The 12th congressional district of Illinois is a congressional district in the southern part of U.S. state of Illinois. It has been represented by Republican Mike Bost since 2015. With a Cook Partisan Voting Index of R+22, it is the most Republican district in Illinois.
History 2011 redistricting The district covers parts of Madison and St. Clair counties, and all of Alexander, Franklin, Hamilton, Jackson, Jefferson, Monroe, Perry, Pulaski, Randolph, Union and Williamson counties, as of the 2011 redistricting which followed the 2010 census. All or parts of Belleville, Cahokia, Carbondale, Collinsville, East St. Louis, Granite City, Herrin, Marion, Mt. Vernon, O'Fallon, Shiloh and Swansea are included.Illinois Congressional District 12 , Illinois Board of Elections The representatives for these districts were elected in the 2012 primary and general elections, and the boundaries became effective on January 5, 2013.
Composition For the 118th and successive Congresses (based on redistricting following the 2020 census), the district contains all or portions of the following counties, townships, and municipalities:https://www2.census.gov/geo/maps/cong_dist/cd119/cd_based/ST17/CD119_IL12.pdf
Alexander County (5)
All five municipalities Clark County (19) All 19 townships and municipalities
Clay County (18)
All 18 townships and municipalities Clinton County (32) All 32 townships and municipalities Coles County (13) Ashmore, Ashmore Township, Charleston (part, also 15th), Charleston Township (part, also 15th), East Oakland Township, Hutton Township, Lafayette Township (part, also 15th), Lerna, Mattoon (part, also 15th), Morgan Township, Oakland, Paradise Township, Pleasant Grove Township
Crawford County (16)
All 16 townships and municipalities
Cumberland County (14)
All 14 townships and municipalities
Edwards County (5)
All five municipalities Effingham County (25) All 25 townships and municipalities Gallatin County (17) All 17 townships and municipalities
Hamilton County (17)
All 17 townships and municipalities
Hardin County (3)
All three townships and municipalities Jackson County (27) All 27 townships and municipalities
Jasper County (18)
All 18 townships and municipalities Jefferson County (25) All 25 townships and municipalities Johnson County (8) All eight townships and municipalities Lawrence County (14) All 14 townships and municipalities
Marion County (31)
All 31 townships and municipalities
Massac County (3)
All three townships and municipalities Monroe County (6) All six townships and municipalities Perry County (6) All six townships and municipalities Pope County (2) All two townships and municipalities Pulaski County (7) All seven townships and municipalities Randolph County (14) All 14 townships and municipalities Saline County (20) All 20 townships and municipalities St. Clair County (33) Belleville (part, also 13th), Caseyville (part, also 13th), Engelmann Township, Dupo (part, also 13th; shared with Monroe County), Fairview Heights (part, also 13th), Fayetteville, Fayetteville Township, Freeburg, Freeburg Township, Lebanon, Lebanon Township, Lenzburg, Lenzburg Township, Marissa, Marissa Township, Mascoutah, Mascoutah Township, Millstadt, Millstadt Township, New Athens, New Athens Township, New Baden (part, shared with Clinton County), O'Fallon (part, also 13th), O'Fallon Township (part, also 13th), Prairie du Long Township, Shiloh (part, also 13th), Shiloh Valley Township, Smithton, Smithton Township, St. Libory, Stookey Township, Sugar Loaf Township (part, also 13th), Summerfield
Union County (4)
All four townships and municipalities
Wabash County (4)
All four townships and municipalities
Wayne County (29)
All 29 townships and municipalities
White County (20)
All 20 townships and municipalities
Williamson County (16)
All 16 townships and municipalities
Recent election results from statewide races Year Office Results2008 PresidentMcCain 54–44%2012 PresidentRomney 63–37%2016 PresidentTrump 69–26% SenateKirk 56–39% Comptroller (Spec.)Munger 63–32%2018 GovernorRauner 57–33% Attorney GeneralHarold 67–30% Secretary of StateHelland 51–47% ComptrollerSenger 61–36% TreasurerDodge 63–34%2020 PresidentTrump 70–28% SenateCurran 66–31%2022 SenateSalvi 68–30% GovernorBailey 73–25% Attorney GeneralDeVore 72–25% Secretary of StateBrady 72–25% ComptrollerTeresi 68–30% TreasurerDemmer 72–26%2024 PresidentTrump 71–27%
