnited States District Court for the Western District of Pennsylvania. |
| Edgar R Kiess | Republican | 15th | March 4, 1913 – March 4, 1923 | Died. |
| 16th | March 4, 1923 – July 20, 1930 | |||
| John W Killinger | Republican | 10th | March 4, 1859 – March 4, 1863 | |
| March 4, 1871 – March 4, 1875 | ||||
| 14th | March 4, 1877 – March 4, 1881 | |||
| Adam King | Jacksonian | 10th | March 4, 1827 – March 4, 1833 | |
| Henry King | Jacksonian | 7th | March 4, 1831 – March 4, 1833 | |
| 8th | March 4, 1833 – March 4, 1835 | |||
| Karl C. King | Republican | 8th | November 6, 1951 – January 3, 1957 | |
| J. Roland Kinzer | Republican | 10th | January 28, 1930 – January 3, 1945 | |
| 9th | January 3, 1945 – January 3, 1947 | |||
| George W Kipp | Democratic | 14th | March 4, 1907 – March 4, 1909 | |
| March 4, 1911 – July 24, 1911 | Died. | |||
| William H. Kirkpatrick | Republican | 26th | March 4, 1921 – March 4, 1923 | |
| William S. Kirkpatrick | Republican | 8th | March 4, 1897 – March 4, 1899 | |
| John W. Kittera | Pro-Administration | 5th | March 4, 1791 – March 4, 1793 | |
| At-large | March 4, 1793 – March 4, 1795 | |||
| Federalist | 7th | March 4, 1795 – March 3, 1801 | ||
| Thomas Kittera | Anti-Jacksonian | 2nd | October 26, 1826 – March 4, 1827 | |
| I. Clinton Kline | Republican | 16th | March 4, 1921 – March 4, 1923 | |
| Marcus C. L. Kline | Democratic | 13th | March 4, 1903 – March 4, 1907 | |
| John Klingensmith, Jr. | Jacksonian | 19th | March 4, 1835 – March 4, 1837 | |
| Democratic | March 4, 1837 – March 4, 1839 | |||
| Ron Klink | Democratic | 4th | January 3, 1993 – January 3, 2001 | |
| Robert Klotz | Democratic | 11th | March 4, 1879 – March 4, 1883 | |
| Jonathan Knight | Opposition | 20th | March 4, 1855 – March 4, 1857 | |
| Joseph P. Kolter | Democratic | 4th | January 3, 1983 – January 3, 1993 | |
| William H. Koontz | Republican | 16th | July 18, 1866 – March 4, 1869 | |
| Peter H. Kostmayer | Democratic | 8th | January 3, 1977 – January 3, 1981 | |
| January 3, 1983 – January 3, 1993 | ||||
| Jacob Krebs | Jacksonian | 7th | December 4, 1826 – March 4, 1827 | |
| Aaron S. Kreider | Republican | 18th | March 4, 1913 – March 4, 1923 | |
| George Kremer | Democratic-Republican | 9th | March 4, 1823 – March 4, 1825 | |
| Jacksonian | March 4, 1825 – March 4, 1829 | |||
| George F. Kribbs | Democratic | 28th | March 4, 1891 – March 4, 1895 | |
| Joseph H. Kuhns | Whig | 19th | March 4, 1851 – March 4, 1853 | |
| Monroe H. Kulp | Republican | 17th | March 4, 1895 – March 4, 1899 | |
| John Christian Kunkel | Opposition | 10th | March 4, 1855 – March 4, 1857 | |
| Republican | March 4, 1857 – March 4, 1859 | |||
| John C. Kunkel | Republican | 19th | January 3, 1939 – January 3, 1945 | |
| 18th | January 3, 1945 – January 3, 1951 | |||
| 16th | May 16, 1961 – December 30, 1966 | Resigned. | ||
| J Banks Kurtz | Republican | 21st | March 4, 1923 – March 4, 1933 | |
| 23rd | March 4, 1933 – January 3, 1935 | |||
| William H Kurtz | Democratic | 15th | March 4, 1851 – March 4, 1853 | |
| 16th | March 4, 1853 – March 4, 1855 | |||
| Abner Lacock | Democratic-Republican | 11th | March 4, 1811 – March 4, 1813 | |
| Daniel F. Lafean | Republican | 20th | March 4, 1903 – March 4, 1913 | |
| At-large | March 4, 1915 – March 4, 1917 | |||
| John A. Lafore, Jr. | Republican | 13th | November 5, 1957 – January 3, 1961 | |
| Conor Lamb | Democratic | 18th | March 13, 2018 – January 3, 2019 | Switched districts. |
| 17th | January 3, 2019 – January 3, 2023 | Retired torun for U.S. senator. | ||
| James Landy | Democratic | 3rd | March 4, 1857 – March 4, 1859 | |
| J. N. Langham | Republican | 27th | March 4, 1909 – March 4, 1915 | |
| John Laporte | Jacksonian | 17th | March 4, 1833 – March 4, 1837 | |
| George V. E Lawrence | Republican | 24th | March 4, 1865 – March 4, 1869 | |
| March 4, 1883 – March 4, 1885 | ||||
| Joseph Lawrence | Anti-Jacksonian | 15th | March 4, 1825 – March 4, 1829 | |
| Whig | 21st | March 4, 1841 – April 17, 1842 | Died. | |
| Jesse Lazear | Democratic | 20th | March 4, 1861 – March 4, 1863 | |
| 24th | March 4, 1863 – March 4, 1865 | |||
| Raymond F. Lederer | Democratic | 3rd | January 3, 1977 – April 29, 1981 | Resigned. |
| Robert E. Lee | Democratic | 12th | March 4, 1911 – March 4, 1915 | |
| Summer Lee | Democratic | 12th | January 3, 2023 – present | Incumbent |
| J. Russell Leech | Republican | 20th | March 4, 1927 – January 29, 1932 | resigned on appointment as member ofUS Board of Tax Appeals |
| Isaac Leet | Democratic | 21st | March 4, 1839 – March 4, 1841 | |
| Joseph Lefever | Democratic-Republican | 3rd | March 4, 1811 – March 4, 1813 | |
| William E. Lehman | Democratic | 1st | March 4, 1861 – March 4, 1863 | |
| Michael Leib | Democratic-Republican | 2nd | March 4, 1799 – March 4, 1803 | Resigned. |
| 1st | March 4, 1803 – February 14, 1806 | |||
| Owen D. Leib | Democratic | 11th | March 4, 1845 – March 4, 1847 | |
| Paul Leidy | Democratic | 12th | December 7, 1857 – March 4, 1859 | |
| George G. Leiper | Jacksonian | 4th | March 4, 1829 – March 4, 1831 | |
| John Leisenring | Republican | 12th | March 4, 1895 – March 4, 1897 | |
| John T. Lenahan | Democratic | 11th | March 4, 1907 – March 4, 1909 | |
| Fred C. Leonard | Republican | 16th | March 4, 1895 – March 4, 1897 | |
| John V. Lesher | Democratic | 16th | March 4, 1913 – March 4, 1921 | |
| Lewis C. Levin | Know Nothing | 1st | March 4, 1845 – March 4, 1851 | |
| Fred E. Lewis | Republican | At-large | March 4, 1913 – March 4, 1915 | |
| Robert J. Lewis | Republican | 19th | March 4, 1901 – March 4, 1903 | |
| Norton L. Lichtenwalner | Democratic | 14th | March 4, 1931 – March 4, 1933 | |
| Franklin H. Lichtenwalter | Republican | 8th | September 9, 1947 – January 3, 1951 | |
| Michael Liebel, Jr. | Democratic | 25th | March 4, 1915 – March 4, 1917 | |
| Mial E. Lilley | Republican | 14th | March 4, 1905 – March 4, 1907 | |
| William Lilly | Republican | At-large | March 4, 1893 – December 1, 1893 | Died. |
| James F. Lind | Democratic | 21st | January 3, 1949 – January 3, 1953 | |
| Henry Logan | Jacksonian | 11th | March 4, 1835 – March 4, 1837 | |
| Democratic | March 4, 1837 – March 4, 1839 | |||
| J. Washington Logue | Democratic | 6th | March 4, 1913 – March 4, 1915 | |
| Henry C. Longnecker | Republican | 7th | March 4, 1859 – March 4, 1861 | |
| Christian Lower | Democratic-Republican | 3rd | March 4, 1805 – December 19, 1806 | Died. |
| John B. C. Lucas | Democratic-Republican | 11th | March 4, 1803 – ????, 1805 | Resigned before the assembling of the9th Congress to become district judge of theUnited States District Court for the District of Louisiana. |
