congressional districtIllinois 12th Congressional District
presidential margin
2004–2024 · Democratic minus Republican
2004R+20.1
2008R+10.0
2012R+26.3
2016R+42.5
2020R+42.8
2024R+43.3
net swing · 2004→2024R+23.1R+20.1 → R+43.3
vs. U.S. · 2024R+41.8R+43.3 vs R+1.5
presidential returns
2024 turnout 64.6% of 577,709 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
102,187
263,560
7,313
373,060
577,709
64.6%
2020
106,245
270,231
6,867
383,343
593,767†
64.6%
2016
95,450
251,709
20,162
367,321
605,201†
60.7%
2012
125,352
214,822
69
340,243
608,975†
55.9%
2008
161,198
198,158
9,719
369,075
599,327†
61.6%
2004
144,606
218,126
2,455
365,187
589,679†
61.9%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
District by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupIL-12IllinoisUnited States
German26.1%16.1%12.5%
English12.5%6.9%9.5%
Irish11.8%10.6%9.4%
American6.7%3.3%5.3%
Italian2.7%5.4%4.8%
Polish2.3%6.0%2.2%
French2.1%0.7%1.6%
Scottish1.7%—1.3%
African American†4.8%12.1%9.9%
Mexican1.7%14.4%11.3%
Puerto Rican0.3%1.7%1.8%
Filipino0.2%1.0%0.9%
Korean0.1%0.4%0.4%
Asian Indian0.1%2.1%1.4%
Chinese0.1%1.0%1.3%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
IL-12
Illinois
United States
Median age
41.6
39.1
39.1
Age 18–24
8.5%
9.1%
9.2%
Age 65 and older
19.7%
16.9%
17.2%
Household economy
Measure
IL-12
Illinois
United States
Median household income
$68,540
$83,390
$84,427
Poverty rate
13.1%
11.8%
12.5%
Bachelor's degree or higher (25+)
24.6%
37.9%
35.6%
Languages at home
Measure
IL-12
Illinois
United States
Speaks a non-English language at home
3.9%
24.1%
22.3%
Spanish
2.0%
14.0%
13.6%
Religious landscape
Measure
IL-12
Illinois
United States
Catholic
—
24.2%
18.6%
Evangelical Protestant
—
11.7%
16.5%
Unclaimed / not counted
—
49.2%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Illinois 12th Congressional District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
−20.1%
2008
−10.0%
2012
−26.3%
2016
−42.5%
2020
−42.8%
2024
−43.3%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Federal officeholders only. State and local officeholders are planned for the next data pass.
Congressional elections · 25 House races
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.
Source · MIT Election Lab (MEDSL), House. CC-BY 4.0.
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
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 87% 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.
Akashic
Political twins — districts
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Illinois 12th Congressional District. Akashic. https://akashic.app/cd/1712/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Embed this page
A live widget for your site — no API key, attribution built in, CC BY 4.0. All widgets & sizes →
How did Illinois 12th Congressional District vote in 2024?
In 2024, Illinois 12th Congressional District voted Republican by 43.3 points (R+43.3), carried by the Republican candidate. Out of 373,060 votes cast, 102,187 went Democratic and 263,560 went Republican.
How many people live in Illinois 12th Congressional District?
Illinois 12th Congressional District has a population of 753,638 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Illinois 12th Congressional District?
Median household income in Illinois 12th Congressional District is $68,540 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Illinois 12th Congressional District?
Akashic tracks 6 presidential elections in Illinois 12th Congressional District from 2004 to 2024. Of those, 0 went Democratic and 6 went Republican.
