Congressional District 12 Congressional District (IL) — Elections 1876–2024

Illinois 12th Congressional District, Illinois: Republican loyalist district. In 2024, voted R+34%. Republican peak: R+34 in 2024.

Key facts

2024 presidential margin: R+34MIT Election Lab
Political archetype: Republican loyalistAkashic typology
Population: 868,1222024 5-year
Median household income: $67,4482024 5-year
White (non-Hispanic): 82.4%2024 5-year
Black: 9.8%2024 5-year
Hispanic / Latino: 3.4%2024 5-year
Peak Democratic margin: D+24 in 1932MIT Election Lab
Peak Republican margin: R+34 in 2024MIT Election Lab

2024 results by constituent county

40 counties · 2 D · 38 R

R+60

D+60

One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.

38 presidential elections

Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
Year	Won	Margin	Democratic	Republican	Total
2024	R	−34.3%	135,542	280,566	423,227
2020	R	−32.6%	144,063	288,395	442,139
2016	R	−32.6%	131,464	269,661	424,164
2012	R	−15.9%	167,403	232,692	409,472
2008	R	−2.1%	207,582	216,430	431,402
2004	R	−13.0%	182,528	237,617	422,996
2000	R	−5.7%	178,285	200,443	389,141
1996	D	+10.2%	182,521	144,871	370,700
1992	D	+15.9%	206,075	138,837	421,717
1988	R	−0.9%	188,567	191,975	382,450
1984	R	−15.9%	171,396	236,368	409,560
1980	R	−14.5%	164,142	222,829	405,514
1976	D	+6.4%	216,021	189,535	410,677
1972	R	−19.6%	160,388	238,786	400,862
1968	R	−6.8%	163,260	190,520	398,054
1964	D	+22.5%	248,023	156,780	404,803
1960	R	−5.2%	203,027	225,491	429,121
1956	R	−10.6%	183,449	226,957	410,911
1952	R	−8.9%	192,121	229,647	422,586
1948	D	+2.5%	186,022	177,039	366,163
1944	R	−6.5%	180,512	205,753	388,694
1940	D	+0.0%	235,652	235,524	474,184
1936	D	+11.9%	242,109	189,731	441,165
1932	D	+23.8%	232,617	141,800	382,074
1928	R	−7.8%	156,250	182,943	341,844
1924	R	−10.0%	115,981	146,933	309,529
1920	R	−21.7%	102,656	165,570	289,453
1916	R	−2.2%	155,092	162,355	327,889
1912	D	+13.3%	78,002	54,701	175,774
1908	R	−3.7%	82,151	88,802	179,403
1904	R	−13.4%	63,584	85,046	160,185
1900	D	+0.1%	82,018	81,848	167,367
1896	D	+1.6%	81,845	79,258	163,091
1892	D	+2.8%	66,938	63,027	141,585
1888	—	No data	—	—	—
1884	—	No data	—	—	—
1880	—	No data	—	—	—
1876	—	No data	—	—	—

Demographics

Race, ethnicity, and ancestry

Click any group to see the ancestries typically reported within it.

German

24.3%

English

11.6%

Irish

11.0%

American

6.2%

Italian

2.5%

Polish

2.0%

French

1.8%

Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.

Age distribution by sex

Median age: 41.2 in this county, 39.1 nationally

Male

Age

Female

0.9%

85+

1.6%

2.5%

75–84

3.2%

5.6%

65–74

5.9%

6.9%

55–64

6.9%

6.1%

45–54

5.8%

6.5%

35–44

6.1%

6.3%

25–34

5.8%

4.5%

18–24

4.0%

8.3%

5–17

7.9%

2.8%

2.6%

Source · American Community Survey 5-year estimates, 2024 release.

Median household income

2024 inflation-adjusted dollars

$67,448

Congressional District 12 ranks near the middle of US counties.

Congressional District 12$67,448

Illinois$83,390

United States$80,734

Source · American Community Survey 5-year estimates, 2024 release.

Poverty rate

All persons below federal poverty line

14.2%

Children face moderate poverty.

Children under 1818.3%

Working age (18–64)13.2%

Seniors (65+)11.2%

Source · American Community Survey 5-year estimates, 2024 release.

Language at home

Population aged 5 and older

96.1%

speak English only

Spanish2.0%

Other Indo-European1.1%

Asian & Pacific Islander0.6%

Other languages0.2%

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Baptist

15.0%

Other Christian

10.9%

Catholic & Orthodox

10.3%

Mainline Protestant

5.7%

Methodist

3.7%

Pentecostal & Holiness

2.2%

Non-Christian

0.8%

Source · 2020 US Religion Census. Remaining 51.4% of residents not counted as adherents by any reporting body.

Illinois 12th Congressional District sits in the Upper Midwest. Its political identity has been Republican for as long as anyone now living can remember. 2 consecutive presidential elections in modern records have gone for the Republican candidate, often by margins that would be considered landslide territory anywhere else.

The Republican margin in Illinois 12th Congressional District reached its widest at thirty-four points in 2024. The margin in 2024 was thirty-four points, in line with the district's deep historical pattern.

Its loyalty is rooted in its place. Median household income of $67,448, a 82% non-Hispanic-white share, and a population of 868,122 together describe a district whose political habits are deeply settled.

Cite this page

All citations released under CC BY 4.0. Attribution: Akashic Intelligence.

Congressional District 12, Illinois — The Long Memory. Akashic Intelligence — The Long Memory. https://tiers.akashic.app/cd/1712/. Accessed May 20, 2026. License: CC BY 4.0.

License: CC BY 4.0

Frequently asked questions

How did Congressional District 12, Illinois vote in 2024?

In 2024, Congressional District 12, Illinois voted Republican by 34.3 points (R+34), carried by the Republican candidate. Out of 423,227 votes cast, 135,542 went Democratic and 280,566 went Republican.

What is Congressional District 12, Illinois's political archetype?

Akashic classifies Congressional District 12, Illinois as a "Republican loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 12 times, Republican 22 times, and other 0 times.

When did Congressional District 12, Illinois last vote Democratic?

The most recent presidential election in which Congressional District 12, Illinois voted Democratic was 1996.

How many people live in Congressional District 12, Illinois?

Congressional District 12, Illinois has a population of 868,122 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.

What is the median household income in Congressional District 12, Illinois?

Median household income in Congressional District 12, Illinois is $67,448 — below the national median of $80,734. The Illinois state median is $83,390.

What is the political history of Congressional District 12, Illinois?

Akashic tracks 38 presidential elections in Congressional District 12, Illinois from 1876 to 2024. Of those, 12 went Democratic and 22 went Republican. The district's archetype — "Republican loyalist" — captures the overall trajectory of that voting record.

Illinois 12th Congressional District has voted Republican in seven straight presidential cycles.

Key facts

Demographics

Frequently asked questions