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Illinois's 12th congressional district

U.S. House district for Illinois

U.S. House district for Illinois

FieldValue
stateIllinois
district number12
image name
image captionInteractive map of district boundaries since January 3, 2023
representativeMike Bost
partyRepublican
residenceMurphysboro
english area14296.2
percent urban75.4
percent rural24.6
population745,901
population year2024
median income$70,903
percent white86.9
percent hispanic2.8
percent black4.9
percent asian1.0
percent more than one race3.9
percent other race0.5
cpviR+22

| percent more than one race = 3.9

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. The representatives for these districts were elected in the 2012 primary and general elections, and the boundaries became effective on January 5, 2013.

Composition

#CountySeatPopulation
23ClarkMarshall15,088
25ClayLouisville12,999
27ClintonCarlyle36,785
29ColesCharleston46,060
33CrawfordRobinson18,300
35CumberlandToledo10,261
47EdwardsAlbion5,968
49EffinghamEffingham34,331
59GallatinShawneetown4,670
65HamiltonMcLeansboro7,911
69HardinElizabethtown3,569
77JacksonMurphysboro52,141
79JasperNewton9,144
81JeffersonMount Vernon36,320
87JohnsonVienna13,326
101LawrenceLawrenceville14,813
121MarionSalem36,673
125MassacMetropolis13,661
133MonroeWaterloo34,957
145PerryPinckneyville20,503
151PopeGolconda3,707
153PulaskiMound City4,911
157RandolphChester29,815
165SalineHarrisburg22,873
163St. ClairBelleville251,018
181UnionJonesboro16,667
185WabashMount Carmel10,942
191WayneFairfield15,761
193WhiteCarmi13,401
199WilliamsonMarion66,706

Cities and CDPs with 10,000 or more people

  • Belleville – 42,404
  • O'Fallon – 32,289
  • Carbondale – 25,083
  • Charleston – 17,286
  • Mattoon – 16,870
  • Marion – 16,855
  • Fairview Heights – 16,706
  • Mount Vernon – 14,600
  • Shiloh – 14,098
  • Herrin – 12,352
  • Effingham – 12,252
  • Centralia – 12,182
  • Waterloo – 11,013
  • Columbia – 10,999

2,500 to 10,000 people

  • Mascoutah – 8,754
  • Olney – 8,701
  • Harrisburg – 8,219
  • Chester – 7,640
  • Salem – 7,282
  • West Frankfort – 7,275
  • Robinson – 7,150
  • Murphysboro – 7,093
  • Mount Carmel – 7,015
  • Benton – 6,709
  • Metropolis – 5,969
  • Carterville – 5,848
  • Du Quoin – 5,827
  • Pinckneyville – 5,066
  • Fairfield – 4,883
  • Carmi – 4,865
  • Flora – 4,803
  • Lebanon – 4,691
  • Breese – 4,641
  • Freeburg – 4,582
  • Caseyville – 4,400
  • Anna – 4,303
  • Lawrenceville – 4,164
  • Sparta – 4,095
  • Millstadt – 4,071
  • Smithton – 4,006
  • Marshall – 3,947
  • Red Bud – 3,804
  • Eldorado – 3,743
  • Scott AFB – 3,612
  • New Baden – 3,428
  • Johnston City – 3,384
  • Carlyle – 3,253
  • Nashville – 3,105
  • Newton – 2,777
  • Christopher – 2,697
  • Trenton – 2,690
  • McLeansboro – 2,675
  • Sumner – 2,631

Following the 2020 redistricting, this district will go from covering southeastern Illinois to encompassing the entirety of Southern Illinois, spanning the Illinois-Missouri-Kentucky-Indiana border. It will take in Monroe, Randolph, Clinton, Perry, Jackson, Union, Alexander, Pulaski, Massac, Johnson, Williamson, Jefferson, Marion, Clay, Effingham, Wayne, Hamilton, Saline, Pope, Hardin, Gallatin, White, Edwards, Wabash, Richland, Lawrence, Jasper, Crawford, Cumberland, and Clark Counties, most of St. Clair County, and half of Coles County.

St. Clair County is split between this district and the 13th district. They are partitioned by a Conrail line, Tanglewood Parkway, Donner Ridge, Hollywood Heights Rd, Oliver St, CSX Transportation Line, S Oak St, W 5th St, S Lincoln Ave, E US Highway 50, County Rd 218, Old O'Fallon Rd, Frank Scott Parkway E, N Green Mount Rd, S Green Mount Rd, Park Rd, S 59th St, Old St. Louis Rd, Illinois Highway 15, Rolling Acres Ln, Excellence Dr, Powdermill Creek, Cemetery Rd, and Illinois Highway 50. The 12th district takes in the municipalities of Mascoutah, Lebanon, New Athens, Marissa, Millstadt, Smithton, Freeburg, Summerfield, Scott AFB, Rentchler, Floraville, Paderborn, Fayetteville, St. Libory, Darmstadt, and Lenzburg; most of Shiloh; half of O'Fallon; and part of Caseyville, Fairview Heights, and Belleville.

