- Lead
- 13,228
- Total
- 80,068
- vs nation
- D+18.0
Illinois 25th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 21,600
- Total
- 86,425
- vs nation
- D+20.5
- Lead
- 18,124
- Total
- 77,143
- vs nation
- D+21.4
- Lead
- 9,450
- Total
- 70,391
- vs nation
- D+9.6
- Lead
- 17,179
- Total
- 74,881
- vs nation
- D+15.7
- Lead
- 1,196
- Total
- 67,507
- vs nation
- D+4.2
- Lead
- 764
- Total
- 59,165
- vs nation
- R+1.8
- Lead
- 737
- Total
- 51,829
- vs nation
- R+7.1
Key facts
- 2024 presidential margin
- D+16.5MIT Election Lab
- Population
- 217,4132024 5-year
- Population density
- 2,205 / sq mi2024 5-year · TIGER/Line
- Land area
- 98.6 sq miTIGER/Line
- Median household income
- $98,2132024 5-year
- White (non-Hispanic)
- 41.9%2024 5-year
- Black
- 6.1%2024 5-year
- Hispanic / Latino
- 40.1%2024 5-year
- Peak Democratic margin
- D+25.0 in 2020MIT Election Lab
- Peak Republican margin
- R+65.4 in 1920MIT Election Lab
- Most similar
- State Senate District 22, IL · twin score 92.7
presidential history
Party record book
Illinois 25th 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
Joe Biden2020
61.3%
52,986 votes · D+25.0 · modeled estimate
Runner-up · Barack Obama, 2008 · 60.9%
Republican
Warren G. Harding1920
80.6%
9,113 votes · R+65.4 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 73.3%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
52,986votes
61.3% of the vote · D+25.0 · modeled estimate
Runner-up · Kamala Harris, 2024 · 45,752 votes
Republican
Ronald Reagan1984
34,448votes
68.3% of the vote · R+37.2 · modeled estimate
Runner-up · George W. Bush, 2004 · 32,894 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
+21.4pts D vs U.S.
Place D+23.5 · U.S. D+2.1 · modeled estimate
Runner-up · Joe Biden, 2020 · +20.5 pts
Republican
Warren G. Harding1920
+39.2pts R vs U.S.
Place R+65.4 · U.S. R+26.2 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · +37.1 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 |
|---|---|---|---|---|
| 2020 | D | 61.3%53,703 | 38.7%33,867 | 87,570 |
Illinois 25th State Senate District sits in the Upper Midwest. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 25.0 points in 2020 and a Republican high of 65.4 points in 1920. Between 2020 and 2024 the district moved 8.5 points toward the Republican candidate; the 2024 margin was 16.5 points.
A population of 217,413, a 42% non-Hispanic-white share, and a median household income of $98,213 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 22 and State Senate District 31.
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 25th State Senate District. Akashic. https://akashic.app/sld-upper/17025/. Accessed May 20, 2026. License: CC BY 4.0.