- Lead
- 12,897
- Total
- 72,132
- vs nation
- D+19.4
Illinois 11th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 28,146
- Total
- 80,002
- vs nation
- D+30.7
- Lead
- 30,061
- Total
- 74,243
- vs nation
- D+38.4
- Lead
- 24,363
- Total
- 69,030
- vs nation
- D+31.4
- Lead
- 28,850
- Total
- 72,338
- vs nation
- D+32.6
- Lead
- 18,074
- Total
- 71,757
- vs nation
- D+27.6
- Lead
- 16,030
- Total
- 64,470
- vs nation
- D+24.3
- Lead
- 15,524
- Total
- 60,134
- vs nation
- D+17.3
Key facts
- 2024 presidential margin
- D+17.9MIT Election Lab
- Population
- 217,2992024 5-year
- Population density
- 6,467 / sq mi2024 5-year · TIGER/Line
- Land area
- 33.6 sq miTIGER/Line
- Median household income
- $78,9112024 5-year
- White (non-Hispanic)
- 31.1%2024 5-year
- Black
- 4.3%2024 5-year
- Hispanic / Latino
- 61.4%2024 5-year
- Peak Democratic margin
- D+40.5 in 2016MIT Election Lab
- Peak Republican margin
- R+61.0 in 1920MIT Election Lab
- Most similar
- State Senate District 1, IL · twin score 98.8
presidential history
Party record book
Illinois 11th 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
69.7%
50,398 votes · D+39.9 · modeled estimate
Runner-up · Hillary Clinton, 2016 · 67.6%
Republican
Warren G. Harding1920
77.7%
28,360 votes · R+61.0 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 68.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
53,439votes
66.8% of the vote · D+35.2 · modeled estimate
Runner-up · Barack Obama, 2008 · 50,398 votes
Republican
Dwight D. Eisenhower1956
57,754votes
65.5% of the vote · R+30.9 · modeled estimate
Runner-up · Richard Nixon, 1972 · 54,667 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
+38.4pts D vs U.S.
Place D+40.5 · U.S. D+2.1 · modeled estimate
Runner-up · Barack Obama, 2008 · +32.6 pts
Republican
Warren G. Harding1920
+34.8pts R vs U.S.
Place R+61.0 · U.S. R+26.2 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · +27.5 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Anchored in the collar counties southwest of Chicago, this district backed the 2024 Republican presidential ticket by 24.3 points, making it a consistent outlier in a state that trends heavily Democratic at the statewide level.
Across the recorded series it reached a Democratic high of 40.5 points in 2016 and a Republican high of 61.0 points in 1920. Between 2020 and 2024 the district moved 17.3 points toward the Republican candidate; the 2024 margin was 17.9 points.
A population of 217,299, a 31% non-Hispanic-white share, and a median household income of $78,911 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 1 and State Senate District 22.
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 11th State Senate District. Akashic. https://akashic.app/sld-upper/17011/. Accessed May 20, 2026. License: CC BY 4.0.