Coles County is split between this district and the 15th district. They are partitioned by West St, North County Rd 1800 East, Lincoln Prairie Grass Trail, 18th St, County Rd 1600 East, County Rd 400 North, County Rd 1240 East, Illinois Route 16, Dettro Dr, 700 North Rd, Old Fellow Rd, and the Kickapoo Creek. The 12th district takes in the communities of Ashmore, Oakland, Lerna, Janesville (shared with Cumberland County), and Trilla; part of southern Mattoon; and part of Charleston.

Recent election results from statewide races

YearOfficeResults
2008PresidentMcCain 54% - 44%
2012PresidentRomney 63% - 37%
2016PresidentTrump 69% - 26%
SenateKirk 56% - 39%
Comptroller (Spec.)Munger 63% - 32%
2018GovernorRauner 57% - 33%
Attorney GeneralHarold 67% - 30%
Secretary of StateHelland 51% - 47%
ComptrollerSenger 61% - 36%
TreasurerDodge 63% - 34%
2020PresidentTrump 70% - 28%
SenateCurran 66% - 31%
2022SenateSalvi 68% - 30%
GovernorBailey 73% - 25%
Attorney GeneralDeVore 72% - 25%
Secretary of StateBrady 72% - 25%
ComptrollerTeresi 68% - 30%
TreasurerDemmer 72% - 26%
2024PresidentTrump 71% - 27%

