- Lead
- 8,434
- Total
- 81,875
- vs nation
- D+11.8
Illinois 34th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 11,024
- Total
- 87,605
- vs nation
- D+8.1
- Lead
- 8,590
- Total
- 83,475
- vs nation
- D+8.2
- Lead
- 13,963
- Total
- 83,227
- vs nation
- D+12.9
- Lead
- 21,324
- Total
- 89,158
- vs nation
- D+16.6
- Lead
- 8,800
- Total
- 82,908
- vs nation
- D+13.1
- Lead
- 7,031
- Total
- 73,327
- vs nation
- D+9.1
- Lead
- 8,395
- Total
- 67,278
- vs nation
- D+4.0
Key facts
- 2024 presidential margin
- D+10.3MIT Election Lab
- Population
- 216,9082024 5-year
- Population density
- 1,624 / sq mi2024 5-year · TIGER/Line
- Land area
- 134 sq miTIGER/Line
- Median household income
- $58,1752024 5-year
- White (non-Hispanic)
- 55.2%2024 5-year
- Black
- 16.3%2024 5-year
- Hispanic / Latino
- 20.1%2024 5-year
- Peak Democratic margin
- D+23.9 in 2008MIT Election Lab
- Peak Republican margin
- R+60.4 in 1920MIT Election Lab
- Most similar
- State Senate District 2, IN · twin score 78.6
presidential history
Party record book
Illinois 34th 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
60.9%
54,273 votes · D+23.9 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 60.4%
Republican
Warren G. Harding1920
76.4%
12,655 votes · R+60.4 · modeled estimate
Runner-up · Herbert Hoover, 1928 · 76.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
54,273votes
60.9% of the vote · D+23.9 · modeled estimate
Runner-up · Joe Biden, 2020 · 47,990 votes
Republican
Ronald Reagan1984
37,361votes
53.0% of the vote · R+6.5 · modeled estimate
Runner-up · Donald Trump, 2020 · 36,966 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
Barack Obama2008
+16.6pts D vs U.S.
Place D+23.9 · U.S. D+7.3 · modeled estimate
Runner-up · John Kerry, 2004 · +13.1 pts
Republican
Theodore Roosevelt1904
+39.6pts R vs U.S.
Place R+59.2 · U.S. R+19.7 · modeled estimate
Runner-up · William McKinley, 1896 · +38.6 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 | R | 29.5%23,655 | 70.5%56,494 | 80,149 |
| 2020 | R | 44.4%42,761 | 55.6%53,615 | 96,376 |
Illinois 34th State Senate District sits in the Upper Midwest. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 23.9 points in 2008 and a Republican high of 60.4 points in 1920. Between 2020 and 2024 the district moved 2.3 points toward the Republican candidate; the 2024 margin was 10.3 points.
A population of 216,908, a 55% non-Hispanic-white share, and a median household income of $58,175 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 23.
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 34th State Senate District. Akashic. https://akashic.app/sld-upper/17034/. Accessed May 20, 2026. License: CC BY 4.0.