- Lead
- 37,771
- Total
- 85,550
- vs nation
- D+45.6
Illinois 39th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 49,613
- Total
- 94,141
- vs nation
- D+48.2
- Lead
- 48,563
- Total
- 88,504
- vs nation
- D+52.8
- Lead
- 41,420
- Total
- 81,558
- vs nation
- D+46.9
- Lead
- 47,897
- Total
- 86,252
- vs nation
- D+48.3
- Lead
- 35,161
- Total
- 82,275
- vs nation
- D+45.2
- Lead
- 31,037
- Total
- 74,363
- vs nation
- D+41.2
- Lead
- 28,873
- Total
- 68,871
- vs nation
- D+33.4
Key facts
- 2024 presidential margin
- D+44.2MIT Election Lab
- Population
- 217,1192024 5-year
- Population density
- 4,825 / sq mi2024 5-year · TIGER/Line
- Land area
- 45 sq miTIGER/Line
- Median household income
- $81,8522024 5-year
- White (non-Hispanic)
- 39.9%2024 5-year
- Black
- 16.4%2024 5-year
- Hispanic / Latino
- 37.2%2024 5-year
- Peak Democratic margin
- D+55.5 in 2008MIT Election Lab
- Peak Republican margin
- R+42.9 in 1920MIT Election Lab
- Most similar
- State Senate District 2, IL · twin score 97.1
presidential history
Party record book
Illinois 39th 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
77.5%
66,852 votes · D+55.5 · modeled estimate
Runner-up · Joe Biden, 2020 · 75.5%
Republican
Warren G. Harding1920
68.6%
20,051 votes · R+42.9 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 58.4%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
71,085votes
75.5% of the vote · D+52.7 · modeled estimate
Runner-up · Barack Obama, 2008 · 66,852 votes
Republican
Dwight D. Eisenhower1956
42,684votes
53.2% of the vote · R+6.5 · modeled estimate
Runner-up · Richard Nixon, 1972 · 42,055 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
+52.8pts D vs U.S.
Place D+54.9 · U.S. D+2.1 · modeled estimate
Runner-up · Barack Obama, 2008 · +48.3 pts
Republican
Warren G. Harding1920
+16.7pts R vs U.S.
Place R+42.9 · U.S. R+26.2 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · +10.5 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 | 70.1%60,647 | 29.9%25,822 | 86,469 |
Illinois 39th State Senate District sits in the Upper Midwest. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 55.5 points in 2008 and a Republican high of 42.9 points in 1920. Between 2020 and 2024 the district moved 8.5 points toward the Republican candidate; the 2024 margin was 44.2 points.
A population of 217,119, a 40% non-Hispanic-white share, and a median household income of $81,852 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 2 and State Senate District 20.
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 39th State Senate District. Akashic. https://akashic.app/sld-upper/17039/. Accessed May 20, 2026. License: CC BY 4.0.