Religious adherence is published only at the county level (U.S. Religion Census). See Cook County.
American Community Survey 2024 5-year (income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024.
Illinois 31st State House District
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Illinois 31st State House DistrictHarrisD+42.2
20082024
How it voted
Share of the 2024 vote
Kamala Harris ✓Democratic
70.4%
27,096
Donald TrumpRepublican
28.2%
10,858
Robert F. Kennedy Jr.Independent
1.4%
533
D+60R+60
District boundary, filled by its own 2024 D-vs-R margin — precinct detail where available, over the 1 county it's drawn from (shown faint).
The precinct map shows the 2024 presidential vote; the timeline scrubs the district’s overall result across 1892–2024, on its current boundaries.
County-level results (1 county) — table
2024 presidential result by county for Illinois 31st State House District — winner and D-vs-R margin.
County
Winner
Margin
Cook County, IL
Democratic
D+41.6
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5 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
Year
Won
Democratic
Republican
Other
Margin
Total
D
70.4%Harris27,096
28.2%Trump10,858
1.4%Kennedy533
+42.2%
38,487
D
77.5%Biden36,225
21.3%Trump9,942
1.2%Jorgensen546
+56.3%
46,713
D
79.5%Clinton37,289
17.3%Trump8,117
3.2%Johnson1,479
+62.2%
46,885
D
85.9%Obama40,755
14.1%Romney6,663
0.0%
+71.9%
47,418
D
85.3%Obama43,949
13.9%McCain7,184
0.8%Nader418
+71.3%
51,551
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presidential history
Presidential margin, 2008–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2008
+71.3%
2012
+71.9%
2016
+62.2%
2020
+56.3%
2024
+42.2%
DemocraticRepublican
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current representation
Current officeholders
DMike CrawfordState House · 31
State legislative officeholder from OpenStates nightly current-legislator data.
With a 2024 presidential margin of D+41.5, this district ranks among the state's most reliably left-leaning constituencies, suggesting a dense urban core and a voter base that has shifted sharply in one partisan direction over recent cycles.
Across the recorded series it reached a Democratic high of 71.9 points in 2012. Between 2020 and 2024 the district moved 14.1 points toward the Republican candidate; the 2024 margin was 42.2 points.
A population of 108,638, a 34% non-Hispanic-white share, and a median household income of $60,483 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 28 and State House District 27.
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Political twins — state-house districts
The state-house 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.
How did Illinois 31st State House District vote in 2024?
In 2024, Illinois 31st State House District voted Democratic by 42.2 points (D+42.2), carried by the Democratic candidate. Out of 38,487 votes cast, 27,096 went Democratic and 10,858 went Republican.
How many people live in Illinois 31st State House District?
Illinois 31st State House District has a population of 108,638 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Illinois 31st State House District?
Median household income in Illinois 31st State House District is $60,483 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Illinois 31st State House District?
Akashic tracks 5 presidential elections in Illinois 31st State House District from 2008 to 2024. Of those, 5 went Democratic and 0 went Republican.
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