HarrisDemocratic64.7%213,642TrumpRepublican33.1%109,364OtherAll other candidates2.1%7,041
D+31.6- Lead
- 104,278
- Total
- 330,047
- vs nation
- D+33.1
modeled Census-place estimatemodeled estimate
Akashiccongressional district
Illinois 1st Congressional District
Office (updates table and map)
President margin by year
Place winner margin
District by 2024 margin · Precinct returns · VEST · MIT Election Lab
The precinct map shows the 2024 presidential vote; the timeline scrubs the district’s overall result across 1892–2024, on its current boundaries.
President results by year
Modeled candidate-vote estimate on current district boundaries
BidenDemocratic70.4%260,443TrumpRepublican28.1%103,858OtherAll other candidates1.5%5,528
D+42.3- Lead
- 156,585
- Total
- 369,829
- vs nation
- D+37.9
modeled Census-place estimatemodeled estimate
ClintonDemocratic71.9%258,525TrumpRepublican24.0%86,095OtherAll other candidates4.1%14,839
D+48.0- Lead
- 172,430
- Total
- 359,459
- vs nation
- D+45.9
exact aggregate
ObamaDemocratic73.1%241,015RomneyRepublican25.9%85,283OtherAll other candidates1.0%3,222
D+47.3- Lead
- 155,732
- Total
- 329,520
- vs nation
- D+43.4
modeled Census-place estimatemodeled estimate
ObamaDemocratic75.8%264,901McCainRepublican23.5%82,215OtherAll other candidates0.7%2,441
D+52.3- Lead
- 182,686
- Total
- 349,557
- vs nation
- D+45.0
modeled Census-place estimatemodeled estimate
KerryDemocratic71.2%227,727BushRepublican28.5%91,067OtherAll other candidates0.3%1,093
D+42.7- Lead
- 136,660
- Total
- 319,887
- vs nation
- D+45.2
modeled Census-place estimatemodeled estimate
GoreDemocratic72.7%199,750BushRepublican26.3%72,174OtherAll other candidates1.1%2,998
D+46.4- Lead
- 127,576
- Total
- 274,922
- vs nation
- D+45.9
modeled Census-place estimatemodeled estimate
ClintonDemocratic72.4%176,689DoleRepublican21.9%53,377OtherAll other candidates5.7%13,959
D+50.5- Lead
- 123,312
- Total
- 244,025
- vs nation
- D+42.0
modeled Census-place estimatemodeled estimate
Key facts
- 2024 presidential margin
- D+31.6MIT Election Lab
- Population
- 753,6242024 5-year
- Population density
- 1,232 / sq mi2024 5-year · TIGER/Line
- Land area
- 612 sq miTIGER/Line
- Median household income
- $71,4652024 5-year
- White (non-Hispanic)
- 36.1%2024 5-year
- Black
- 49.3%2024 5-year
- Hispanic / Latino
- 9.2%2024 5-year
- Peak Democratic margin
- D+55.9 in 1936MIT Election Lab
- Peak Republican margin
- R+18.8 in 1920MIT Election Lab
- Most similar
- Congressional District 12, MI · twin score 94.8
presidential history
Party record book
Illinois 1st Congressional District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Lyndon B. Johnson1964
77.7%
225,086 votes · D+55.3 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 76.7%
Republican
Warren G. Harding1920
56.0%
43,155 votes · R+18.8 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 48.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
264,901votes
75.8% of the vote · D+52.3 · modeled estimate
Runner-up · Joe Biden, 2020 · 260,443 votes
Republican
Donald Trump2024
109,364votes
33.1% of the vote · D+31.6 · modeled estimate
Runner-up · Donald Trump, 2020 · 103,858 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
Al Smith1928
+48.7pts D vs U.S.
Place D+31.3 · U.S. R+17.5 · modeled estimate
Runner-up · Walter Mondale, 1984 · +47.0 pts
Republican
Warren G. Harding1920
−7.4pts R vs U.S.
Place R+18.8 · U.S. R+26.2 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · −10.9 pts
current representation
Current officeholders
Federal officeholders only. State and local officeholders are planned for the next data pass.
U.S. House elections · 25 House
Senate and governor results are in the Office selector at the top of this page.
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.
Anchored in Chicago's South Side, IL-01 delivered a 31.6-point Democratic presidential margin in 2024, reflecting a dense, majority-Black urban electorate that has made this district among the most reliably partisan in the Midwest.
Across the recorded series it reached a Democratic high of 55.9 points in 1936 and a Republican high of 18.8 points in 1920. Between 2020 and 2024 the district moved 10.7 points toward the Republican candidate; the 2024 margin was 31.6 points.
A population of 753,624, a 36% non-Hispanic-white share, and a median household income of $71,465 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 12 and Congressional District 2.
Political twins — districts
The congressional districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Congressional District 12
Michigan
94.8twin score
2008–2020 trajectory≠ college share
Congressional District 2
Illinois
94.6twin score
2008–2016 trajectory% Black≠ elasticity
Congressional District 13
Michigan
94.0twin score
2008–2016 trajectory12-yr trend≠ college share
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.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Illinois 1st Congressional District. Akashic. https://akashic.app/cd/1701/. Accessed May 20, 2026. License: CC BY 4.0.
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Places within Illinois 1st Congressional District
counties it covers3
Frequently asked questions
How did Illinois 1st Congressional District vote in 2024?
In 2024, Illinois 1st Congressional District voted Democratic by 31.6 points (D+31.6), carried by the Democratic candidate. Out of 330,047 votes cast, 213,642 went Democratic and 109,364 went Republican.
When did Illinois 1st Congressional District last vote Republican?
The most recent presidential election in which Illinois 1st Congressional District voted Republican was 1924.
How many people live in Illinois 1st Congressional District?
Illinois 1st Congressional District has a population of 753,624 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Illinois 1st Congressional District?
Median household income in Illinois 1st Congressional District is $71,465 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Illinois 1st Congressional District?
Akashic tracks 38 presidential elections in Illinois 1st Congressional District from 1876 to 2024. Of those, 35 went Democratic and 3 went Republican.