| Aaron Lyle | Democratic-Republican | 10th | March 4, 1809 – March 4, 1813 | |
| 12th | March 4, 1813 – March 4, 1817 | |||
| John Lynch | Democratic | 12th | March 4, 1887 – March 4, 1889 | |
| Ryan Mackenzie | Republican | 7th | January 3, 2025 – present | Incumbent |
| Levi A. Mackey | Democratic | 20th | March 4, 1875 – March 4, 1879 | |
| Samuel Maclay | Democratic-Republican | 6th | March 4, 1795 – March 4, 1797 | |
| William Maclay | Democratic-Republican | 5th | March 4, 1815 – March 4, 1819 | |
| William P. Maclay | Democratic-Republican | 9th | October 8, 1816 – March 4, 1821 | |
| James T. Maffett | Republican | 25th | March 4, 1887 – March 4, 1889 | |
| James M. Magee | Republican | 35th | March 4, 1923 – March 4, 1927 | |
| John A. Magee | Democratic | 15th | March 4, 1873 – March 4, 1875 | |
| Frederick W. Magrady | Republican | 17th | March 4, 1925 – March 4, 1933 | |
| Thaddeus M Mahon | Republican | 18th | March 4, 1893 – March 4, 1903 | |
| 17th | March 4, 1903 – March 4, 1907 | |||
| Levi Maish | Democratic | 19th | March 4, 1875 – March 4, 1879 | |
| March 4, 1887 – March 4, 1891 | ||||
| Franklin J. Maloney | Republican | 4th | January 3, 1947 – January 3, 1949 | |
| Job Mann | Jacksonian | 18th | March 4, 1835 – March 4, 1837 | |
| Democratic | 19th | March 4, 1847 – March 4, 1851 | ||
| Joel K. Mann | Jacksonian | 5th | March 4, 1831 – March 4, 1835 | |
| Albert G. Marchand | Democratic | 19th | March 4, 1839 – March 4, 1843 | |
| David Marchand | Democratic-Republican | 11th | March 4, 1817 – March 4, 1821 | |
| Marjorie Margolies-Mezvinsky | Democratic | 13th | January 3, 1993 – January 3, 1995 | Lost re-election. |
| Tom Marino | Republican | 10th | January 3, 2011 – January 3, 2019 | Redistricted. |
| 12th | January 3, 2019 – January 23, 2019 | Resigned. | ||
| Philip S Markley | Democratic-Republican | 5th | March 4, 1823 – March 4, 1825 | |
| Anti-Jacksonian | March 4, 1825 – March 4, 1827 | |||
| Marc L. Marks | Republican | 24th | January 3, 1977 – January 3, 1983 | |
| Alem Marr | Jacksonian | 9th | March 4, 1829 – March 4, 1831 | |
| Frank Mascara | Democratic | 20th | January 3, 1995 – January 3, 2003 | |
| Charles Matthews | Republican | 24th | March 4, 1911 – March 4, 1913 | |
| William McAleer | Democratic | 3rd | March 4, 1891 – March 4, 1895 | |
| March 4, 1897 – March 4, 1901 | ||||
| Archibald McAllister | Democratic | 17th | March 4, 1863 – March 4, 1865 | |
| Joseph A. McArdle | Democratic | 33rd | January 3, 1939 – January 5, 1942 | Resigned to serve on Pittsburgh City Council. |
| Moses McClean | Democratic | 15th | March 4, 1845 – March 4, 1847 | |
| William McClelland | Democratic | 24th | March 4, 1871 – March 4, 1873 | |
| Blair McClenachan | Democratic-Republican | 2nd | March 4, 1797 – March 4, 1799 | |
| Charles McClure | Democratic | 13th | March 4, 1837 – March 4, 1839 | |
| December 7, 1840 – March 4, 1841 | ||||
| Samuel K. McConnell, Jr. | Republican | 17th | January 18, 1944 – January 3, 1945 | Resigned. |
| 16th | January 3, 1945 – January 3, 1953 | |||
| 13th | January 3, 1953 – September 1, 1957 | |||
| Henry C. McCormick | Republican | 16th | March 4, 1887 – March 4, 1891 | |
| Robert McCoy | Jacksonian | 11th | November 22, 1831 – March 4, 1833 | |
| George D. McCreary | Republican | 6th | March 4, 1903 – March 4, 1913 | |
| William McCreery | Democratic | 15th | March 4, 1829 – March 4, 1831 | |
| George McCulloch | Democratic | 14th | November 20, 1839 – March 4, 1841 | |
| John McCulloch | Whig | 18th | March 4, 1853 – March 4, 1855 | |
| Welty McCullogh | Republican | 21st | March 4, 1887 – March 4, 1889 | |
| Thomas G. McCullough | Federalist | 5th | October 17, 1820 – March 4, 1821 | |
| Joseph M. McDade | Republican | 10th | January 3, 1963 – January 3, 1999 | |
| Alexander McDowell | Republican | At-large | March 4, 1893 – March 4, 1895 | |
| John McDowell | Republican | 31st | January 3, 1939 – January 3, 1941 | |
| 29th | January 3, 1947 – January 3, 1949 | |||
| Louis T. McFadden | Republican | 14th | March 4, 1915 – March 4, 1923 | |
| 15th | March 4, 1923 – January 3, 1935 | |||
| Robert N. McGarvey | Republican | 2nd | January 3, 1947 – January 3, 1949 | |
| Herbert J. McGlinchey | Democratic | 6th | January 3, 1945 – January 3, 1947 | |
| James P. McGranery | Democratic | 2nd | January 3, 1937 – November 17, 1943 | Resigned after being appointed an assistant to theAttorney General. |
| Paul McHale | Democratic | 15th | January 3, 1993 – January 3, 1999 | |
| John G. McHenry | Democratic | 16th | March 4, 1907 – December 27, 1912 | Died. |
| Abraham R. McIlvaine | Whig | 7th | March 4, 1843 – March 4, 1849 | |
| Ebenezer McJunkin | Republican | 23rd | March 4, 1871 – ????, 1874/1875 | |
| Samuel McKean | Democratic-Republican | 9th | March 4, 1823 – March 4, 1825 | |
| Jacksonian | March 4, 1825 – March 4, 1829 | |||
| Thomas M. T McKennan | Anti-Masonic | 15th | March 4, 1831 – March 4, 1833 | |
| 21st | March 4, 1833 – March 4, 1839 | |||
| Whig | May 30, 1842 – March 4, 1843 | |||
| Jacob K. McKenty | Democratic | 8th | December 3, 1860 – March 4, 1861 | |
| Robert McKnight | Republican | 22nd | March 4, 1859 – March 4, 1863 | |
| James X. McLanahan | Democratic | 16th | March 4, 1849 – March 4, 1853 | |
| Patrick McLane | Democratic | 10th | March 4, 1919 – February 25, 1921 | Lost election contest toJohn R. Farr. |
| Joseph McLaughlin | Republican | At-large | March 4, 1917 – March 4, 1919 | |
| March 4, 1921 – March 4, 1923 | ||||
| John McNair | Democratic | 5th | March 4, 1851 – March 4, 1855 | |
| Edward McPherson | Republican | 17th | March 4, 1859 – March 4, 1863 | |
| James McSherry | Federalist | 5th | March 4, 1821 – March 4, 1823 | |
| Pat Meehan | Republican | 7th | January 3, 2011 – April 27, 2018 | Resigned. |
| Franklin Menges | Republican | 22nd | March 4, 1925 – March 4, 1931 | |
| Ulysses Mercur | Republican | 13th | March 4, 1865 – December 2, 1872 | Resigned after being appointed as judge of theSupreme Court of Pennsylvania. |
| Dan Meuser | Republican | 9th | January 3, 2019 – present | Incumbent |
| Benjamin F. Meyers | Democratic | 16th | March 4, 1871 – March 4, 1873 | |
| Ner Middleswarth | Whig | 10th | March 4, 1853 – March 4, 1855 | |
| Daniel H. Miller | Democratic-Republican | 3rd | March 4, 1823 – March 4, 1825 | |
| Jacksonian | March 4, 1825 – March 4, 1831 | |||
| George F. Miller | Republican | 14th | March 4, 1865 – March 4, 1869 | |
