SinceIowa became a U.S. state in 1846, it has sentcongressional delegations to theUnited States Senate andUnited States House of Representatives. Each state elects two senators to serve for six years, and members of the House to two-year terms. Before becoming a state, theIowa Territory elected a non-voting delegate at-large to Congress from 1838 to 1846.
These are tables of congressional delegations from Iowa to the United States Senate and the United States House of Representatives.[1]
| Current U.S. senators from Iowa | ||||
|---|---|---|---|---|
Iowa
| Class II senator | Class III senator | ||
.jpg) Joni Ernst (Junior senator) (Red Oak) |  Chuck Grassley (Senior senator) (New Hartford) | |||
| Party | Republican | Republican | ||
| Incumbent since | January 3, 2015 | January 3, 1981 | ||
Iowa's current congressional delegation in the119th Congress consists of its two senators and four representatives, allRepublicans.
The current dean of the Iowa delegation is Senator andPresident pro tempore of the United States SenateChuck Grassley, having served in the Senate since 1981 and in Congress since 1975.
| Current U.S. representatives from Iowa | |||||
|---|---|---|---|---|---|
| District | Member (Residence)[3] | Party | Incumbent since | CPVI (2025)[4] | District map |
| 1st |  Mariannette Miller-Meeks (Davenport) | Republican | January 3, 2021 | R+4 | .svg) |
| 2nd |  Ashley Hinson (Marion) | Republican | January 3, 2021 | R+4 | .svg) |
| 3rd | .jpg) Zach Nunn (Bondurant) | Republican | January 3, 2023 | R+2 | .svg) |
| 4th |  Randy Feenstra (Hull) | Republican | January 3, 2021 | R+15 | .svg) |
| Class II senator | Congress | Class III senator | ||
|---|---|---|---|---|
| George Wallace Jones (D) | 30th(1847–1849) | Augustus C. Dodge (D) | ||
| 31st(1849–1851) | ||||
| 32nd(1851–1853) | ||||
| 33rd(1853–1855) | ||||
| 34th(1855–1857) | James Harlan (R) | |||
| 35th(1857–1859) | ||||
| James W. Grimes (R) | 36th(1859–1861) | |||
| 37th(1861–1863) | ||||
| 38th(1863–1865) | ||||
| 39th(1865–1867) | ||||
| Samuel J. Kirkwood (R) | ||||
| 40th(1867–1869) | James Harlan (R) | |||
| 41st(1869–1871) | ||||
| James B. Howell (R) | ||||
| George G. Wright (R) | 42nd(1871–1873) | |||
| 43rd(1873–1875) | William B. Allison (R) | |||
| 44th(1875–1877) | ||||
| Samuel J. Kirkwood (R) | 45th(1877–1879) | |||
| 46th(1879–1881) | ||||
| 47th(1881–1883) | ||||
| James W. McDill (R) | ||||
| James F. Wilson (R) | 48th(1883–1885) | |||
| 49th(1885–1887) | ||||
| 50th(1887–1889) | ||||
| 51st(1889–1891) | ||||
| 52nd(1891–1893) | ||||
| 53rd(1893–1895) | ||||
| John H. Gear (R) | 54th(1895–1897) | |||
| 55th(1897–1899) | ||||
| 56th(1899–1901) | ||||
| Jonathan P. Dolliver (R) | ||||
| 57th(1901–1903) | ||||
| 58th(1903–1905) | ||||
| 59th(1905–1907) | ||||
| 60th(1907–1909) | ||||
| Albert B. Cummins (R) | ||||
| 61st(1909–1911) | ||||
| Lafayette Young (R) | ||||
| 62nd(1911–1913) | ||||
| William S. Kenyon (R) | ||||
| 63rd(1913–1915) | ||||
| 64th(1915–1917) | ||||
| 65th(1917–1919) | ||||
| 66th(1919–1921) | ||||
| 67th(1921–1923) | ||||
| Charles A. Rawson (R) | ||||
| Smith W. Brookhart (R) | ||||
| 68th(1923–1925) | ||||
| 69th(1925–1927) | ||||
| Daniel F. Steck (D) | David W. Stewart (R) | |||
| 70th(1927–1929) | Smith W. Brookhart (R) | |||
| 71st(1929–1931) | ||||
| L. J. Dickinson (R) | 72nd(1931–1933) | |||
| 73rd(1933–1935) | Louis Murphy (D) | |||
