- Lead
- 2,039
- Total
- 101,323
- vs nation
- R+0.5
Illinois 56th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 3,068
- Total
- 106,152
- vs nation
- R+7.3
- Lead
- 6,603
- Total
- 100,754
- vs nation
- R+8.6
- Lead
- 6,711
- Total
- 96,720
- vs nation
- D+3.1
- Lead
- 17,399
- Total
- 102,078
- vs nation
- D+9.8
- Lead
- 10,179
- Total
- 96,835
- vs nation
- D+13.0
- Lead
- 13,865
- Total
- 86,481
- vs nation
- D+15.5
- Lead
- 18,701
- Total
- 79,774
- vs nation
- D+14.9
Key facts
- 2024 presidential margin
- R+2.0MIT Election Lab
- Population
- 217,2442024 5-year
- Population density
- 953 / sq mi2024 5-year · TIGER/Line
- Land area
- 228 sq miTIGER/Line
- Median household income
- $70,1892024 5-year
- White (non-Hispanic)
- 75.0%2024 5-year
- Black
- 12.5%2024 5-year
- Hispanic / Latino
- 5.4%2024 5-year
- Peak Democratic margin
- D+43.2 in 1964MIT Election Lab
- Peak Republican margin
- R+20.6 in 1920MIT Election Lab
- Most similar
- State Senate District 29, OH · twin score 75.3
presidential history
Party record book
Illinois 56th 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
Lyndon B. Johnson1964
71.6%
55,596 votes · D+43.2 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 66.6%
Republican
Warren G. Harding1920
53.6%
14,679 votes · R+20.6 · modeled estimate
Runner-up · Theodore Roosevelt, 1904 · 53.4%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
58,741votes
57.5% of the vote · D+17.0 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 55,596 votes
Republican
Donald Trump2020
53,106votes
50.0% of the vote · R+2.9 · modeled estimate
Runner-up · Donald Trump, 2024 · 50,583 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
Adlai Stevenson1952
+33.5pts D vs U.S.
Place D+22.8 · U.S. R+10.8 · modeled estimate
Runner-up · Adlai Stevenson, 1956 · +31.4 pts
Republican
Donald Trump2016
+8.6pts R vs U.S.
Place R+6.6 · U.S. D+2.1 · modeled estimate
Runner-up · Donald Trump, 2020 · +7.3 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 | 37.8%37,964 | 62.2%62,357 | 100,321 |
| 2020 | R | 42.9%47,390 | 57.1%63,020 | 110,410 |
In 2024 it voted Republican by R+2.0, against D+17.0 in 2008, having changed party at least once across the five cycles. About 88,000 residents lived here, with White alone at 79.5% in the 2024 ACS 5-year.
Across the recorded series it reached a Democratic high of 43.2 points in 1964 and a Republican high of 20.6 points in 1920. Between 2020 and 2024 the district moved 0.9 points toward the Democratic candidate; the 2024 margin was 2.0 points.
A population of 217,244, a 75% non-Hispanic-white share, and a median household income of $70,189 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 29 and State Senate District 48.
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 56th State Senate District. Akashic. https://akashic.app/sld-upper/17056/. Accessed May 20, 2026. License: CC BY 4.0.