| Jesse Miller | Jacksonian | 13th | March 4, 1833 – October 30, 1836 | Resigned to become the First Auditor of theUnited States Department of the Treasury. |
| Samuel H Miller | Republican | 26th | March 4, 1881 – March 4, 1885 | |
| 28th | March 4, 1915 – March 4, 1917 | |||
| Thomas B. Miller | Republican | 12th | May 19, 1942 – January 3, 1945 | |
| William H. Miller | Democratic | 14th | March 4, 1863 – March 4, 1865 | |
| William H. Milliken, Jr. | Republican | 7th | January 3, 1959 – January 3, 1965 | |
| William Millward | Opposition | 3rd | March 4, 1855 – March 4, 1857 | |
| Republican | 4th | March 4, 1859 – March 4, 1861 | ||
| James Milnor | Federalist | 1st | March 4, 1811 – March 4, 1813 | |
| William Milnor | Federalist | 2nd | March 4, 1807 – March 4, 1811 | |
| 1st | March 4, 1815 – March 4, 1817 | |||
| March 4, 1819 – May 8, 1822 | Resigned. | |||
| Charles Miner | Anti-Jacksonian | 4th | March 4, 1825 – March 4, 1829 | |
| James S. Mitchell | Democratic-Republican | 4th | March 4, 1821 – March 4, 1823 | |
| 10th | March 4, 1823 – March 4, 1825 | |||
| Jacksonian | March 4, 1825 – March 4, 1827 | |||
| John I. Mitchell | Republican | 16th | March 4, 1877 – March 4, 1881 | |
| John Mitchell | Jacksonian | 12th | March 4, 1825 – March 4, 1829 | |
| John Moffet | Democratic | 3rd | March 4, 1869 – April 9, 1869 | Lost contested election toLeonard Myers. |
| Daniel Montgomery, Jr. | Democratic-Republican | 5th | March 4, 1807 – March 4, 1809 | |
| John G. Montgomery | Democratic | 12th | March 4, 1857 – April 24, 1857 | Died. |
| William Montgomery | Democratic | 20th | March 4, 1857 – March 4, 1861 | |
| William Montgomery | Anti-Administration | At-large | March 4, 1793 – March 4, 1795 | |
| Reuben O. Moon | Republican | 4th | November 3, 1903 – March 4, 1913 | |
| Henry D. Moore | Whig | 3rd | March 4, 1849 – March 4, 1853 | |
| J. Hampton Moore | Republican | 3rd | November 6, 1906 – January 4, 1920 | Resigned after being electedMayor of Philadelphia. |
| Robert Moore | Democratic-Republican | 15th | March 4, 1817 – March 4, 1821 | |
| Samuel Moore | Democratic-Republican | 6th | October 13, 1818 – May 20, 1822 | |
| William S. Moore | Republican | 24th | March 4, 1873 – March 4, 1875 | |
| James K. Moorhead | Republican | 21st | March 4, 1859 – March 4, 1863 | |
| 22nd | March 4, 1863 – March 4, 1869 | |||
| William S. Moorhead | Democratic | 28th | January 3, 1959 – January 3, 1963 | |
| 14th | January 3, 1963 – January 3, 1981 | |||
| Thomas E. Morgan | Democratic | 24th | January 3, 1945 – January 3, 1953 | |
| 26th | January 3, 1953 – January 3, 1973 | |||
| 22nd | January 3, 1973 – January 3, 1977 | |||
| John M. Morin | Republican | At-large | March 4, 1913 – March 4, 1915 | |
| 31st | March 4, 1915 – March 4, 1923 | |||
| 34th | March 4, 1923 – March 4, 1929 | |||
| Theodore L. Moritz | Democratic | 32nd | January 3, 1935 – January 3, 1937 | |
| Daniel J. Morrell | Republican | 17th | March 4, 1867 – March 4, 1871 | |
| Edward de Veaux Morrell | Republican | 5th | November 6, 1900 – March 4, 1907 | |
| Edward J Morris | Whig | 1st | March 4, 1843 – March 4, 1845 | |
| 2nd | March 4, 1857 – June 8, 1861 | Resigned to becomeMinister to the Ottoman Empire. | ||
| Mathias Morris | Anti-Jacksonian | 6th | March 4, 1835 – March 4, 1837 | |
| Whig | March 4, 1837 – March 4, 1839 | |||
| Samuel W. Morris | Democratic | 17th | March 4, 1837 – March 4, 1841 | |
| John A. Morrison | Democratic | 7th | March 4, 1851 – March 4, 1853 | |
| Guy L. Moser | Democratic | 14th | January 3, 1937 – January 3, 1943 | |
| James Mosgrove | Greenback | 25th | March 4, 1881 – March 4, 1883 | |
| Frederick A. Muhlenberg | Republican | 13th | January 3, 1947 – January 3, 1949 | |
| Frederick A. C. Muhlenberg | Pro-Administration | At-large | March 4, 1789 – March 4, 1791 | |
| Anti-Administration | 2nd | March 4, 1791 – March 4, 1793 | ||
| At-large | March 4, 1793 – March 4, 1795 | |||
| Democratic-Republican | 2nd | March 4, 1795 – March 4, 1797 | ||
| Henry A. Muhlenberg | Democratic | 8th | March 4, 1853 – January 9, 1854 | Died. |
| Henry A. P. Muhlenberg | Jacksonian | 7th | March 4, 1829 – March 4, 1833 | Resigned to becomeUnited States Minister to the Austrian Empire. |
| 9th | March 4, 1833 – March 4, 1837 | |||
| Democratic | March 4, 1837 – February 8, 1838 | |||
| Peter Muhlenberg | Anti-Administration | At-large | March 4, 1789 – March 4, 1791 | |
| March 4, 1793 – March 4, 1795 | ||||
| Democratic-Republican | 4th | March 4, 1799 – March 4, 1801 | ||
| Michael J. Muldowney | Republican | 32nd | March 4, 1933 – January 3, 1935 | |
| Walter M. Mumma | Republican | 18th | January 3, 1951 – January 3, 1953 | Died. |
| 16th | January 3, 1953 – February 25, 1961 | |||
| Austin J Murphy | Democratic | 22nd | January 3, 1977 – January 3, 1993 | |
| 20th | January 3, 1993 – January 3, 1995 | |||
| John W. Murphy | Democratic | 11th | January 3, 1943 – January 3, 1945 | Resigned to become judge of theUnited States District Court for the Middle District of Pennsylvania. |
| 10th | January 3, 1945 – July 17, 1946 | |||
| Patrick Murphy | Democratic | 8th | January 3, 2007 – January 3, 2011 | Lost re-election. |
| Timothy F. Murphy | Republican | 18th | January 3, 2003 – October 21, 2017 | Resigned. |
| John Murray | Democratic-Republican | 10th | October 14, 1817 – March 4, 1821 | First elected to finish Representative-electDavid Scott's term. |
| Thomas Murray, Jr. | Democratic-Republican | 10th | October 9, 1821 – March 4, 1823 | First elected to finish Representative-electWilliam Cox Ellis's term. |
| John Murtha | Democratic | 12th | February 5, 1974 – February 8, 2010 | Died. |
| Ray Musto | Democratic | 11th | April 9, 1980 – January 3, 1981 | |
| Howard Mutchler | Democratic | 8th | August 7, 1893 – March 4, 1895 | |
| March 4, 1901 – March 4, 1903 | ||||
| William Mutchler | Democratic | 10th | March 4, 1875 – March 4, 1877 | |
| March 4, 1881 – March 4, 1885 | ||||
| 8th | March 4, 1889 – June 23, 1893 | Died. | ||
| Amos Myers | Republican | 20th | March 4, 1863 – March 4, 1865 | |
| Francis J. Myers | Democratic | 6th | January 3, 1939 – January 3, 1945 | |
| Gary A. Myers | Republican | 25th | January 3, 1975 – January 3, 1979 | |
| Leonard Myers | Republican | 3rd | March 4, 1863 – March 4, 1869 | |
| April 9, 1869 – March 4, 1875 | Successfully challenged election ofJohn Moffet. | |||
| Michael Myers | Democratic | 1st | November 2, 1976 – October 2, 1980 | Expelled as a result of theAbscam scandal. |
| Charles Naylor | Whig | 3rd | June 29, 1837 – March 4, 1841 | First elected to finish Representative-electFrancis J. Harper's term. |
