# Illinois's 18th congressional district

The 18th congressional district of Illinois covered central and western Illinois, including all of Jacksonville and Quincy and parts of Bloomington, Peoria, and Springfield. It covered much of the territory represented by Abraham Lincoln during his single term in the House.
It was last represented by Republican Darin LaHood, who took office in September 2015 following a special election.
Republican Aaron Schock previously represented the district from January 2009 until his resignation in March 2015. 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 of Bradley University. Due to reapportionment after the 2020 U.S. census, the 18th district was eliminated ahead of the 2022 elections.

## 2011 redistricting

The district covered parts of McLean, Peoria, Sangamon, Stark and Tazewell counties, and all of Adams, Brown, Cass, Hancock, Logan, Marshall, Mason, McDonough, Menard, Morgan, Pike, Schuyler, Scott and Woodford counties, as of the 2011 redistricting which followed the 2010 census. All or parts of Bloomington, Chatham, Jacksonville, Lincoln, Macomb, Morton, Normal, Peoria, Quincy and Springfield 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.

### Future

Due to Illinois losing population in the 2020 United States census, the district was eliminated in January 2023.

## Election results from statewide races

| Year | Office | Results |
| 2008 | President | McCain 54% - 44% |
| 2012 | President | Romney 61% - 37% |
| 2016 | President | Trump 60% - 33% |
| 2016 | Senate | Kirk 59% - 35% |
| 2016 | Comptroller (Spec.) | Munger 64% - 31% |
| 2018 | Governor | Rauner 55% - 33% |
| 2018 | Attorney General | Harold 65% - 32% |
| 2018 | Secretary of State | White 53% - 45% |
| 2018 | Comptroller | Senger 56% - 40% |
| 2018 | Treasurer | Dodge 57% - 40% |
| 2020 | President | Trump 61% - 37% |
| 2020 | Senate | Curran 60% - 37% |

## List of members representing the district

| 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 the 20th district. |
| William R. Morrison (Waterloo) | Democratic | March 4, 1883 – March 3, 1887 | 48th 49th | Redistricted from the 17th district and re-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 | Vacant | July 14, 1895 – December 2, 1895 | 54th | |
| William F. L. Hadley (Edwardsville) | Republican | December 2, 1895 – March 3, 1897 | 54th | 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 the 12th district and re-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 the 23rd 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. |
| 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. |
| Vacant | 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 the 16th district. |
| District eliminated January 3, 2023 |||||

## Recent election results

Illinois's 18th congressional district: Results 1994–2015 :
| Year | Democrat | Votes | Pct | Republican | Votes | Pct | |
| 1994 | G. Douglas Stephens | 78,332 | 39% | Ray LaHood | 119,838 | 60% | * |
| 1996 | Mike Curran | 98,413 | 41% | Ray LaHood | 143,110 | 59% | |
| 1998 | (no candidate) | | | Ray LaHood | 158,175 | 100% | * |
| 2000 | Joyce Harant | 85,317 | 33% | Ray LaHood | 173,706 | 67% | |
| 2002 | (no candidate) | | | Ray LaHood | 192,567 | 100% | |
| 2004 | Steve Waterworth | 91,548 | 30% | Ray LaHood | 216,047 | 70% | |
| 2006 | Steve Waterworth | 73,052 | 33% | Ray LaHood | 150,194 | 67% | |
| 2008 | Colleen Callahan | 117,642 | 38% | Aaron Schock | 182,589 | 59% | * |
| 2010 | Deirdre "D.K." Hirner | 57,046 | 26% | Aaron Schock | 152,868 | 69% | * |
| 2012 | Steve Waterworth | 85,164 | 26% | Aaron Schock | 244,467 | 74% | |
| 2014 | Darrel Miller | 62,377 | 25% | Aaron Schock | 184,363 | 75% | |
| 2015 (special) | Rob Mellon | 15,840 | 31% | Darin LaHood | 34,907 | 69% | |
| 2016 | Junius Rodriguez | 96,770 | 27.86% | Darin LaHood | 250,506 | 72.13% | |
| 2018 | Junius Rodriguez | 95,486 | 32.8% | Darin LaHood | 195,927 | 67.2% | |
| 2020 | George Petrilli | 110,039 | 29.59% | Darin LaHood | 261,840 | 70.41% | |
* Write-in and minor candidate notes: In 1994, write-ins received 955 votes. In 1998, write-ins received 2 votes. In 2008, Green Party candidate Sheldon Schafer received 9,857 votes. In 2010, Schafer received 11,256 votes.

