- Lead
- 46,317
- Total
- 68,119
- vs nation
- D+69.5
Illinois 3rd State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 61,220
- Total
- 80,061
- vs nation
- D+72.0
- Lead
- 65,024
- Total
- 80,195
- vs nation
- D+79.0
- Lead
- 59,091
- Total
- 72,898
- vs nation
- D+77.2
- Lead
- 65,414
- Total
- 78,789
- vs nation
- D+75.8
- Lead
- 55,746
- Total
- 71,546
- vs nation
- D+80.4
- Lead
- 49,460
- Total
- 64,537
- vs nation
- D+76.1
- Lead
- 44,672
- Total
- 59,974
- vs nation
- D+66.0
Key facts
- 2024 presidential margin
- D+68.0MIT Election Lab
- Population
- 217,3542024 5-year
- Population density
- 13,757 / sq mi2024 5-year · TIGER/Line
- Land area
- 15.8 sq miTIGER/Line
- Median household income
- $70,3402024 5-year
- White (non-Hispanic)
- 21.3%2024 5-year
- Black
- 50.1%2024 5-year
- Hispanic / Latino
- 17.6%2024 5-year
- Peak Democratic margin
- D+83.0 in 2008MIT Election Lab
- Most similar
- State Senate District 13, IL · twin score 99.2
presidential history
Party record book
Illinois 3rd 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
91.2%
71,862 votes · D+83.0 · modeled estimate
Runner-up · Barack Obama, 2012 · 90.0%
Republican
Warren G. Harding1920
43.9%
8,219 votes · D+2.6 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 37.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
71,862votes
91.2% of the vote · D+83.0 · modeled estimate
Runner-up · Hillary Clinton, 2016 · 71,062 votes
Republican
Dwight D. Eisenhower1956
17,387votes
28.7% of the vote · D+42.5 · modeled estimate
Runner-up · Richard Nixon, 1972 · 16,605 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
John Kerry2004
+80.4pts D vs U.S.
Place D+77.9 · U.S. R+2.5 · modeled estimate
Runner-up · Hillary Clinton, 2016 · +79.0 pts
Republican
William H. Taft1912
−19.1pts R vs U.S.
Place D+38.6 · U.S. D+19.5 · a third-party candidate carried the Place · modeled estimate
Runner-up · Warren G. Harding, 1920 · −28.8 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Illinois SD-3 backed the 2024 Republican presidential ticket by nearly 20 points, reflecting the strongly conservative tilt common across the state's rural southern and western counties, where agricultural communities dominate the demographic landscape.
Across the recorded series it reached a Democratic high of 83.0 points in 2008. Between 2020 and 2024 the district moved 8.5 points toward the Republican candidate; the 2024 margin was 68.0 points.
A population of 217,354, a 21% non-Hispanic-white share, and a median household income of $70,340 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 13 and State Senate District 5.
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 3rd State Senate District. Akashic. https://akashic.app/sld-upper/17003/. Accessed May 20, 2026. License: CC BY 4.0.