| James S. Negley | Republican | 22nd | March 4, 1869 – March 4, 1875 | |
| March 4, 1885 – March 4, 1887 | ||||
| James L. Nelligan | Republican | 11th | January 3, 1981 – January 3, 1983 | |
| Henry Nes | Independent Democratic | 15th | March 4, 1843 – March 4, 1845 | |
| Whig | March 4, 1847 – September 10, 1850 | Died. | ||
| Peter Newhard | Democratic | 8th | March 4, 1839 – March 4, 1843 | |
| Thomas D. Nicholls | Independent Democratic | 10th | March 4, 1907 – March 4, 1911 | |
| Robert N.C. Nix, Sr. | Democratic | 4th | May 20, 1958 – January 3, 1963 | |
| 2nd | January 3, 1963 – January 3, 1979 | |||
| Solomon T. North | Republican | 27th | March 4, 1915 – March 4, 1917 | |
| Charles O'Neill | Republican | 2nd | March 4, 1863 – March 4, 1871 | |
| March 4, 1873 – November 25, 1893 | Died. | |||
| Harry P. O'Neill | Democratic | 10th | January 3, 1949 – January 3, 1953 | |
| Alexander Ogle | Democratic-Republican | 8th | March 4, 1817 – March 4, 1819 | |
| Andrew J. Ogle | Whig | 18th | March 4, 1849 – March 4, 1851 | |
| Charles Ogle | Anti-Masonic | 18th | March 4, 1837 – March 4, 1841 | |
| Whig | March 4, 1841 – May 10, 1841 | Died. | ||
| Marlin E Olmsted | Republican | 14th | March 4, 1897 – March 4, 1903 | |
| 18th | March 4, 1903 – March 4, 1913 | |||
| Robert Orr, Jr. | Jacksonian | 16th | October 11, 1825 – March 4, 1829 | |
| Edwin S Osborne | Republican | At-large | March 4, 1885 – March 4, 1889 | |
| 12th | March 4, 1889 – March 4, 1891 | |||
| James H. Osmer | Republican | 27th | March 4, 1879 – March 4, 1881 | |
| Edward Overton, Jr. | Republican | 15th | March 4, 1877 – March 4, 1881 | |
| Asa Packer | Democratic | 13th | March 4, 1853 – March 4, 1857 | |
| Horace B. Packer | Republican | 16th | March 4, 1897 – March 4, 1901 | |
| John B. Packer | Republican | 14th | March 4, 1869 – March 4, 1877 | |
| A. Mitchell Palmer | Democratic | 26th | March 4, 1909 – March 4, 1915 | |
| Cyrus M. Palmer | Republican | 13th | March 4, 1927 – March 4, 1929 | |
| Henry W Palmer | Republican | 12th | March 4, 1901 – March 4, 1903 | |
| 11th | March 4, 1903 – March 4, 1907 | |||
| March 4, 1909 – March 4, 1911 | ||||
| Andrew Parker | Democratic | 17th | March 4, 1851 – March 4, 1853 | |
| George R Patterson | Republican | 13th | March 4, 1901 – March 4, 1903 | Died. |
| 12th | March 4, 1903 – March 21, 1906 | |||
| Thomas Patterson | Democratic-Republican | 12th | March 4, 1817 – March 4, 1823 | |
| 15th | March 4, 1823 – March 4, 1825 | |||
| Charles E. Patton | Republican | 21st | March 4, 1911 – March 4, 1915 | |
| John Patton | Republican | 24th | March 4, 1861 – March 4, 1863 | |
| 20th | March 4, 1887 – March 4, 1889 | |||
| John D. Patton | Democratic | 25th | March 4, 1883 – March 4, 1885 | |
| Levi Pawling | Federalist | 2nd | March 4, 1807 – March 4, 1811 | |
| Lemuel Paynter | Democratic | 1st | March 4, 1837 – March 4, 1841 | |
| John J. Pearce | Opposition | 15th | March 4, 1855 – March 4, 1857 | |
| John J. Pearson | Anti-Jacksonian | 24th | December 5, 1836 – March 4, 1837 | |
| Scott Perry | Republican | 4th | January 3, 2012 – January 3, 2019 | Redistricted. |
| 10th | January 3, 2019 – present | Incumbent | ||
| John E. Peterson | Republican | 5th | January 3, 1997 – January 3, 2009 | |
| David Petrikin | Democratic | 15th | March 4, 1837 – March 4, 1841 | |
| S. Newton Pettis | Republican | 20th | December 7, 1868 – March 4, 1869 | |
| Darwin Phelps | Republican | 23rd | March 4, 1869 – March 4, 1871 | |
| Henry M. Phillips | Democratic | 4th | March 4, 1857 – March 4, 1859 | |
| John Phillips | Federalist | 3rd | March 4, 1821 – March 4, 1823 | |
| Thomas W. Phillips | Republican | 25th | March 4, 1893 – March 4, 1897 | |
| Thomas Wharton Phillips Jr. | Republican | 26th | March 4, 1923 – March 4, 1927 | |
| Robert Philson | Democratic-Republican | 8th | March 4, 1819 – March 4, 1821 | |
| William Piper | Democratic-Republican | 7th | March 4, 1811 – March 4, 1813 | |
| 8th | March 4, 1813 – March 4, 1817 | |||
| Charles W. Pitman | Whig | 14th | March 4, 1849 – March 4, 1851 | |
| Joseph R. Pitts | Republican | 16th | January 3, 1997 – January 3, 2017 | |
| Todd R. Platts | Republican | 19th | January 3, 2001 – January 3, 2013 | Retired. |
| Arnold Plumer | Democratic | 25th | March 4, 1837 – March 4, 1839 | |
| March 4, 1841 – March 4, 1843 | ||||
| George Plumer | Democratic-Republican | 11th | March 4, 1821 – March 4, 1823 | |
| 17th | March 4, 1823 – March 4, 1825 | |||
| Jacksonian | March 4, 1825 – March 4, 1827 | |||
| Rufus K. Polk | Democratic | 17th | March 4, 1899 – March 5, 1902 | Died. |
| James Pollock | Whig | 13th | April 5, 1844 – March 4, 1849 | |
| Henry K. Porter | Independent Republican | 31st | March 4, 1903 – March 4, 1905 | |
| John Porter | Democratic-Republican | 1st | December 8, 1806 – March 4, 1811 | |
| Stephen G. Porter | Republican | 29th | March 4, 1911 – March 4, 1923 | Died. |
| 32nd | March 4, 1923 – June 27, 1930 | |||
| George A. Post | Democratic | 15th | March 4, 1883 – March 4, 1885 | |
| William W. Potter | Democratic | 14th | March 4, 1837 – October 28, 1839 | Died. |
| David Potts Jr. | Anti-Masonic | 4th | March 4, 1831 – March 4, 1839 | |
| Joseph Powell | Democratic | 15th | March 4, 1875 – March 4, 1877 | |
| C. Frederick Pracht | Republican | 5th | January 3, 1943 – January 3, 1945 | |
| Charles C. Pratt | Republican | 14th | March 4, 1909 – March 4, 1911 | |
| Joseph M. Pratt | Republican | 2nd | January 18, 1944 – January 3, 1945 | |
| Stanley A. Prokop | Democratic | 10th | January 3, 1959 – January 3, 1961 | |
| John Pugh | Democratic-Republican | 2nd | March 4, 1805 – March 4, 1809 | |
| Samuel A Purviance | Opposition | 22nd | March 4, 1855 – March 4, 1857 | |
| Republican | March 4, 1857 – March 4, 1859 | |||
| James M. Quigley | Democratic | 19th | January 3, 1955 – January 3, 1957 | |
| January 3, 1959 – January 3, 1961 | ||||
| James L. Quinn | Democratic | 31st | January 3, 1935 – January 3, 1939 | |
| Alexander Ramsey | Whig | 14th | March 4, 1843 – March 4, 1847 | |
| Robert Ramsey | Jacksonian | 6th | March 4, 1833 – March 4, 1835 | |
| Whig | March 4, 1841 – March 4, 1843 | |||
| William Ramsey | Jacksonian | 11th | March 4, 1827 – September 29, 1831 | Died. |
| William S. Ramsey | Democratic | 13th | March 4, 1839 – October 17, 1840 | Died. |
| Samuel J. Randall | Democratic | 1st | March 4, 1863 – March 4, 1875 | Died. |
| 3rd | March 4, 1875 – April 13, 1890 | |||
| Harry C. Ransley | Republican | 3rd | November 2, 1920 – March 4, 1933 | |
| 1st | March 4, 1933 – January 3, 1937 | |||
