- Lead
- 16,838
- Total
- 44,831
- vs nation
- D+39.0
Illinois 12th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 34,605
- Total
- 54,270
- vs nation
- D+59.3
- Lead
- 36,683
- Total
- 51,107
- vs nation
- D+69.7
- Lead
- 33,043
- Total
- 46,091
- vs nation
- D+67.8
- Lead
- 36,844
- Total
- 49,501
- vs nation
- D+67.2
- Lead
- 30,365
- Total
- 45,742
- vs nation
- D+68.8
- Lead
- 27,062
- Total
- 41,512
- vs nation
- D+64.7
- Lead
- 24,550
- Total
- 39,019
- vs nation
- D+54.4
Key facts
- 2024 presidential margin
- D+37.6MIT Election Lab
- Population
- 217,1152024 5-year
- Population density
- 15,077 / sq mi2024 5-year · TIGER/Line
- Land area
- 14.4 sq miTIGER/Line
- Median household income
- $65,2892024 5-year
- White (non-Hispanic)
- 10.3%2024 5-year
- Black
- 4.9%2024 5-year
- Hispanic / Latino
- 69.0%2024 5-year
- Peak Democratic margin
- D+74.4 in 2008MIT Election Lab
- Peak Republican margin
- R+18.4 in 1920MIT Election Lab
- Most similar
- State Senate District 1, IL · twin score 96.1
presidential history
Party record book
Illinois 12th 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
86.7%
42,919 votes · D+74.4 · modeled estimate
Runner-up · Barack Obama, 2012 · 85.1%
Republican
Warren G. Harding1920
53.5%
7,926 votes · R+18.4 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 45.4%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
43,827votes
80.8% of the vote · D+63.8 · modeled estimate
Runner-up · Barack Obama, 2008 · 42,919 votes
Republican
Dwight D. Eisenhower1956
16,748votes
39.4% of the vote · D+21.3 · modeled estimate
Runner-up · Richard Nixon, 1972 · 15,777 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
+69.7pts D vs U.S.
Place D+71.8 · U.S. D+2.1 · modeled estimate
Runner-up · John Kerry, 2004 · +68.8 pts
Republican
William H. Taft1912
−6.8pts R vs U.S.
Place D+26.4 · U.S. D+19.5 · a third-party candidate carried the Place · modeled estimate
Runner-up · Warren G. Harding, 1920 · −7.8 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Illinois 12th State Senate District sits in the Upper Midwest. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 74.4 points in 2008 and a Republican high of 18.4 points in 1920. Between 2020 and 2024 the district moved 26.2 points toward the Republican candidate; the 2024 margin was 37.6 points.
A population of 217,115, a 10% non-Hispanic-white share, and a median household income of $65,289 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 13.
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 12th State Senate District. Akashic. https://akashic.app/sld-upper/17012/. Accessed May 20, 2026. License: CC BY 4.0.