### 2008

Ray LaHood decided not to seek re-election in 2008 and was chosen by Barack Obama to serve as U.S. Secretary of Transportation. Illinois State Representative Aaron Schock of Peoria won the seat for the Republicans in the November 4, 2008 election. His main opponent was Democrat Colleen Callahan, of Kickapoo, a radio and television broadcaster. Green Party candidate and educator Sheldon Schafer, of Peoria, was in a distant third place on the ballot.
Illinois's 18th congressional district election, 2008 :
| Party | Party | Candidate | Votes | % |
| | Republican | Aaron Schock | 182,589 | 58.88 |
| | Democratic | Colleen Callahan | 117,642 | 37.94 |
| | Green | Sheldon Schafer | 9,857 | 3.18 |
| Total votes | Total votes | Total votes | 310,088 | 100.00 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2010

Illinois's 18th district general election, November 2, 2010$^{:50}$ :
| Party | Party | Candidate | Votes | % |
| | Republican | Aaron Schock (incumbent) | 152,868 | 69.12 |
| | Democratic | Deirdre "DK" Hirner | 57,046 | 25.79 |
| | Green | Sheldon Schafer | 11,256 | 5.09 |
| Total votes | Total votes | Total votes | 221,170 | 100.00 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2012

Illinois's 18th congressional district, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Aaron Schock (incumbent) | 244,467 | 74.2 |
| | Democratic | Steve Waterworth | 85,164 | 25.8 |
| Total votes | Total votes | Total votes | 329,631 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2014

Illinois's 18th congressional district, 2014 :
| Party | Party | Candidate | Votes | % |
| | Republican | Aaron Schock (Incumbent) | 184,363 | 74.7 |
| | Democratic | Darrel Miller | 62,377 | 25.3 |
| Total votes | Total votes | Total votes | 246,740 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2015 special election

Illinois's 18th congressional district special election, 2015 :
| Party | Party | Candidate | Votes | % |
| | Republican | Darin LaHood | 35,329 | 68.8 |
| | Democratic | Rob Mellon | 15,979 | 31.1 |
| | Write-In | Constant "Conner" Vlakancic | 7 | >0.0 |
| | Write-In | Roger K. Davis | 4 | >0.0 |
| Total votes | Total votes | Total votes | 51,319 | 100 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2016

Illinois's 18th congressional district, 2016 :
| Party | Party | Candidate | Votes | % |
| | Republican | Darin LaHood (incumbent) | 250,506 | 72.1 |
| | Democratic | Junius Rodriguez | 96,770 | 27.9 |
| | Independent | Don Vance (write-in) | 7 | 0.0 |
| Total votes | Total votes | Total votes | 347,283 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2018

Illinois's 18th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | Darin LaHood (incumbent) | 195,927 | 67.2 |
| | Democratic | Junius Rodriguez | 95,486 | 32.8 |
| Total votes | Total votes | Total votes | 291,413 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2020

Illinois's 18th congressional district, 2020 :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Darin LaHood (incumbent) | 261,840 | 70.41 | +3.18% |
| | Democratic | George Petrilli | 110,039 | 29.59 | −3.18% |
| Total votes | Total votes | Total votes | 371,879 | 100.0 | |
| | Republican hold | Republican hold | Republican hold | Republican hold | Republican hold |