| Joseph W. Ray | Republican | 24th | March 4, 1889 – March 4, 1891 | |
| John Rea | Democratic-Republican | 5th | May 11, 1813 – March 4, 1815 | |
| Almon H Read | Democratic | 17th | March 18, 1842 – March 4, 1843 | Died. |
| 12th | March 4, 1843 – June 3, 1844 | |||
| John R. Reading | Democratic | 5th | March 4, 1869 – April 13, 1870 | Lost contested election toCaleb N. Taylor |
| John Reber | Republican | 12th | May 23, 1919 – March 4, 1923 | |
| Charles M. Reed | Whig | 23rd | March 4, 1843 – March 4, 1845 | |
| Robert R. Reed | Whig | 20th | March 4, 1849 – March 4, 1851 | |
| James B Reilly | Democratic | 13th | March 4, 1875 – March 4, 1879 | |
| March 4, 1889 – March 4, 1895 | ||||
| John Reilly | Democratic | 17th | March 4, 1875 – March 4, 1877 | |
| Wilson Reilly | Democratic | 17th | March 4, 1857 – March 4, 1859 | |
| Luther Reily | Democratic | 10th | March 4, 1837 – March 4, 1839 | |
| Guy Reschenthaler | Republican | 14th | January 3, 2019 – present | Incumbent |
| John E. Reyburn | Republican | 4th | February 18, 1890 – March 4, 1897 | |
| 2nd | November 6, 1906 – March 31, 1907 | Resigned to becomeMayor of Philadelphia. | ||
| William S. Reyburn | Republican | 2nd | May 23, 1911 – March 4, 1913 | |
| John M. Reynolds | Republican | 19th | March 4, 1905 – January 17, 1911 | Resigned to becomeLieutenant Governor of Pennsylvania. |
| George M. Rhodes | Democratic | 13th | January 3, 1949 – January 3, 1953 | |
| 14th | January 3, 1953 – January 3, 1963 | |||
| 6th | January 3, 1963 – January 3, 1969 | |||
| Robert F. Rich | Republican | 16th | November 4, 1930 – January 3, 1943 | |
| 15th | January 3, 1945 – January 3, 1951 | |||
| Jacob Richards | Democratic-Republican | 1st | March 4, 1803 – March 4, 1809 | |
| John Richards | Democratic-Republican | 4th | March 4, 1795 – March 4, 1797 | |
| Matthias Richards | Democratic-Republican | 3rd | March 4, 1807 – March 4, 1811 | |
| William E. Richardson | Democratic | 14th | March 4, 1933 – January 3, 1937 | |
| Hiram L. Richmond | Republican | 20th | March 4, 1873 – March 4, 1875 | |
| Tom Ridge | Republican | 21st | January 3, 1983 – January 3, 1995 | |
| John W. Rife | Republican | 14th | March 4, 1889 – March 4, 1893 | |
| David Ritchie | Whig | 21st | March 4, 1853 – March 4, 1855 | |
| Opposition | March 4, 1855 – March 4, 1857 | |||
| Republican | March 4, 1857 – March 4, 1859 | |||
| Donald L. Ritter | Republican | 15th | January 3, 1979 – January 3, 1993 | |
| John Ritter | Democratic | 9th | March 4, 1843 – March 4, 1847 | |
| Edward E Robbins | Republican | 21st | March 4, 1897 – March 4, 1899 | |
| 22nd | March 4, 1917 – January 25, 1919 | Died. | ||
| John Robbins | Democratic | 4th | March 4, 1849 – March 4, 1853 | |
| 3rd | March 4, 1853 – March 4, 1855 | |||
| 5th | March 4, 1875 – March 4, 1877 | |||
| Anthony E Roberts | Know Nothing | 9th | March 4, 1855 – March 4, 1857 | |
| Republican | March 4, 1857 – March 4, 1859 | |||
| Jonathan Roberts | Democratic-Republican | 2nd | March 4, 1811 – February 24, 1814 | Resigned after being elected to theUS Senate. |
| John B. Robinson | Republican | 6th | March 4, 1891 – March 4, 1897 | |
| David F. Robison | Opposition | 17th | March 4, 1855 – March 4, 1857 | |
| Robert L. Rodgers | Republican | 29th | January 3, 1939 – January 3, 1945 | |
| 28th | January 3, 1945 – January 3, 1947 | |||
| William Rodman | Democratic-Republican | 2nd | March 4, 1811 – March 4, 1813 | |
| Thomas J Rogers | Democratic-Republican | 6th | March 3, 1818 – March 4, 1823 | |
| 8th | March 4, 1823 – April 20, 1824 | Resigned. | ||
| Fred B. Rooney | Democratic | 15th | July 30, 1963 – January 3, 1979 | |
| John M. Rose | Republican | 19th | March 4, 1917 – March 4, 1923 | |
| John Ross | Democratic-Republican | 2nd | March 4, 1809 – March 4, 1811 | |
| 6th | March 4, 1815 – February 24, 1818 | Resigned to become president judge of the seventh judicial district of Pennsylvania. | ||
| Sobieski Ross | Republican | 18th | March 4, 1873 – March 4, 1875 | |
| 16th | March 4, 1875 – March 4, 1877 | |||
| Thomas Ross | Democratic | 6th | March 4, 1849 – March 4, 1853 | |
| John H. Rothermel | Democratic | 13th | March 4, 1907 – March 4, 1915 | |
| Keith Rothfus | Republican | 12th | January 3, 2013 – January 3, 2019 | Lost re-election. |
| Charles H. Rowland | Republican | 21st | March 4, 1915 – March 4, 1919 | |
| Arthur R. Rupley | Republican | At-large | March 4, 1913 – March 4, 1915 | |
| James M. Russell | Whig | 18th | December 21, 1841 – March 4, 1843 | |
| Samuel L. Russell | Whig | 17th | March 4, 1853 – March 4, 1855 | |
| Albert G. Rutherford | Republican | 15th | January 3, 1937 – August 10, 1941 | Died. |
| James W. Ryan | Democratic | 13th | March 4, 1899 – March 4, 1901 | |
| John W. Ryon | Democratic | 13th | March 4, 1879 – March 4, 1881 | |
| Leon Sacks | Democratic | 1st | January 3, 1937 – January 3, 1943 | |
| Edmund W. Samuel | Republican | 16th | March 4, 1905 – March 4, 1907 | |
| Rick Santorum | Republican | 18th | January 3, 1991 – January 3, 1995 | |
| George W. Sarbacher Jr. | Republican | 5th | January 3, 1947 – January 3, 1949 | |
| Benjamin Say | Democratic-Republican | 1st | November 16, 1808 – June 1809 | Resigned. |
| John P. Saylor | Republican | 26th | September 13, 1949 – January 3, 1953 | |
| 22nd | January 3, 1953 – January 3, 1973 | |||
| 12th | January 3, 1973 – October 28, 1973 | |||
| Mary Gay Scanlon | Democratic | 7th | November 6, 2018 – January 3, 2019 | Redistricted. |
| 5th | January 3, 2019 – present | Incumbent | ||
| Thomas E. Scanlon | Democratic | 30th | January 3, 1941 – January 3, 1943 | |
| 16th | January 3, 1943 – January 3, 1945 | |||
| Gustav A. Schneebeli | Republican | 26th | March 4, 1905 – March 4, 1907 | |
| Herman T. Schneebeli | Republican | 17th | April 26, 1960 – January 3, 1977 | |
| Dick Schulze | Republican | 5th | January 3, 1975 – January 3, 1993 | |
| Allyson Schwartz | Democratic | 13th | January 3, 2005 – January 3, 2015 | Retired. |
| John Schwartz | Democratic | 8th | March 4, 1859 – June 20, 1860 | Died. |
| Richard S. Schweiker | Republican | 13th | January 3, 1961 – January 3, 1969 | |
| James P. Scoblick | Republican | 10th | November 5, 1946 – January 3, 1949 | |
| Glenni William Scofield | Republican | 19th | March 4, 1863 – March 4, 1873 | |
| At-large | March 4, 1873 – March 4, 1875 | |||
| Hardie Scott | Republican | 3rd | January 3, 1947 – January 3, 1953 | |
| Hugh Scott | Republican | 7th | January 3, 1941 – January 3, 1945 | Lost re-election. |
| 6th | January 3, 1947 – January 3, 1959 | Retired torun for United States Senator. | ||