List of members representing the district Name Party Years Cong–ress Electoral history Counties District created March 4, 1863 William Ralls Morrison Democratic March 4, 1863 –March 3, 1865 Elected in 1862.Lost re-election. 1863–1873Clinton, Madison, Monroe, Randolph, St. Clair, and Washington Jehu Baker Republican March 4, 1865 –March 3, 1869 Elected in 1864.Re-elected in 1866.Retired. John B. Hay Republican March 4, 1869 –March 3, 1873 Elected in 1868.Re-elected in 1870.Redistricted to the and lost re-election. James Carroll Robinson Democratic March 4, 1873 –March 3, 1875 Redistricted from the and re-elected in 1872.Retired. 1873–1883Cass, Christian, Menard, Morgan, Sangamon, and Scott William McKendree Springer Democratic March 4, 1875 –March 3, 1883 Elected in 1874.Re-elected in 1876.Re-elected in 1878.Re-elected in 1880.Redistricted to the . James M. Riggs Democratic March 4, 1883 –March 3, 1887 Elected in 1882.Re-elected in 1884.Retired. 1883–1895 George A. Anderson Democratic March 4, 1887 –March 3, 1889 Elected in 1886.Retired. Scott Wike Democratic March 4, 1889 –March 3, 1893 Elected in 1888.Re-elected in 1890.Lost renomination. John James McDannold Democratic March 4, 1893–March 3, 1895 Elected in 1892.Retired. Joseph Gurney Cannon Republican March 4, 1895–March 3, 1903 Redistricted from the and re-elected in 1894.Re-elected in 1896.Re-elected in 1898.Re-elected in 1900.Redistricted to the . 1895–1903Iroquois, Kankakee, Vermillion, and Will Charles Eugene Fuller Republican March 4, 1903–March 3, 1913 Elected in 1902.Re-elected in 1904.Re-elected in 1906.Re-elected in 1908.Re-elected in 1910.Lost re-election. 1903–1913Boone, DeKalb, Grundy, Kendall, LaSalle, and Winnebago William H. Hinebaugh Progressive March 4, 1913–March 3, 1915 Elected in 1912.Lost re-election. 1913–1949Boone, DeKalb, Grundy, Kendall, LaSalle, and Winnebago Charles Eugene Fuller Republican March 4, 1915–June 25, 1926 Elected again in 1914.Re-elected in 1916.Re-elected in 1918.Re-elected in 1920.Re-elected in 1922.Re-elected in 1924.Died. Vacant June 25, 1926–March 3, 1927 John T. Buckbee Republican March 4, 1927–April 23, 1936 Elected in 1926.Re-elected in 1928.Re-elected in 1930.Re-elected in 1932.Re-elected in 1934.Died. Vacant April 23, 1936–January 3, 1937 Noah M. Mason Republican January 3, 1937–January 3, 1949 Elected in 1936.Re-elected in 1938.Re-elected in 1940.Re-elected in 1942.Re-elected in 1944.Re-elected in 1946.Redistricted to the . Edgar A. Jonas Republican January 3, 1949–January 3, 1955 Elected in 1948.Re-elected in 1950.Re-elected in 1952.Lost re-election. 1949–1953Cook 1953–1963Cook Charles A. Boyle Democratic January 3, 1955–November 4, 1959 Elected in 1954.Re-elected in 1956.Re-elected in 1958.Died. Vacant November 4, 1959–January 3, 1961 Edward Rowan Finnegan Democratic January 3, 1961–January 3, 1963 Elected in 1960.Redistricted to the . Robert McClory Republican January 3, 1963–January 3, 1973 Elected in 1962.Re-elected in 1964.Re-elected in 1966.Re-elected in 1968.Re-elected in 1970.Redistricted to the . 1963–1967Boone, Lake, and McHenry 1967–1973Cook, Lake, and McHenry Phil Crane Republican January 3, 1973–January 3, 1993 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.Redistricted to the . 1973–1983Cook and Lake 1983–1993Cook, Lake, and McHenry Jerry Costello Democratic January 3, 1993–January 3, 2013 Redistricted from the and re-elected in 1992.Re-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.Re-elected in 2008.Re-elected in 2010.Retired. 1993–2003Alexander, Jackson, Madison, Monroe, Perry, Randolph, St. Clair, Union, and Williamson 2003–2013Alexander, Franklin, Jackson, Madison, Monroe, Perry, Pulaski, Randolph, St. Clair, Union, Williamson William Enyart Democratic January 3, 2013–January 3, 2015 Elected in 2012.Lost re-election. 2013–2023Alexander, Franklin, Jackson, Jefferson, Madison, Monroe, Perry, Pulaski, Randolph, St. Clair, Union, and Williamson Mike Bost Republican January 3, 2015–present Elected in 2014.Re-elected in 2016.Re-elected in 2018.Re-elected in 2020.Re-elected in 2022.Re-elected in 2024. 2023–presentAlexander, Clark, Clay, Clinton, Coles (part), Crawford, Cumberland, Edwards, Effingham, Franklin, Gallatin, Hamilton, Hardin, Jackson, Jasper, Jefferson, Johnson, Lawrence, Marion, Massac, Monroe, Perry, Pope, Pulaski, Randolph, Richland, Saline, St. Clair (part), Union, Wabash, Washington, Wayne, White, and Williamson
Elections
2012
2014
2016
2018
2020
2022
2024
See also Illinois's congressional districts List of United States congressional districts
References
Sources
Congressional Biographical Directory of the United States 1774–present, bioguide.congress.gov; accessed November 10, 2016.
External links Washington Post page on the 12th District of Illinois U.S. Census Bureau - 5th District Fact Sheet