- Lead
- 47,596
- Total
- 89,855
- vs nation
- D+54.4
Illinois 4th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 61,981
- Total
- 101,609
- vs nation
- D+56.5
- Lead
- 63,530
- Total
- 100,220
- vs nation
- D+61.3
- Lead
- 55,689
- Total
- 92,088
- vs nation
- D+56.6
- Lead
- 63,183
- Total
- 98,309
- vs nation
- D+57.0
- Lead
- 49,805
- Total
- 92,197
- vs nation
- D+56.5
- Lead
- 43,960
- Total
- 83,431
- vs nation
- D+52.2
- Lead
- 40,333
- Total
- 77,180
- vs nation
- D+43.7
Key facts
- 2024 presidential margin
- D+53.0MIT Election Lab
- Population
- 217,1442024 5-year
- Population density
- 5,220 / sq mi2024 5-year · TIGER/Line
- Land area
- 41.6 sq miTIGER/Line
- Median household income
- $75,2142024 5-year
- White (non-Hispanic)
- 29.1%2024 5-year
- Black
- 44.7%2024 5-year
- Hispanic / Latino
- 21.2%2024 5-year
- Peak Democratic margin
- D+64.3 in 2008MIT Election Lab
- Peak Republican margin
- R+31.3 in 1920MIT Election Lab
- Most similar
- State Senate District 15, IL · twin score 98.0
presidential history
Party record book
Illinois 4th State Senate 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
Barack Obama2008
81.8%
80,463 votes · D+64.3 · modeled estimate
Runner-up · Joe Biden, 2020 · 79.8%
Republican
Warren G. Harding1920
62.7%
18,884 votes · R+31.3 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 53.8%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
81,068votes
79.8% of the vote · D+61.0 · modeled estimate
Runner-up · Barack Obama, 2008 · 80,463 votes
Republican
Dwight D. Eisenhower1956
40,332votes
46.2% of the vote · D+7.6 · modeled estimate
Runner-up · Richard Nixon, 1972 · 39,600 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
Hillary Clinton2016
+61.3pts D vs U.S.
Place D+63.4 · U.S. D+2.1 · modeled estimate
Runner-up · Barack Obama, 2008 · +57.0 pts
Republican
Warren G. Harding1920
+5.1pts R vs U.S.
Place R+31.3 · U.S. R+26.2 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · +0.6 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2024 | D | 72.2%60,829 | 27.8%23,430 | 84,259 |
Illinois 4th State Senate District sits in the Upper Midwest. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 64.3 points in 2008 and a Republican high of 31.3 points in 1920. Between 2020 and 2024 the district moved 8.0 points toward the Republican candidate; the 2024 margin was 53.0 points.
A population of 217,144, a 29% non-Hispanic-white share, and a median household income of $75,214 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 15 and State Senate District 17.
The state-senate 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.
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 →
Illinois 4th State Senate District. Akashic. https://akashic.app/sld-upper/17004/. Accessed May 20, 2026. License: CC BY 4.0.