| John R. K. Scott | Republican | At-large | March 4, 1915 – January 5, 1919 | Resigned. |
| John Scott | Jacksonian | 12th | March 4, 1829 – March 4, 1831 | |
| Thomas Scott | Pro-Administration | At-large | March 4, 1789 – March 4, 1791 | |
| March 4, 1793 – March 4, 1795 | ||||
| William Lawrence Scott | Democratic | 27th | March 4, 1885 – March 4, 1889 | |
| George W. Scranton | Republican | 12th | March 4, 1859 – March 24, 1861 | Died. |
| Joseph A. Scranton | Republican | 12th | March 4, 1881 – March 4, 1883 | |
| March 4, 1885 – March 4, 1887 | ||||
| 11th | March 4, 1889 – March 4, 1891 | |||
| March 4, 1893 – March 4, 1897 | ||||
| William Scranton | Republican | 10th | January 3, 1961 – January 3, 1963 | |
| Edward Scull | Republican | 17th | March 4, 1887 – March 4, 1889 | |
| 20th | March 4, 1889 – March 4, 1893 | |||
| John Sergeant | Federalist | 1st | October 10, 1815 – March 4, 1823 | |
| Anti-Jacksonian | 2nd | March 4, 1827 – March 4, 1829 | ||
| Whig | March 4, 1835 – September 15, 1841 | Resigned. | ||
| Joe Sestak | Democratic | 7th | January 3, 2007 – January 3, 2011 | Retired. |
| Adam Seybert | Democratic-Republican | 1st | October 10, 1809 – March 4, 1815 | |
| March 4, 1817 – March 4, 1819 | ||||
| William S. Shallenberger | Republican | 24th | March 4, 1877 – March 4, 1883 | |
| James Sheakley | Democratic | 26th | March 4, 1875 – March 4, 1877 | |
| Daniel Sheffer | Democratic | 12th | March 4, 1837 – March 4, 1839 | |
| John E. Sheridan | Democratic | 4th | November 7, 1939 – January 3, 1947 | |
| Don Sherwood | Republican | 10th | January 3, 1999 – January 3, 2007 | |
| Henry Sherwood | Democratic | 18th | March 4, 1871 – March 4, 1873 | |
| George Shiras III | Independent Republican | 29th | March 4, 1903 – March 4, 1905 | |
| Lazarus D. Shoemaker | Republican | 12th | March 4, 1871 – March 4, 1875 | |
| George W. Shonk | Republican | 12th | March 4, 1891 – March 4, 1893 | |
| Joseph B. Showalter | Republican | 25th | April 20, 1897 – March 4, 1903 | |
| Milton W Shreve | Republican | 25th | March 4, 1913 – March 4, 1915 | |
| March 4, 1919 – March 4, 1921 | ||||
| Independent Republican | March 4, 1921 – March 4, 1923 | |||
| Republican | 29th | March 4, 1923 – March 4, 1933 | ||
| Joseph H. Shull | Democratic | 26th | March 4, 1903 – March 4, 1905 | |
| Elmer "Bud" Shuster | Republican | 9th | January 3, 1973 – February 3, 2001 | Resigned. |
| William "Bill" Shuster | Republican | 9th | May 15, 2001 – January 3, 2019 | Retired. |
| Joseph C. Sibley | Democratic | 26th | March 4, 1893 – March 4, 1895 | |
| 27th | March 4, 1899 – March 4, 1901 | |||
| Republican | March 4, 1901 – March 4, 1903 | |||
| 28th | March 4, 1903 – March 4, 1907 | |||
| Thomas H Sill | Anti-Jacksonian | 18th | January 13, 1826 – March 4, 1827 | |
| Anti-Jacksonian | March 4, 1829 – March 4, 1831 | |||
| William Simonton | Whig | 10th | March 4, 1839 – March 4, 1843 | |
| Richard M. Simpson | Republican | 18th | May 11, 1937 – January 3, 1945 | Died. |
| 17th | January 3, 1945 – January 3, 1953 | |||
| 18th | January 3, 1953 – January 7, 1960 | |||
| William A. Sipe | Democratic | 24th | December 5, 1892 – March 4, 1895 | |
| Frank C. Sites | Democratic | 19th | March 4, 1923 – March 4, 1925 | |
| Samuel Sitgreaves | Federalist | 4th | March 4, 1795 – ????, 1798 | Resigned. |
| Edward L. Sittler Jr. | Republican | 23rd | January 3, 1951 – January 3, 1953 | |
| Amos Slaymaker | Federalist | 3rd | October 11, 1814 – March 4, 1815 | |
| John Smilie | Anti-Administration | At-large | March 4, 1793 – March 4, 1795 | |
| 11th | March 4, 1799 – March 4, 1803 | |||
| 9th | March 4, 1803 – December 30, 1812 | Died. | ||
| A. Herr Smith | Republican | 9th | March 4, 1873 – March 4, 1885 | |
| Francis R. Smith | Democratic | 5th | January 3, 1941 – January 3, 1943 | |
| George Smith | Democratic-Republican | 5th | March 4, 1809 – March 4, 1813 | |
| Isaac Smith | Democratic-Republican | 10th | March 4, 1813 – March 4, 1815 | |
| John T. Smith | Democratic | 3rd | March 4, 1843 – March 4, 1845 | |
| Joseph F. Smith | Democratic | 3rd | July 21, 1981 – January 3, 1983 | |
| Samuel A. Smith | Jacksonian | 8th | October 13, 1829 – March 4, 1833 | |
| Samuel Smith | Democratic-Republican | 11th | November 7, 1805 – March 4, 1811 | |
| Thomas Smith | Federalist | 1st | March 4, 1815 – March 4, 1817 | |
| William O. Smith | Republican | 27th | March 4, 1903 – March 4, 1907 | |
| Lloyd Smucker | Republican | 16th | January 3, 2017 – January 3, 2019 | Redistricted. |
| 11th | January 3, 2019 – present | Incumbent | ||
| J. Buell Snyder | Democratic | 24th | March 4, 1933 – January 3, 1945 | Died. |
| 23rd | January 3, 1945 – February 24, 1946 | |||
| John Snyder | Democratic | 16th | March 4, 1841 – March 4, 1843 | |
| William H. Sowden | Democratic | 10th | March 4, 1885 – March 4, 1889 | |
| Jacob Spangler | Democratic-Republican | 4th | March 4, 1817 – April 20, 1818 | Resigned to become Surveyor-General of Pennsylvania. |
| Peter M. Speer | Republican | 28th | March 4, 1911 – March 4, 1913 | |
| Robert M. Speer | Democratic | 17th | March 4, 1871 – March 4, 1875 | |
| Michael J. Stack | Democratic | 6th | January 3, 1935 – January 3, 1939 | |
| James A. Stahle | Republican | 19th | March 4, 1895 – March 4, 1897 | |
| William H. Stanton | Democratic | 12th | November 7, 1876 – March 4, 1877 | |
| S. Walter Stauffer | Republican | 19th | January 3, 1953 – January 3, 1955 | |
| January 3, 1957 – January 3, 1959 | ||||
| Henry J. Steele | Democratic | 26th | March 4, 1915 – March 4, 1921 | |
| William Stenger | Democratic | 18th | March 4, 1875 – March 4, 1879 | |
| Philander Stephens | Jacksonian | 9th | March 4, 1829 – March 4, 1833 | |
| John B. Sterigere | Jacksonian | 5th | March 4, 1827 – March 4, 1831 | |
| Bruce F. Sterling | Democratic | 23rd | March 4, 1917 – March 4, 1919 | |
| Thaddeus Stevens | Whig | 8th | March 4, 1849 – March 4, 1853 | |
| Republican | 9th | March 4, 1859 – August 11, 1868 | Died. | |
| James S. Stevenson | Jacksonian | 16th | March 4, 1825 – March 4, 1829 | |
| Andrew Stewart | Democratic-Republican | 13th | March 4, 1821 – March 4, 1823 | |
| 14th | March 4, 1823 – March 4, 1825 | |||
| Jacksonian | March 4, 1825 – March 4, 1827 | |||
| Anti-Jacksonian | March 4, 1827 – March 4, 1829 | |||
| Anti-Masonic | March 4, 1831 – March 4, 1833 | |||
| 20th | March 4, 1833 – March 4, 1835 | |||
| Whig | 18th | March 4, 1843 – March 4, 1849 | ||
| Andrew Stewart | Republican | 24th | March 4, 1891 – February 26, 1892 | Lost contested election |
