Illinois 12th Congressional District
Akashic| Year | Margin (D minus R) |
|---|---|
| 2008 | −10.0% |
| 2012 | −26.3% |
| 2016 | −42.5% |
| 2020 | −42.8% |
| 2024 | −43.3% |
Federal officeholders only. State and local officeholders are planned for the next data pass.
U.S. House
Each result reflects the U.S. House district as it was drawn for that election; redistricting has redrawn these lines over time, so they can differ from the current 120th-Congress district shown on the map above.
| Year | District | Won | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | 12 | R | 25.8%94,875 | 74.2%272,754 | 367,629 |
| 2022 | 12 | R | 25.0%72,791 | 75.0%218,379 | 291,171 |
| 2020 | 12 | R | 39.6%127,577 | 60.4%194,839 | 322,416 |
| 2018 | 12 | R | 45.4%118,724 | 51.6%134,884 | 261,543 |
| 2016 | 12 | R | 39.7%124,246 | 54.3%169,976 | 313,002 |
| 2014 | 12 | R | 41.9%87,860 | 52.5%110,038 | 209,738 |
| 2012 | 12 | D | 51.7%157,000 | 42.7%129,902 | 303,949 |
| 2010 | 12 | D | 59.8%121,272 | 36.5%74,046 | 202,705 |
| 2008 | 12 | D | 71.4%212,891 | 24.9%74,382 | 298,181 |
| 2006 | 12 | D | 100.0%157,284 | 0.0%0 | 157,291 |
| 2004 | 12 | D | 69.5%198,962 | 28.9%82,677 | 286,435 |
| 2002 | 12 | D | 69.2%131,580 | 30.8%58,440 | 190,020 |
| 2000 | 12 | D | 100.0%183,208 | 0.0%0 | 183,257 |
| 1998 | 12 | D | 60.4%99,605 | 39.6%65,409 | 165,014 |
| 1996 | 12 | D | 71.6%150,005 | 26.6%55,690 | 209,519 |
| 1994 | 12 | D | 65.9%101,391 | 34.1%52,419 | 153,810 |
| 1992 | 12 | D | 71.2%168,762 | 28.8%68,115 | 236,877 |
| 1990 | 12 | R | 0.0%0 | 82.2%113,081 | 137,531 |
| 1988 | 12 | R | 24.8%54,769 | 75.2%165,913 | 220,682 |
| 1986 | 12 | R | 22.3%25,536 | 77.7%89,044 | 114,580 |
| 1984 | 12 | R | 22.2%45,537 | 77.8%159,582 | 205,119 |
| 1982 | 12 | R | 30.7%40,108 | 66.2%86,487 | 130,701 |
| 1980 | 12 | R | 25.9%64,729 | 74.1%185,080 | 249,818 |
| 1978 | 12 | R | 20.5%28,424 | 79.5%110,503 | 138,935 |
| 1976 | 12 | R | 27.2%56,644 | 72.8%151,899 | 208,553 |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | D | 56.8%2,329,136 | 41.5%1,701,055 | 4,098,896 |
| 2020 | D | 54.9%3,278,930 | 38.9%2,319,870 | 5,968,901 |
| 2016 | D | 54.9%3,012,940 | 39.8%2,184,692 | 5,491,239 |
| 2014 | D | 53.5%1,929,637 | 42.7%1,538,522 | 3,603,475 |
| 2010 | R | 46.4%1,719,478 | 48.0%1,778,698 | 3,703,370 |
| 2008 | D | 67.8%3,615,844 | 28.5%1,520,621 | 5,329,883 |
| 2004 | D | 70.0%3,597,456 | 27.1%1,390,690 | 5,138,563 |
| 2002 | D | 60.3%2,103,766 | 38.0%1,325,703 | 3,486,851 |
| 1998 | R | 47.4%1,610,496 | 50.3%1,709,041 | 3,394,521 |
| 1996 | D | 56.1%2,384,028 | 40.7%1,728,824 | 4,246,494 |
| 1992 | D | 53.3%2,631,229 | 43.1%2,126,833 | 4,939,530 |
| 1990 | D | 65.1%2,115,377 | 34.9%1,135,628 | 3,251,005 |
| 1986 | D | 65.1%2,033,783 | 33.7%1,053,734 | 3,122,883 |
| 1984 | D | 50.1%2,397,165 | 48.2%2,308,039 | 4,787,335 |
| 1980 | D | 56.0%2,565,302 | 42.5%1,946,296 | 4,579,933 |
| 1978 | R | 45.5%1,448,187 | 53.3%1,698,711 | 3,184,605 |
IL-12 covers a swath of southern and southwestern Illinois where post-industrial river towns and rural counties have moved steadily rightward since the early 2000s, producing a 2024 presidential margin of R+15.4.
Across the recorded series it reached a Republican high of 43.3 points in 2024. The 2024 margin was 43.3 points.
A population of 753,638, a 88% non-Hispanic-white share, and a median household income of $68,540 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 15 and Congressional District 8.
The congressional districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Illinois 12th Congressional District. Akashic. https://akashic.app/cd/1712/. Accessed May 20, 2026. License: CC BY 4.0.