| 74th(1935–1937) | ||||
| Guy Gillette (D) | ||||
| Clyde L. Herring (D) | 75th(1937–1939) | |||
| 76th(1939–1941) | ||||
| 77th(1941–1943) | ||||
| George A. Wilson (R) | 78th(1943–1945) | |||
| 79th(1945–1947) | Bourke B. Hickenlooper (R) | |||
| 80th(1947–1949) | ||||
| Guy Gillette (D) | 81st(1949–1951) | |||
| 82nd(1951–1953) | ||||
| 83rd(1953–1955) | ||||
| Thomas E. Martin (R) | 84th(1955–1957) | |||
| 85th(1957–1959) | ||||
| 86th(1959–1961) | ||||
| Jack Miller (R) | 87th(1961–1963) | |||
| 88th(1963–1965) | ||||
| 89th(1965–1967) | ||||
| 90th(1967–1969) | ||||
| 91st(1969–1971) | Harold Hughes (D) | |||
| 92nd(1971–1973) | ||||
| Dick Clark (D) | 93rd(1973–1975) | |||
| 94th(1975–1977) | John Culver (D) | |||
| 95th(1977–1979) | ||||
| Roger Jepsen (R) | 96th(1979–1981) | |||
| 97th(1981–1983) | Chuck Grassley (R) | |||
| 98th(1983–1985) | ||||
| Tom Harkin (D) | 99th(1985–1987) | |||
| 100th(1987–1989) | ||||
| 101st(1989–1991) | ||||
| 102nd(1991–1993) | ||||
| 103rd(1993–1995) | ||||
| 104th(1995–1997) | ||||
| 105th(1997–1999) | ||||
| 106th(1999–2001) | ||||
| 107th(2001–2003) | ||||
| 108th(2003–2005) | ||||
| 109th(2005–2007) | ||||
| 110th(2007–2009) | ||||
| 111th(2009–2011) | ||||
| 112th(2011–2013) | ||||
| 113th(2013–2015) | ||||
| Joni Ernst (R) | 114th(2015–2017) | |||
| 115th(2017–2019) | ||||
| 116th(2019–2021) | ||||
| 117th(2021–2023) | ||||
| 118th(2023–2025) | ||||
| 119th(2025–2027) | ||||
On July 4, 1838, theIowa Territory was organized. Most of the area comprising the territory was originally part of theLouisiana Purchase and was a part of theMissouri Territory. WhenMissouri became a state in 1821, this area (along withthe Dakotas) effectively becameunorganized territory. The area was closed to white settlers until the 1830s, after theBlack Hawk War ended. It was attached to theMichigan Territory on June 28, 1834, and was split off with theWisconsin Territory in 1836 whenMichigan became a state. The Iowa Territory was the "Iowa District" of westernWisconsin Territory – the region west of theMississippi River. The original boundaries of the territory, as established in 1838, included part ofMinnesota and parts ofthe Dakotas, covering about 194,000 square miles (500,000 km2) of land.
Starting on September 10, 1838,Iowa Territory sent a non-voting delegate to the House.
| Years | Delegate from Territory's at-large district |
|---|---|
| September 10, 1838 – October 27, 1840 | William W. Chapman(D) |
| October 28, 1840 – December 28, 1846 | Augustus C. Dodge(D) |
Following statehood on December 28, 1846, Iowa had two seats in the House. It elected both seats statewide at-large on a general ticket, until 1847, when it redistricted into two districts.
| Congress | Elected on ageneral ticket | |
|---|---|---|
| 1st seat | 2nd seat | |
| 29th(1845–1847) | Serranus C. Hastings(D) | Shepherd Leffler(D) |
| Congress | 1st district | 2nd district |
| 30th(1847–1849) | William Thompson(D) | Shepherd Leffler(D) |
| 31st(1849–1851) | ||
| Daniel F. Miller(W) | ||
| 32nd(1851–1853) | Bernhart Henn(D) | Lincoln Clark(D) |
| 33rd(1853–1855) | John Parsons Cook(W) | |
| 34th(1855–1857) | Augustus Hall(D) | James Thorington(W) |
| 35th(1857–1859) | Samuel Ryan Curtis(R) | Timothy Davis(R) |
| 36th(1859–1861) | William Vandever(R) | |
| 37th(1861–1863) | ||
| James F. Wilson(R) | ||
Following the1860 census, Iowa was apportioned 6 seats.