| John Stewart | Democratic-Republican | 8th | January 15, 1801 – March 4, 1803 | |
| 6th | March 4, 1803 – March 4, 1805 | |||
| William Stewart | Republican | 23rd | March 4, 1857 – March 4, 1861 | |
| John D Stiles | Democratic | 7th | June 3, 1862 – March 4, 1863 | |
| 6th | March 4, 1863 – March 4, 1865 | |||
| March 4, 1869 – March 4, 1871 | ||||
| Edward L. Stokes | Republican | 2nd | November 3, 1931 – March 4, 1933 | |
| 6th | March 4, 1933 – January 3, 1935 | |||
| Charles W. Stone | Republican | 27th | November 4, 1890 – March 4, 1899 | |
| William A. Stone | Republican | 23rd | March 4, 1891 – November 8, 1898 | Resigned to becomeGovernor of Pennsylvania. |
| John B Storm | Democratic | 11th | March 4, 1871 – March 4, 1875 | |
| March 4, 1883 – March 4, 1887 | ||||
| Christian M. Straub | Democratic | 11th | March 4, 1853 – March 4, 1855 | |
| James D. Strawbridge | Republican | 13th | March 4, 1873 – March 4, 1875 | |
| John Strohm | Whig | 8th | March 4, 1845 – March 4, 1849 | |
| Nathan L. Strong | Republican | 27th | March 4, 1917 – January 3, 1935 | |
| William Strong | Democratic | 9th | March 4, 1847 – March 4, 1851 | |
| Myer Strouse | Democratic | 10th | March 4, 1863 – March 4, 1867 | |
| Howard W. Stull | Republican | 20th | April 26, 1932 – March 4, 1933 | |
| John C. Sturtevant | Republican | 26th | March 4, 1897 – March 4, 1899 | |
| Patrick J. Sullivan | Republican | 34th | March 4, 1929 – March 4, 1933 | |
| Joel B. Sutherland | Jacksonian | 1st | March 4, 1827 – March 4, 1837 | |
| John Swanwick | Democratic-Republican | 1st | March 4, 1795 – August 1, 1798 | Died. |
| Joshua W. Swartz | Republican | 19th | March 4, 1925 – March 4, 1927 | |
| J. Howard Swick | Republican | 26th | March 4, 1927 – January 3, 1935 | |
| William I. Swoope | Republican | 23rd | March 4, 1923 – March 4, 1927 | |
| Guy J. Swope | Democratic | 19th | January 3, 1937 – January 3, 1939 | |
| John A Swope | Democratic | 19th | December 23, 1884 – March 4, 1885 | |
| November 3, 1885 – March 4, 1887 | ||||
| Adamson Tannehill | Democratic-Republican | 14th | March 4, 1813 – March 4, 1815 | |
| Christian Tarr | Democratic-Republican | 13th | March 4, 1817 – March 4, 1821 | |
| Alexander W. Taylor | Republican | 21st | March 4, 1873 – March 4, 1875 | |
| Caleb N Taylor | Republican | 5th | March 4, 1867 – March 4, 1869 | |
| April 13, 1870 – March 4, 1871 | Successfully contested the election ofJohn R. Reading. | |||
| Henry W Temple | Progressive | 24th | March 4, 1913 – March 4, 1915 | |
| Republican | November 2, 1915 – March 4, 1923 | Elected to finish the term of Representative-electWilliam M. Brown. | ||
| 25th | March 4, 1923 – March 4, 1933 | |||
| Thomas W. Templeton | Republican | 11th | March 4, 1917 – March 4, 1919 | |
| John K. Tener | Republican | 24th | March 4, 1909 – January 16, 1911 | Resigned to becomeGovernor of Pennsylvania. |
| Martin R. Thayer | Republican | 5th | March 4, 1863 – March 4, 1867 | |
| Richard Thomas | Federalist | 3rd | March 4, 1795 – March 4, 1801 | |
| Glenn G. T. Thompson | Republican | 5th | January 3, 2009 – January 3, 2019 | Redistricted. |
| 15th | January 3, 2019 – present | Incumbent | ||
| James Thompson | Democratic | 23rd | March 4, 1845 – March 4, 1851 | |
| John M. Thompson | Republican | 23rd | ???? – March 4, 1875 | |
| 26th | March 4, 1877 – March 4, 1879 | |||
| Alexander Thomson | Democratic-Republican | 13th | December 6, 1824 – March 4, 1825 | Resigned. |
| Jacksonian | March 4, 1825 – May 1, 1826 | |||
| Joseph E. Thropp | Republican | 20th | March 4, 1899 – March 4, 1901 | |
| Harve Tibbott | Republican | 27th | January 3, 1939 – January 3, 1945 | |
| 26th | January 3, 1945 – January 3, 1949 | |||
| John Tod | Democratic-Republican | 8th | March 4, 1821 – March 4, 1823 | Resigned after becoming judge of the Court of Common Pleas for the 16th judicial district. |
| 13th | March 4, 1823 – ????, 1824 | |||
| Lemuel Todd | Opposition | 16th | March 4, 1855 – March 4, 1857 | |
| Republican | At-large | March 4, 1873 – March 4, 1875 | ||
| George W. Toland | Whig | 2nd | March 4, 1837 – March 4, 1843 | |
| Herman Toll | Democratic | 6th | January 3, 1959 – January 3, 1963 | |
| 4th | January 3, 1963 – January 3, 1967 | |||
| Pat Toomey | Republican | 15th | January 3, 1999 – January 3, 2005 | Retired torun for United States Senator. |
| Charles C. Townsend | Republican | 25th | March 4, 1889 – March 4, 1891 | |
| Washington Townsend | Republican | 7th | March 4, 1869 – March 4, 1875 | |
| 6th | March 4, 1875 – March 4, 1877 | |||
| Henry W. Tracy | Independent Republican | 13th | March 4, 1863 – March 4, 1865 | |
| Michael C. Trout | Democratic | 23rd | March 4, 1853 – March 4, 1855 | |
| William I. Troutman | Republican | At-large | January 3, 1943 – January 2, 1945 | Resigned to become member ofPennsylvania State Senate. |
| Jacob Turney | Democratic | 21st | March 4, 1875 – March 4, 1879 | |
| C. Murray Turpin | Republican | 12th | June 24, 1929 – January 3, 1937 | |
| Job R. Tyson | Whig | 2nd | March 4, 1855 – March 4, 1857 | |
| Daniel Udree | Democratic-Republican | 7th | October 12, 1813 – March 4, 1815 | |
| December 26, 1820 – March 4, 1821 | ||||
| December 10, 1822 – March 4, 1825 | ||||
| Daniel M. Van Auken | Democratic | 11th | March 4, 1867 – March 4, 1871 | |
| Espy Van Horne | Jacksonian | 9th | March 4, 1825 – March 4, 1829 | |
| Isaac Van Horne | Democratic-Republican | 4th | March 4, 1801 – March 4, 1803 | |
| 2nd | March 4, 1803 – March 4, 1805 | |||
| James E. Van Zandt | Republican | 23rd | January 3, 1939 – September 24, 1943 | Resigned to join theUnited States Navy. |
| 22nd | January 3, 1947 – January 3, 1953 | |||
| 20th | January 3, 1953 – January 3, 1963 | |||
| William S. Vare | Republican | 1st | May 24, 1912 – March 4, 1927 | |
| Albert C. Vaughn | Republican | 8th | January 3, 1951 – September 1, 1951 | Died. |
| Richard Vaux | Democratic | 3rd | May 20, 1890 – March 4, 1891 | |
| John P. Verree | Republican | 3rd | March 4, 1859 – March 4, 1863 | |
| Joseph P. Vigorito | Democratic | 24th | January 3, 1965 – January 3, 1977 | |
| David D Wagener | Jacksonian | 7th | March 4, 1833 – March 4, 1837 | |
| Democratic | March 4, 1837 – March 4, 1841 | |||
| Alfred M. Waldron | Republican | 3rd | March 4, 1933 – January 3, 1935 | |
| Doug Walgren | Democratic | 18th | January 3, 1977 – January 3, 1991 | |
| Robert J. C. Walker | Republican | 16th | March 4, 1881 – March 4, 1883 | |
| Robert S. Walker | Republican | 16th | January 3, 1977 – January 3, 1997 | |
| James M. Wallace | Democratic-Republican | 3rd | October 10, 1815 – March 4, 1821 | First elected to finish Representative-electAmos Ellmaker's term. |
