akashic
1876–2024
Congressional District 12·Illinois

Illinois 12th Congressional District delivered R+43 in 2024.

A southern Illinois district that has shifted toward Republicans by double digits over two decades

2008 — 2024·5 elections
IL
LatestR+43in 2024
TypologyFarm Beltcluster typology
Population868,1132024 ACS

Illinois 12th Congressional District: Farm Belt district. In 2024, voted R+43%. Republican peak: R+43 in 2024.

Key facts

2024 presidential margin
R+43MIT Election Lab
Political typology
Farm BeltAkashic typology
Population
868,1132024 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 Republican margin
R+43 in 2016MIT Election Lab
DW-NOMINATE
Member ideology
R
BOST, MikeCongress 119 · Republican
DW-NOMINATE first-dimension (economic) score0.40 sits at approximately the 70th percentile.00.40−1 liberal+1 conservative
BOST scores 0.40 on the first NOMINATE dimension (−1 most liberal, +1 most conservative).

Predecessors: ENYART, Bill (2013–2015), COSTELLO, Jerry Francis (2011–2013), COSTELLO, Jerry Francis (2009–2011), COSTELLO, Jerry Francis (2007–2009)

Source · Voteview / Lewis, Poole, Rosenthal et al. (CC-BY).
2024 presidential election
Congressional District 12
TrumpR+43
—
2024 presidential margin by county for Congressional District 12, ILA map of the constituent counties of Congressional District 12, IL, each outlined and filled by its 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic).Clinton County, IL · R+52Washington County, IL · R+57Perry County, IL · R+52Monroe County, IL · R+36Jackson County, IL · D+3Randolph County, IL · R+50Jasper County, IL · R+65Wabash County, IL · R+54Edwards County, IL · R+71Pulaski County, IL · R+34Saline County, IL · R+49Alexander County, IL · R+19Jefferson County, IL · R+48Wayne County, IL · R+71Richland County, IL · R+53Hamilton County, IL · R+63Massac County, IL · R+49Lawrence County, IL · R+56Williamson County, IL · R+39Coles County, IL · R+28Clay County, IL · R+67Hardin County, IL · R+62Union County, IL · R+43Effingham County, IL · R+60Crawford County, IL · R+52White County, IL · R+59Cumberland County, IL · R+62Gallatin County, IL · R+54Clark County, IL · R+51Pope County, IL · R+60Johnson County, IL · R+58St. Clair County, IL · D+8Marion County, IL · R+49Franklin County, IL · R+51
How it voted
Share of the 2024 vote
Donald Trump ✓Republican70.6%263,560
Kamala HarrisDemocratic27.4%102,187
OtherAll other candidates2.0%7,313
D+60
R+60
34 counties, each filled by 2024 D-vs-R margin. Hover any county for its result.
presidential history
Presidential margin, 2008–2024
Democratic minus Republican, by election
Presidential margin over timeDemocratic-minus-Republican presidential margin from 2008 to 2024. Most recent: −43.3% in 2024.−43.3%DR20082024
Presidential margin over time
YearMargin (D minus R)
2008−10.0%
2012−26.3%
2016−42.5%
2020−42.8%
2024−43.3%
DemocraticRepublican
5 presidential elections
Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
YearWonMarginDemocraticRepublicanTotal
R
−43.3%
102,187263,560373,060
R
−42.8%
106,245270,231383,343
R
−42.5%
95,450251,709367,321
R
−26.3%
125,328214,837340,165
R
−10.0%
161,198198,158369,075
Congressional elections · 16 Senate races

U.S. Senate

Source · MIT Election Lab (MEDSL), Senate. CC-BY 4.0.
YearWonD %R %Total
2022O0.0%41.5%4,098,896
2020D54.9%38.9%5,968,901
2016D54.9%39.8%5,491,878
2014D53.5%42.7%3,603,519
2010R46.4%48.0%3,704,473
2008D67.8%28.5%5,329,884
2004D70.0%27.0%5,141,520
2002D60.3%38.0%3,486,851
1998R47.4%50.3%3,394,521
1996D56.1%40.7%4,250,722
1992D53.3%43.1%4,939,558
1990D65.1%34.9%3,251,005
1986D65.1%33.7%3,122,883
1984D50.1%48.2%4,787,335
1980D56.0%42.5%4,580,029
1978R45.5%53.3%3,184,764

Demographics

2024 ACS
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.
2024 ACS
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%
<5
2.6%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Median household income
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.
2024 ACS
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.
2024 ACS
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.
2020 religion census
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.

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 forty-three points in 2024. The 2024 margin was forty-three points.

A population of 868,113, a 82% non-Hispanic-white share, and a median household income of $67,448 describe the district.

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.
Congressional District 12, Illinois. Akashic. https://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 43.3 points (R+43), carried by the Republican candidate. Out of 373,060 votes cast, 102,187 went Democratic and 263,560 went Republican.
What is Congressional District 12, Illinois's political typology?
Akashic places Congressional District 12, Illinois in the "Farm Belt" typology. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 5 elections in the dataset, the district has voted Democratic 0 times, Republican 5 times, and other 0 times.
How many people live in Congressional District 12, Illinois?
Congressional District 12, Illinois has a population of 868,113 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 5 presidential elections in Congressional District 12, Illinois from 2008 to 2024. Of those, 0 went Democratic and 5 went Republican. The district's typology — "Farm Belt" — captures where that record, its demographics, and its recent swing place it among American communities.