| Congress | 1st district | 2nd district | 3rd district | 4th district | 5th district | 6th district |
|---|---|---|---|---|---|---|
| 38th(1863–1865) | James F. Wilson(R) | Hiram Price(R) | William B. Allison(R) | Josiah B. Grinnell(R) | John A. Kasson(R) | Asahel W. Hubbard(R) |
| 39th(1865–1867) | ||||||
| 40th(1867–1869) | William Loughridge(R) | Grenville M. Dodge(R) | ||||
| 41st(1869–1871) | George W. McCrary(R) | William Smyth(R) | Francis W. Palmer(R) | Charles Pomeroy(R) | ||
| William P. Wolf(R) | ||||||
| 42nd(1871–1873) | Aylett R. Cotton(R) | William G. Donnan(R) | Madison M. Walden(R) | Jackson Orr(R) |
Following the1870 census, Iowa was apportioned 9 seats.
| Congress | 1st district | 2nd district | 3rd district | 4th district | 5th district | 6th district | 7th district | 8th district | 9th district |
|---|---|---|---|---|---|---|---|---|---|
| 43rd(1873–1875) | George W. McCrary(R) | Aylett R. Cotton(R) | William G. Donnan(R) | Henry Otis Pratt(R) | James Wilson(R) | William Loughridge(R) | John A. Kasson(R) | James W. McDill(R) | Jackson Orr(R) |
| 44th(1875–1877) | John Q. Tufts(R) | L. L. Ainsworth(D) | Ezekiel S. Sampson(R) | S. Addison Oliver(R) | |||||
| 45th(1877–1879) | Joseph Champlin Stone(R) | Hiram Price(R) | Theodore Weld Burdick(R) | Nathaniel Cobb Deering(R) | Rush Clark(R) | Henry J. B. Cummings(R) | William Fletcher Sapp(R) | ||
| 46th(1879–1881) | Moses A. McCoid(R) | Thomas Updegraff(R) | James B. Weaver(GB) | Edward H. Gillette(GB) | Cyrus C. Carpenter(R) | ||||
| William George Thompson(R) | |||||||||
| 47th(1881–1883) | Sewall S. Farwell(R) | Marsena E. Cutts(R) | John A. Kasson(R) | William P. Hepburn(R) | |||||
| John C. Cook(D) |
Following the1880 census, Iowa was apportioned 11 seats.
Following the1930 census, Iowa was apportioned 9 seats.
| Congress | District | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | |
| 73rd(1933–1935) | Edward C. Eicher(D) | Bernhard M. Jacobsen(D) | Albert Willford(D) | Fred Biermann(D) | Lloyd Thurston(R) | Cassius C. Dowell(R) | Otha Wearin(D) | Fred C. Gilchrist(R) | Guy Gillette(D) |
| 74th(1935–1937) | John W. Gwynne(R) | Hubert Utterback(D) | |||||||
| 75th(1937–1939) | William S. Jacobsen(D) | Cassius C. Dowell(R) | Vincent F. Harrington(D) | ||||||
| 76th(1939–1941) | Thomas E. Martin(R) | Henry O. Talle(R) | Karl M. LeCompte(R) | Ben F. Jensen(R) | |||||
| 77th(1941–1943) | Paul Cunningham(R) | ||||||||
| Harry Narey(R) | |||||||||
Following the1940 census, Iowa was apportioned 8 seats.
| Congress | District | |||||||
|---|---|---|---|---|---|---|---|---|
| 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | |
| 78th(1943–1945) | Thomas E. Martin(R) | Henry O. Talle(R) | John W. Gwynne(R) | Karl M. LeCompte(R) | Paul Cunningham (R) | Fred C. Gilchrist(R) | Ben F. Jensen(R) | Charles B. Hoeven(R) |
| 79th(1945–1947) | James I. Dolliver(R) | |||||||
| 80th(1947–1949) | ||||||||
| 81st(1949–1951) | H. R. Gross(R) | |||||||
| 82nd(1951–1953) | ||||||||
| 83rd(1953–1955) | ||||||||
| 84th(1955–1957) | Fred Schwengel(R) | |||||||
| 85th(1957–1959) | Merwin Coad(D) | |||||||
| 86th(1959–1961) | Leonard G. Wolf(D) | Steven V. Carter(D) | Neal Smith(D) | |||||
| 87th(1961–1963) | James E. Bromwell(R) | John Henry Kyl(R) | ||||||
Following the1960 census, Iowa was apportioned 7 seats.