| John W Wallace | Republican | 23rd | March 4, 1861 – March 4, 1863 | |
| 24th | March 4, 1875 – March 4, 1877 | |||
| Robert Waln | Federalist | 1st | December 3, 1798 – March 4, 1801 | |
| Francis E. Walter | Democratic | 21st | March 4, 1933 – January 3, 1945 | Died. |
| 20th | January 3, 1945 – January 3, 1953 | |||
| 15th | January 3, 1953 – May 31, 1963 | |||
| Anderson H Walters | Republican | At-large | March 4, 1913 – March 4, 1915 | |
| March 4, 1919 – March 4, 1923 | ||||
| 20th | March 4, 1925 – March 4, 1927 | |||
| Irving P Wanger | Republican | 7th | March 4, 1893 – March 4, 1903 | Lost re-election. |
| 8th | March 4, 1903 – March 4, 1911 | |||
| William Ward | Republican | 6th | March 4, 1877 – March 4, 1883 | |
| John H. Ware III | Republican | 5th | March 4, 1973 – January 3, 1975 | |
| George Watkins | Republican | 7th | January 3, 1965 – January 3, 1967 | Died. |
| 9th | January 3, 1967 – August 7, 1970 | |||
| John G. Watmough | Anti-Jacksonian | 3rd | March 4, 1831 – March 4, 1835 | |
| Laurence H. Watres | Republican | 11th | March 4, 1923 – March 4, 1931 | |
| Henry W Watson | Republican | 8th | March 4, 1915 – March 4, 1923 | Died. |
| 9th | March 4, 1923 – August 27, 1933 | |||
| Lewis F Watson | Republican | 27th | March 4, 1877 – March 4, 1879 | |
| March 4, 1881 – March 4, 1883 | ||||
| March 4, 1889 – August 25, 1890 | Died. | |||
| Isaac Wayne | Federalist | 4th | March 4, 1823 – March 4, 1825 | |
| James D. Weaver | Republican | 24th | January 3, 1963 – January 3, 1965 | |
| Samuel A. Weiss | Democratic | 31st | January 3, 1941 – January 3, 1943 | Resigned to become judge of court of common pleas ofAllegheny County |
| 30th | January 3, 1943 – January 3, 1945 | |||
| 33rd | January 3, 1945 – January 7, 1946 | |||
| Curt Weldon | Republican | 7th | January 3, 1987 – January 3, 2007 | |
| George A. Welsh | Republican | 6th | March 4, 1923 – May 31, 1932 | Resigned to become a district court judge. |
| George M. Wertz | Republican | 20th | March 4, 1923 – March 4, 1925 | |
| John Westbrook | Democratic | 7th | March 4, 1841 – March 4, 1843 | |
| J. Irving Whalley | Republican | 18th | November 8, 1960 – January 3, 1963 | |
| 12th | January 3, 1963 – January 3, 1973 | |||
| Nelson P. Wheeler | Republican | 28th | March 4, 1907 – March 4, 1911 | |
| Alexander C. White | Republican | 25th | March 4, 1885 – March 4, 1887 | |
| Allison White | Democratic | 15th | March 4, 1857 – March 4, 1859 | |
| Harry White | Republican | 25th | March 4, 1877 – March 4, 1881 | |
| James Whitehill | Democratic-Republican | 3rd | March 4, 1813 – September 1, 1814 | Resigned. |
| John Whitehill | Democratic-Republican | 3rd | March 4, 1803 – March 4, 1807 | |
| Robert Whitehill | Democratic-Republican | 4th | November 7, 1805 – March 4, 1813 | Died. |
| 5th | March 4, 1813 – April 8, 1813 | |||
| John Whiteside | Democratic-Republican | 3rd | March 4, 1815 – March 4, 1819 | |
| David Wilmot | Democratic | 12th | March 4, 1845 – March 4, 1851 | |
| Susan Wild | Democratic | 15th | November 6, 2018 – January 3, 2019 | Redistricted. |
| 7th | January 3, 2019 – January 3, 2025 | Lost re-election | ||
| Jonathan Williams | Democratic-Republican | 1st | March 4, 1815 – May 16, 1815 | Died. |
| Lawrence G. Williams | Republican | 7th | January 3, 1967 – January 3, 1975 | |
| Morgan B. Williams | Republican | 12th | March 4, 1897 – March 4, 1899 | |
| Thomas Williams | Republican | 23rd | March 4, 1863 – March 4, 1869 | |
| Henry Wilson | Democratic-Republican | 7th | March 4, 1823 – March 4, 1825 | |
| Jacksonian | March 4, 1825 – August 24, 1826 | Died. | ||
| James Wilson | Democratic-Republican | 11th | March 4, 1823 – March 4, 1825 | |
| Jacksonian | March 4, 1825 – March 4, 1829 | |||
| John H. Wilson | Democratic | 22nd | March 4, 1919 – March 4, 1921 | |
| Stephen F. Wilson | Republican | 18th | March 4, 1865 – March 4, 1869 | |
| Thomas Wilson | Democratic-Republican | 15th | May 14, 1813 – March 4, 1817 | |
| William Wilson | Democratic-Republican | 10th | March 4, 1815 – March 4, 1819 | |
| William B. Wilson | Democratic | 15th | March 4, 1907 – March 4, 1913 | |
| William H. Wilson | Republican | 2nd | January 3, 1935 – January 3, 1937 | |
| Morgan R. Wise | Democratic | 21st | March 4, 1879 – March 4, 1883 | |
| William H. Witte | Democratic | 4th | March 4, 1853 – March 4, 1855 | |
| George Wolf | Democratic-Republican | 8th | December 9, 1824 – March 4, 1825 | |
| Jacksonian | March 4, 1825 – ????, 1829 | Resigned before the convening of the21st Congress. | ||
| James Wolfenden | Republican | 8th | November 6, 1928 – January 3, 1945 | |
| 7th | January 3, 1945 – January 3, 1947 | |||
| Simon P. Wolverton | Democratic | 17th | March 4, 1891 – March 4, 1895 | |
| Alan Wood Jr. | Republican | 7th | March 4, 1875 – March 4, 1877 | |
| John Wood | Republican | 5th | March 4, 1859 – March 4, 1861 | |
| Henry Woods | Federalist | 10th | March 4, 1799 – March 4, 1803 | |
| John Woods | Federalist | 14th | March 4, 1815 – March 4, 1817 | |
| George W. Woodward | Democratic | 12th | November 21, 1867 – March 4, 1871 | |
| Ephraim M. Woomer | Republican | 14th | March 4, 1893 – March 4, 1897 | |
| Ludwig Worman | Federalist | 7th | March 4, 1821 – October 17, 1822 | Died. |
| Charles F Wright | Republican | 15th | March 4, 1899 – March 4, 1903 | |
| 14th | March 4, 1903 – March 4, 1905 | |||
| Hendrick B Wright | Democratic | 12th | March 4, 1853 – March 4, 1855 | |
| July 4, 1861 – March 4, 1863 | ||||
| March 4, 1877 – March 4, 1879 | ||||
| Greenback | March 4, 1879 – March 4, 1881 | |||
| James A. Wright | Democratic | 34th | January 3, 1941 – January 3, 1943 | |
| 32nd | January 3, 1943 – January 3, 1945 | |||
| Myron B. Wright | Republican | 15th | March 4, 1889 – November 13, 1894 | Died. |
| John Wurts | Jacksonian | 1st | March 4, 1825 – March 4, 1827 | |
| Adam M. Wyant | Republican | 22nd | March 4, 1921 – March 4, 1923 | |
| 31st | March 4, 1923 – March 4, 1933 | |||
| Henry Wynkoop | Pro-Administration | At-large | March 4, 1789 – March 4, 1791 | |
| Robert M. Yardley | Republican | 7th | March 4, 1887 – March 4, 1891 | |
| Gus Yatron | Democratic | 6th | January 3, 1969 – January 3, 1993 | |
| Seth H. Yocum | Greenback | 20th | March 4, 1825 – March 4, 1827 | |
| Jacob S. Yost | Democratic | 5th | March 4, 1843 – March 4, 1847 | |
| James R. Young | Republican | 4th | March 4, 1897 – March 4, 1903 | |
| Edward D. Ziegler | Democratic | 19th | March 4, 1899 – March 4, 1901 | unsuccessful candidate for renomination |
