Wisconsin's 1st congressional district
Interactive map of district boundaries since January 3, 2023
Representative	Bryan Steil R–Janesville
Area	1,679.95 sq mi (4,351.1 km2)
Distribution	84.13% urban 15.87% rural
Population (2024)	739,693[1]
Median household income	$79,452[2]
Ethnicity	74.2%White[3] 12.7%Hispanic 6.5%Black 4.0%Two or more races 2.0%Asian 0.6% other
Cook PVI	R+2[4]

Wisconsin's 1st congressional district is acongressional district of theUnited States House of Representatives in southeasternWisconsin, coveringKenosha County,Racine County, and most ofWalworth County, as well as portions ofRock County andMilwaukee County. The district's current Representative isRepublicanBryan Steil.

Among the district's previous representatives areU.S. Secretary of DefenseLes Aspin andSpeaker of the House and 2012Vice Presidential-nomineePaul Ryan.

A slightlyRepublican-leaning district, it was carried byGeorge W. Bush in2004 with 53%; the district voted forBarack Obama overJohn McCain in2008, 51.40–47.45% and the district voted forMitt Romney over Barack Obama in2012, 52.12%–47.88%.^[5] It stayed Republican in 2016, with a plurality of voters polling for Donald Trump.^[6]

For the118th and successive Congresses (based on redistricting following the2020 census), the district contains all or portions of the following counties, towns, and municipalities:^[7]

Kenosha County (13)

All 13 towns and municipalities

Milwaukee County (7)

Cudahy,Franklin,Greendale,Hales Corners,Oak Creek,South Milwaukee,St. Francis

Racine County (17)

All 17 towns and municipalities

Rock County (15)

Beloit (city) (part; also2nd),Beloit (town) (part; also2nd)Bradford,Clinton (town),Clinton (village),Janesville (city) (part; also2nd),Janesville (town) (part; also2nd),Johnstown,La Prairie (part; also2nd),Lima,Milton (city),Milton (town),Rock (part; also2nd),Turtle (part; also2nd)

Walworth County (26)

Bloomfield,Darien (town),Darien (village),Delavan (city),Delavan (town),East Troy (part; also5th),Elkhorn,Geneva,Genoa City (shared with Kenosha County),Fontana-on-Geneva Lake,Lafayette,Lake Geneva,La Grange,Linn,Lyons,Richmond,Sharon (town),Sharon (village),Spring Prairie,Sugar Creek,Troy,Walworth (town),Walworth (village),Whitewater (city) (part; also5th; shared withJefferson County),Whitewater (town),Williams Bay

Currently, it is a swing district that leans Republican, although it was redrawn to be more Democratic-leaning in 2022.

