The18th congressional district of Illinois covered central and westernIllinois, including all ofJacksonville andQuincy and parts ofBloomington,Peoria, andSpringfield. It covered much of the territory represented byAbraham Lincoln during his single term in the House.

It was last represented byRepublicanDarin LaHood, who took office in September 2015 following a special election.^[1]

RepublicanAaron Schock previously represented the district from January 2009 until his resignation in March 2015.^[2] Darin LaHood is the son of Schock's predecessor,Ray LaHood, and was reelected in 2016, 2018, and 2020.

From 1949 to 2015, the district was always represented by an attendee or graduate ofBradley University. Due to reapportionment after the2020 U.S. census, the 18th district was eliminated ahead of the2022 elections.

The district covered parts ofMcLean,Peoria,Sangamon,Stark andTazewell counties, and all ofAdams,Brown,Cass,Hancock,Logan,Marshall,Mason,McDonough,Menard,Morgan,Pike,Schuyler,Scott andWoodford counties, as of the 2011 redistricting which followed the2010 census. All or parts ofBloomington,Chatham,Jacksonville,Lincoln,Macomb,Morton,Normal,Peoria,Quincy andSpringfield were included.^[3] The representatives for these districts were elected in the 2012 primary and general elections, and the boundaries became effective on January 5, 2013.

Due to Illinois losing population in the2020 United States census, the district was eliminated in January 2023.^[4]

Member	Party	Years	Cong ress	Electoral history
District created March 4, 1873
Isaac Clements (Carbondale)	Republican	March 4, 1873 – March 3, 1875	43rd	Elected in 1872. Lost re-election.
William Hartzell (Chester)	Democratic	March 4, 1875 – March 3, 1879	44th 45th	Elected in 1874. Re-elected in 1876. Retired.
John R. Thomas (Metropolis)	Republican	March 4, 1879 – March 3, 1883	46th 47th	Elected in 1878. Re-elected in 1880. Redistricted to the20th district.
William R. Morrison (Waterloo)	Democratic	March 4, 1883 – March 3, 1887	48th 49th	Redistricted from the17th district andre-elected in 1882. Re-elected in 1884. Lost re-election.
Jehu Baker (Belleville)	Republican	March 4, 1887 – March 3, 1889	50th	Elected in 1886. Lost re-election.
William S. Forman (Nashville)	Democratic	March 4, 1889 – March 3, 1895	51st 52nd 53rd	Elected in 1888. Re-elected in 1890. Re-elected in 1892. Retired.
Frederick Remann (Vandalia)	Republican	March 4, 1895 – July 14, 1895	54th	Elected in 1894. Died.
Vacant		July 14, 1895 – December 2, 1895
William F. L. Hadley (Edwardsville)	Republican	December 2, 1895 – March 3, 1897		Elected to finish Remann's term. Lost re-election.
Thomas M. Jett (Hillsboro)	Democratic	March 4, 1897 – March 3, 1903	55th 56th 57th	Elected in 1896. Re-elected in 1898. Re-elected in 1900. Retired.
Joseph G. Cannon (Danville)	Republican	March 4, 1903 – March 3, 1913	58th 59th 60th 61st 62nd	Redistricted from the12th district andre-elected in 1902. Re-elected in 1904. Re-elected in 1906. Re-elected in 1908. Re-elected in 1910. Lost re-election.
Frank T. O'Hair (Paris)	Democratic	March 4, 1913 – March 3, 1915	63rd	Elected in 1912. Lost re-election.
Joseph G. Cannon (Danville)	Republican	March 4, 1915 – March 3, 1923	64th 65th 66th 67th	Elected in 1914. Re-elected in 1916. Re-elected in 1918. Re-elected in 1920. Retired.
William P. Holaday (Georgetown)	Republican	March 4, 1923 – March 3, 1933	68th 69th 70th 71st 72nd	Elected in 1922. Re-elected in 1924. Re-elected in 1926. Re-elected in 1928. Re-elected in 1930. Lost re-election.
James A. Meeks (Danville)	Democratic	March 4, 1933 – January 3, 1939	73rd 74th 75th	Elected in 1932. Re-elected in 1934. Re-elected in 1936. Lost re-election.
Jessie Sumner (Milford)	Republican	January 3, 1939 – January 3, 1947	76th 77th 78th 79th	Elected in 1938. Re-elected in 1940. Re-elected in 1942. Re-elected in 1944. Retired.
Edward H. Jenison (Paris)	Republican	January 3, 1947 – January 3, 1949	80th	Elected in 1946. Redistricted to the23rd district.
Harold H. Velde (Pekin)	Republican	January 3, 1949 – January 3, 1957	81st 82nd 83rd 84th	Elected in 1948. Re-elected in 1950. Re-elected in 1952. Re-elected in 1954. Retired.
Robert H. Michel (Peoria)	Republican	January 3, 1957 – January 3, 1995	85th 86th 87th 88th 89th 90th 91st 92nd 93rd 94th 95th 96th 97th 98th 99th 100th 101st 102nd 103rd	Elected in 1956. Re-elected in 1958. Re-elected in 1960. Re-elected in 1962. Re-elected in 1964. Re-elected in 1966. Re-elected in 1968. Re-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. Retired.
Ray LaHood (Peoria)	Republican	January 3, 1995 – January 3, 2009	104th 105th 106th 107th 108th 109th 110th	Elected in 1994. Re-elected in 1996. Re-elected in 1998. Re-elected in 2000. Re-elected in 2002. Re-elected in 2004. Re-elected in 2006. Retired.[7]
Aaron Schock (Peoria)	Republican	January 3, 2009 – March 31, 2015	111th 112th 113th 114th	Elected in 2008. Re-elected in 2010. Re-elected in 2012. Re-elected in 2014. Resigned.[8]
Vacant		March 31, 2015 – September 10, 2015	114th
Darin LaHood (Peoria)	Republican	September 10, 2015 – January 3, 2023	114th 115th 116th 117th	Elected to finish Schock's term. Re-elected in 2016. Re-elected in 2018. Re-elected in 2020. Redistricted to the16th district.
District eliminated January 3, 2023

Ray LaHood decided not to seek re-election in 2008 and was chosen byBarack Obama to serve asU.S. Secretary of Transportation. Illinois State RepresentativeAaron Schock of Peoria won the seat for the Republicans in the November 4, 2008 election. His main opponent was DemocratColleen Callahan, of Kickapoo, a radio and television broadcaster. Green Party candidate and educatorSheldon Schafer, of Peoria, was in a distant third place on the ballot.^[9]

• Illinois's congressional districts
• List of United States congressional districts

Specific

General

• 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

• 2006 election fromThe Washington Post
  • 18th District census profile, 2006
• 18th District Fact SheetArchived September 28, 2011, at theWayback Machine from theUnited States Census Bureau
• "U.S. Census Bureau - 18th District map"(PDF). (6.29 MiB)
• Campaign contributions fromOpenSecrets.org

40°13′38″N90°04′09″W / 40.22722°N 90.06917°W /40.22722; -90.06917

• Congressional districts of Illinois
• Jacksonville, Illinois micropolitan area
• Peoria metropolitan area, Illinois
• Springfield metropolitan area, Illinois
• Constituencies established in 1873
• 1873 establishments in Illinois
• Constituencies disestablished in 2023
• 2023 disestablishments in Illinois
• Joseph Gurney Cannon

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