List of members representing the district

NamePartyYearsCong–
ressElectoral historyCounties
District created March 4, 1863
[[File:WilliamRallsMorrison.png100px]]
William Ralls Morrison
(Waterloo)DemocraticnowrapMarch 4, 1863 –
March 3, 1865Elected in 1862.
Lost re-election.1863–1873
Clinton, Madison, Monroe, Randolph, St. Clair, and Washington
[[File:JehuBaker.jpg100px]]
Jehu Baker
(Belleville)RepublicannowrapMarch 4, 1865 –
March 3, 1869Elected in 1864.
Re-elected in 1866.
Retired.
[[File:JohnBHay.jpg100px]]
John B. Hay
(Belleville)RepublicannowrapMarch 4, 1869 –
March 3, 1873Elected in 1868.
Re-elected in 1870.
Redistricted to the and lost re-election.
[[File:JamesCarrollRobinson.jpg100px]]
James Carroll Robinson
(Springfield)DemocraticnowrapMarch 4, 1873 –
March 3, 1875Redistricted from the and re-elected in 1872.
Retired.1873–1883
Cass, Christian, Menard, Morgan, Sangamon, and Scott
[[File:William McKendree Springer - Brady-Handy.jpg100px]]
William McKendree Springer
(Springfield)DemocraticnowrapMarch 4, 1875 –
March 3, 1883Elected in 1874.
Re-elected in 1876.
Re-elected in 1878.
Re-elected in 1880.
Redistricted to the .
[[File:James M. Riggs (Illinois Congressman).jpg100px]]
James M. Riggs
(Winchester)DemocraticnowrapMarch 4, 1883 –
March 3, 1887Elected in 1882.
Re-elected in 1884.
Retired.1883–1895
[[File:George A. Anderson (Illinois Congressman).jpg100px]]
George A. Anderson
(Quincy)DemocraticnowrapMarch 4, 1887 –
March 3, 1889Elected in 1886.
Retired.
[[File:ScottWike.jpg100px]]
Scott Wike
(Pittsfield)DemocraticnowrapMarch 4, 1889 –
March 3, 1893Elected in 1888.
Re-elected in 1890.
Lost renomination.
[[File:JohnJamesMcDannold.jpg100px]]
John James McDannold
(Mount Sterling)DemocraticnowrapMarch 4, 1893–
March 3, 1895Elected in 1892.
Retired.
[[File:JGCannon.jpg100px]]
Joseph Gurney Cannon
(Danville)RepublicannowrapMarch 4, 1895–
March 3, 1903Redistricted from the and re-elected in 1894.
Re-elected in 1896.
Re-elected in 1898.
Re-elected in 1900.
Redistricted to the .1895–1903
Iroquois, Kankakee, Vermillion, and Will
[[File:CharlesEugeneFuller.jpg100px]]
Charles Eugene Fuller
(Belvidere)RepublicannowrapMarch 4, 1903–
March 3, 1913Elected in 1902.
Re-elected in 1904.
Re-elected in 1906.
Re-elected in 1908.
Re-elected in 1910.
Lost re-election.1903–1913
Boone, DeKalb, Grundy, Kendall, LaSalle, and Winnebago
[[File:WilliamHHinebaugh.jpg100px]]
William H. Hinebaugh
(Ottawa)ProgressivenowrapMarch 4, 1913–
March 3, 1915Elected in 1912.
Lost re-election.1913–1949
Boone, DeKalb, Grundy, Kendall, LaSalle, and Winnebago
[[File:CharlesEugeneFuller.jpg100px]]
Charles Eugene Fuller
(Belvidere)RepublicannowrapMarch 4, 1915–
June 25, 1926Elected again in 1914.
Re-elected in 1916.
Re-elected in 1918.
Re-elected in 1920.
Re-elected in 1922.
Re-elected in 1924.
Died.
VacantnowrapJune 25, 1926–
March 3, 1927
[[File:John T. Buckbee (Illinois Congressman).jpg100px]]
John T. Buckbee
(Rockford)RepublicannowrapMarch 4, 1927–
April 23, 1936Elected in 1926.
Re-elected in 1928.
Re-elected in 1930.
Re-elected in 1932.
Re-elected in 1934.
Died.
VacantnowrapApril 23, 1936–
January 3, 1937
[[File:NoahMMason.jpg100px]]
Noah M. Mason
(Oglesby)RepublicannowrapJanuary 3, 1937–
January 3, 1949Elected 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 .
[[File:Edgar A. Jonas.png100px]]
Edgar A. Jonas
(Chicago)RepublicanJanuary 3, 1949–
January 3, 1955Elected in 1948.
Re-elected in 1950.
Re-elected in 1952.
Lost re-election.1949–1953
Cook
1953–1963
Cook
[[File:Charles A. Boyle.jpg100px]]
Charles A. Boyle
(Chicago)DemocraticnowrapJanuary 3, 1955–
November 4, 1959Elected in 1954.
Re-elected in 1956.
Re-elected in 1958.
Died.
VacantnowrapNovember 4, 1959–
January 3, 1961
[[File:Edward Rowan Finnegan.jpg100px]]
Edward Rowan Finnegan
(Chicago)DemocraticnowrapJanuary 3, 1961–
January 3, 1963Elected in 1960.
Redistricted to the .
[[File:Robert McClory.jpg100px]]
Robert McClory
(Lake Bluff)RepublicanJanuary 3, 1963–
January 3, 1973Elected in 1962.
Re-elected in 1964.
Re-elected in 1966.
Re-elected in 1968.
Re-elected in 1970.
Redistricted to the .1963–1967
Boone, Lake, and McHenry
1967–1973
Cook, Lake, and McHenry
[[File:PhilCrane.jpg100px]]
Phil Crane
(McHenry)RepublicanJanuary 3, 1973–
January 3, 1993Elected 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 .1973–1983
Cook and Lake
1983–1993
Cook, Lake, and McHenry
[[File:Rep Jerry Costello.jpg100px]]
Jerry Costello
(Belleville)DemocraticJanuary 3, 1993–
January 3, 2013Redistricted 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.1993–2003
Alexander, Jackson, Madison, Monroe, Perry, Randolph, St. Clair, Union, and Williamson
2003–2013
[[File:Illinois' 12th congressional district.png300px]]
Alexander, Franklin, Jackson, Madison, Monroe, Perry, Pulaski, Randolph, St. Clair, Union, Williamson
[[File:Enyart official portrait.jpg100px]]
William Enyart
(Belleville)DemocraticnowrapJanuary 3, 2013–
January 3, 2015Elected in 2012.
Lost re-election.2013–2023
[[File:Illinois US Congressional District 12 (since 2013).tif300px]]
Alexander, Franklin, Jackson, Jefferson, Madison, Monroe, Perry, Pulaski, Randolph, St. Clair, Union, and Williamson
[[File:Mike Bost official photo.jpg100px]]
Mike Bost
(Murphysboro)RepublicanJanuary 3, 2015–
presentElected in 2014.
Re-elected in 2016.
Re-elected in 2018.
Re-elected in 2020.
Re-elected in 2022.
Re-elected in 2024.
2023–present
[[File:Illinois's 12th congressional district (since 2023) (new version).svg300px]]
Alexander, 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

Main article: United States House of Representatives elections in Illinois, 2012

2014

2016

2018

2020

2022

2024

References

Sources

References

  1. "My Congressional District".
  2. "2025 Cook PVI℠: District Map and List (119th Congress)".
  3. [http://elections.il.gov/Downloads/VotingInformation/PDF/2011Districts/2011CongDist12.pdf Illinois Congressional District 12] {{Webarchive. link. (January 26, 2017 , Illinois Board of Elections)
  4. "DRA 2020".
  5. "2012 General Election Official Vote Totals". Illinois State Board of Elections.
  6. (2014-11-04). "Illinois General Election 2014". Illinois State Board of Elections.
  7. (2016-11-08). "Illinois General Election 2016". Illinois State Board of Elections.
  8. "2018 General Election Official Vote Totals Book".
  9. (2020-12-04). "Election Results 2020 GENERAL ELECTION". [[Illinois State Board of Elections]].
  10. (November 20, 2020). "Illinois 2020 Election Results". [[Chicago Sun-Times]].
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