Member	Party	Years	Cong ress	Electoral history	District
District established June 5, 1848
William Pitt Lynde (Milwaukee)	Democratic	June 5, 1848 – March 3, 1849	30th	Elected to the short term in 1848. Lost re-election.	Green, Jefferson, Milwaukee, Racine, Rock, Walworth, & Waukesha counties
Charles Durkee (Kenosha)	Free Soil	March 4, 1849 – March 3, 1853	31st 32nd	Elected to the regular term in 1848. Re-elected in 1850. Retired.	Milwaukee, Racine, Walworth, & Waukesha counties (& Kenosha—created in 1850 from Racine)
Daniel Wells Jr. (Milwaukee)	Democratic	March 4, 1853 – March 3, 1857	33rd 34th	Elected in 1852. Re-elected in 1854. Retired.
John F. Potter (East Troy)	Republican	March 4, 1857 – March 3, 1863	35th 36th 37th	Elected in 1856. Re-elected in 1858. Re-elected in 1860. Lost re-election.
James S. Brown (Milwaukee)	Democratic	March 4, 1863 – March 3, 1865	38th	Elected in 1862. Withdrew from re-election.	Kenosha, Milwaukee, Racine, Walworth, & Waukesha counties
Halbert E. Paine (Milwaukee)	Republican	March 4, 1865 – March 3, 1871	39th 40th 41st	Elected in 1864. Re-elected in 1866. Re-elected in 1868. Retired.
Alexander Mitchell (Milwaukee)	Democratic	March 4, 1871 – March 3, 1873	42nd	Elected in 1870. Redistricted to the4th district.
Charles G. Williams (Janesville)	Republican	March 4, 1873 – March 3, 1883	43rd 44th 45th 46th 47th	Elected in 1872. Re-elected in 1874. Re-elected in 1876. Re-elected in 1878. Re-elected in 1880. Lost re-election.	Kenosha, Racine, Rock, Walworth, & Waukesha counties
John Winans (Janesville)	Democratic	March 4, 1883 – March 3, 1885	48th	Elected in 1882. Retired to run for mayor ofJanesville.	Jefferson, Kenosha, Racine, Rock, & Walworth counties
Lucien B. Caswell (Fort Atkinson)	Republican	March 4, 1885 – March 3, 1891	49th 50th 51st	Elected in 1884. Re-elected in 1886. Re-elected in 1888. Lost renomination.
Clinton Babbitt (Beloit)	Democratic	March 4, 1891 – March 3, 1893	52nd	Elected in 1890. Lost re-election.
Henry Allen Cooper (Racine)	Republican	March 4, 1893 – March 3, 1919	53rd 54th 55th 56th 57th 58th 59th 60th 61st 62nd 63rd 64th 65th	Elected in 1892. Re-elected in 1894. Re-elected in 1896. Re-elected in 1898. Re-elected in 1900. Re-elected in 1902. Re-elected in 1904. Re-elected in 1906. Re-elected in 1908. Re-elected in 1910. Re-elected in 1912. Re-elected in 1914. Re-elected in 1916. Lost renomination and lost re-election as anindependent.	Green, Kenosha, Lafayette, Racine, Rock, & Walworth counties
					Green, Kenosha, Lafayette, Racine, Rock, & Walworth counties
					Kenosha, Racine, Rock, Walworth, & Waukesha counties
Clifford E. Randall (Kenosha)	Republican	March 4, 1919 – March 3, 1921	66th	Elected in 1918. Lost renomination.
Henry Allen Cooper (Racine)	Republican	March 4, 1921 – March 1, 1931	67th 68th 69th 70th 71st	Elected in 1920. Re-elected in 1922. Re-elected in 1924. Re-elected in 1926. Re-elected in 1928. Re-elected in 1930 but died before next term began.
Vacant		March 1, 1931 – October 13, 1931	71st 72nd
Thomas Ryum Amlie (Elkhorn)	Republican	October 13, 1931 – March 3, 1933	72nd	Elected to finish Cooper's term. Lost renomination.
George Washington Blanchard (Edgerton)	Republican	March 4, 1933 – January 3, 1935	73rd	Elected in 1932. Renominated but withdrew prior to election.	Green, Kenosha, Racine, Rock, & Walworth counties
Thomas Ryum Amlie (Elkhorn)	Progressive	January 3, 1935 – January 3, 1939	74th 75th	Elected in 1934. Re-elected in 1936. Retired torun for U.S. senator.
Stephen Bolles (Janesville)	Republican	January 3, 1939 – July 8, 1941	76th 77th	Elected in 1938. Re-elected in 1940. Died.
Vacant		July 8, 1941 – August 29, 1941	77th
Lawrence H. Smith (Racine)	Republican	August 29, 1941 – January 22, 1958	77th 78th 79th 80th 81st 82nd 83rd 84th 85th	Elected to finish Bolles's term. Re-elected in 1942. Re-elected in 1944. Re-elected in 1946. Re-elected in 1948. Re-elected in 1950. Re-elected in 1952. Re-elected in 1954. Re-elected in 1956. Died.
Vacant		January 22, 1958 – January 3, 1959	85th
Gerald T. Flynn (Racine)	Democratic	January 3, 1959 – January 3, 1961	86th	Elected in 1958. Lost re-election.
Henry C. Schadeberg (Burlington)	Republican	January 3, 1961 – January 3, 1965	87th 88th	Elected in 1960. Re-elected in 1962. Lost re-election.
Lynn E. Stalbaum (Racine)	Democratic	January 3, 1965 – January 3, 1967	89th	Elected in 1964. Lost re-election.	Kenosha, Racine, Rock, & Walworth counties
Henry C. Schadeberg (Burlington)	Republican	January 3, 1967 – January 3, 1971	90th 91st	Elected in 1966. Re-elected in 1968. Lost re-election.
Les Aspin (East Troy)	Democratic	January 3, 1971 – January 20, 1993	92nd 93rd 94th 95th 96th 97th 98th 99th 100th 101st 102nd 103rd	Elected in 1970. Re-elected in 1972. Re-elected in 1974. Re-elected in 1976. Re-elected in 1978. Re-elected in 1980. Re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Re-elected in 1990. Re-elected in 1992. Resigned to becomeU.S. Secretary of Defense.
					Kenosha, Racine, Rock, & Walworth counties & easternGreen County& part ofJefferson County Green County Town of Albany Town of Spring Grove Village of Albany City of Brodhead Jefferson County City of Whitewater
					Kenosha, Racine, Rock, & Walworth counties & easternGreen County& part ofJefferson County Green County Town of Albany Town of Brooklyn Town of Cadiz Town of Clarno Town of Decatur Town of Exeter Town of Jefferson Town of Mt. Pleasant Town of Spring Grove Village of Albany Village of Browntown Village of Monticello City of Brodhead Jefferson County City of Whitewater
Vacant		January 20, 1993 – May 4, 1993	103rd		1993–2003
Peter W. Barca (Kenosha)	Democratic	May 4, 1993 – January 3, 1995		Elected to finish Aspin's term. Lost re-election.
Mark Neumann (Janesville)	Republican	January 3, 1995 – January 3, 1999	104th 105th	Elected in 1994. Re-elected in 1996. Retired torun for U.S. senator.
Paul Ryan (Janesville)	Republican	January 3, 1999 – January 3, 2019	106th 107th 108th 109th 110th 111th 112th 113th 114th 115th	Elected in 1998. Re-elected in 2000. Re-elected in 2002. Re-elected in 2004. Re-elected in 2006. Re-elected in 2008. Re-elected in 2010. Re-elected in 2012. Re-elected in 2014. Re-elected in 2016. Retired.
					2003–2013
					2013–2023
Bryan Steil (Janesville)	Republican	January 3, 2019 – present	116th 117th 118th 119th	Elected in 2018. Re-elected in 2020. Re-elected in 2022. Re-elected in 2024.
					2023–present

• Martis, Kenneth C. (1989).The Historical Atlas of Political Parties in the United States Congress. New York: Macmillan Publishing Company.
• Martis, Kenneth C. (1982).The Historical Atlas of United States Congressional Districts. New York: Macmillan Publishing Company.
• Congressional Biographical Directory of the United States 1774–present

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