- Lead
- 11,165
- Total
- 87,241
- vs nation
- D+14.3
Illinois 43rd State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 20,052
- Total
- 94,865
- vs nation
- D+16.7
- Lead
- 18,619
- Total
- 87,283
- vs nation
- D+19.2
- Lead
- 16,361
- Total
- 79,796
- vs nation
- D+16.6
- Lead
- 23,251
- Total
- 83,306
- vs nation
- D+20.6
- Lead
- 7,112
- Total
- 70,859
- vs nation
- D+12.5
- Lead
- 6,700
- Total
- 54,818
- vs nation
- D+11.7
- Lead
- 7,727
- Total
- 43,637
- vs nation
- D+9.2
Key facts
- 2024 presidential margin
- D+12.8MIT Election Lab
- Population
- 216,9562024 5-year
- Population density
- 1,078 / sq mi2024 5-year · TIGER/Line
- Land area
- 201 sq miTIGER/Line
- Median household income
- $86,1942024 5-year
- White (non-Hispanic)
- 46.6%2024 5-year
- Black
- 15.2%2024 5-year
- Hispanic / Latino
- 30.8%2024 5-year
- Peak Democratic margin
- D+27.9 in 2008MIT Election Lab
- Peak Republican margin
- R+47.1 in 1920MIT Election Lab
- Most similar
- State Senate District 22, IL · twin score 90.6
presidential history
Party record book
Illinois 43rd 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
63.3%
52,741 votes · D+27.9 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 63.0%
Republican
Warren G. Harding1920
71.0%
4,997 votes · R+47.1 · modeled estimate
Runner-up · Theodore Roosevelt, 1904 · 59.7%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
56,369votes
59.4% of the vote · D+21.1 · modeled estimate
Runner-up · Barack Obama, 2008 · 52,741 votes
Republican
Donald Trump2024
37,072votes
42.5% of the vote · D+12.8 · modeled estimate
Runner-up · Donald Trump, 2020 · 36,317 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
Al Smith1928
+21.4pts D vs U.S.
Place D+3.9 · U.S. R+17.5 · modeled estimate
Runner-up · Barack Obama, 2008 · +20.6 pts
Republican
Warren G. Harding1920
+20.9pts R vs U.S.
Place R+47.1 · U.S. R+26.2 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · +17.8 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.
The district recorded a Democratic presidential margin of D+12.8 in 2024, compared with D+27.9 in 2008. Median household income was $110,052 in the 2024 ACS 5-year, among the higher figures for a state senate district.
Across the recorded series it reached a Democratic high of 27.9 points in 2008 and a Republican high of 47.1 points in 1920. Between 2020 and 2024 the district moved 8.3 points toward the Republican candidate; the 2024 margin was 12.8 points.
A population of 216,956, a 47% non-Hispanic-white share, and a median household income of $86,194 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 22 and State Senate District 11.
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 43rd State Senate District. Akashic. https://akashic.app/sld-upper/17043/. Accessed May 20, 2026. License: CC BY 4.0.