- Lead
- 23,641
- Total
- 70,589
- vs nation
- D+35.0
Illinois 30th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 31,331
- Total
- 78,953
- vs nation
- D+35.2
- Lead
- 29,505
- Total
- 73,699
- vs nation
- D+37.9
- Lead
- 21,051
- Total
- 68,259
- vs nation
- D+27.0
- Lead
- 29,788
- Total
- 73,113
- vs nation
- D+33.5
- Lead
- 13,722
- Total
- 64,303
- vs nation
- D+23.8
- Lead
- 11,557
- Total
- 56,098
- vs nation
- D+20.1
- Lead
- 10,107
- Total
- 47,899
- vs nation
- D+12.6
Key facts
- 2024 presidential margin
- D+33.5MIT Election Lab
- Population
- 217,2542024 5-year
- Population density
- 3,034 / sq mi2024 5-year · TIGER/Line
- Land area
- 71.6 sq miTIGER/Line
- Median household income
- $89,6852024 5-year
- White (non-Hispanic)
- 35.3%2024 5-year
- Black
- 10.6%2024 5-year
- Hispanic / Latino
- 37.9%2024 5-year
- Peak Democratic margin
- D+40.7 in 2008MIT Election Lab
- Peak Republican margin
- R+58.2 in 1920MIT Election Lab
- Most similar
- State Senate District 20, IL · twin score 93.0
presidential history
Party record book
Illinois 30th 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
69.9%
51,102 votes · D+40.7 · modeled estimate
Runner-up · Joe Biden, 2020 · 68.7%
Republican
Warren G. Harding1920
76.2%
3,661 votes · R+58.2 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 71.4%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
54,221votes
68.7% of the vote · D+39.7 · modeled estimate
Runner-up · Barack Obama, 2008 · 51,102 votes
Republican
George W. Bush2004
25,118votes
39.1% of the vote · D+21.3 · modeled estimate
Runner-up · Mitt Romney, 2012 · 23,264 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
+37.9pts D vs U.S.
Place D+40.0 · U.S. D+2.1 · modeled estimate
Runner-up · Joe Biden, 2020 · +35.2 pts
Republican
Calvin Coolidge1924
+32.7pts R vs U.S.
Place R+57.9 · U.S. R+25.2 · modeled estimate
Runner-up · Warren G. Harding, 1920 · +32.0 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Illinois 30th State Senate District sits in the Upper Midwest. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 40.7 points in 2008 and a Republican high of 58.2 points in 1920. Between 2020 and 2024 the district moved 6.2 points toward the Republican candidate; the 2024 margin was 33.5 points.
A population of 217,254, a 35% non-Hispanic-white share, and a median household income of $89,685 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 20 and State Senate District 39.
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 30th State Senate District. Akashic. https://akashic.app/sld-upper/17030/. Accessed May 20, 2026. License: CC BY 4.0.