| Congress | District | ||||||
|---|---|---|---|---|---|---|---|
| 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | |
| 88th(1963–1965) | Fred Schwengel(R) | James E. Bromwell(R) | H. R. Gross(R) | John Henry Kyl(R) | Neal Smith(D) | Charles B. Hoeven(R) | Ben F. Jensen(R) |
| 89th(1965–1967) | John R. Schmidhauser(D) | John Culver(D) | Bert Bandstra(D) | Stanley L. Greigg(D) | John R. Hansen(D) | ||
| 90th(1967–1969) | Fred Schwengel(R) | John Henry Kyl(R) | Wiley Mayne(R) | William J. Scherle(R) | |||
| 91st(1969–1971) | |||||||
| 92nd(1971–1973) | |||||||
Following the1970 census, Iowa was apportioned 6 seats.
| Congress | 1st district | 2nd district | 3rd district | 4th district | 5th district | 6th district |
|---|---|---|---|---|---|---|
| 93rd(1973–1975) | Edward Mezvinsky(D) | John Culver(D) | H. R. Gross(R) | Neal Smith(D) | William Scherle(R) | Wiley Mayne(R) |
| 94th(1975–1977) | Mike Blouin(D) | Chuck Grassley(R) | Tom Harkin(D) | Berkley Bedell(D) | ||
| 95th(1977–1979) | Jim Leach(R) | |||||
| 96th(1979–1981) | Tom Tauke(R) | |||||
| 97th(1981–1983) | T. Cooper Evans(R) | |||||
| 98th(1983–1985) | ||||||
| 99th(1985–1987) | Jim Ross Lightfoot(R) | |||||
| 100th(1987–1989) | Dave Nagle(D) | Fred Grandy(R) | ||||
| 101st(1989–1991) | ||||||
| 102nd(1991–1993) | Jim Nussle(R) |
Following the1990 census, Iowa was apportioned 5 seats.
| Congress | 1st district | 2nd district | 3rd district | 4th district | 5th district |
|---|---|---|---|---|---|
| 103rd(1993–1995) | Jim Leach(R) | Jim Nussle(R) | Jim Ross Lightfoot(R) | Neal Smith(D) | Fred Grandy(R) |
| 104th(1995–1997) | Greg Ganske(R) | Tom Latham(R) | |||
| 105th(1997–1999) | Leonard Boswell(D) | ||||
| 106th(1999–2001) | |||||
| 107th(2001–2003) | |||||
| 108th(2003–2005) | Jim Nussle(R) | Jim Leach(R) | Tom Latham(R) | Steve King(R) | |
| 109th(2005–2007) | |||||
| 110th(2007–2009) | Bruce Braley(D) | Dave Loebsack(D) | |||
| 111th(2009–2011) | |||||
| 112th(2011–2013) |
Following the2010 census, Iowa was apportioned 4 seats.
| Congress | 1st district | 2nd district | 3rd district | 4th district |
|---|---|---|---|---|
| 113th(2013–2015) | Bruce Braley(D) | Dave Loebsack(D) | Tom Latham(R) | Steve King(R) |
| 114th(2015–2017) | Rod Blum(R) | David Young(R) | ||
| 115th(2017–2019) | ||||
| 116th(2019–2021) | Abby Finkenauer(D) | Cindy Axne(D) | ||
| 117th(2021–2023) | Ashley Hinson(R) | Mariannette Miller-Meeks(R) | Randy Feenstra(R) | |
| 118th(2023–2025) | Mariannette Miller-Meeks(R) | Ashley Hinson(R) | Zach Nunn(R) | |
| 119th (2025–2027) |
| Democratic (D) |
| Greenback (GB) |
| Republican (R) |
| Whig (W) |
