- Lead
- 7,337
- Total
- 57,165
- vs nation
- D+14.3
Illinois 45th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 10,101
- Total
- 60,761
- vs nation
- D+12.2
- Lead
- 6,214
- Total
- 53,133
- vs nation
- D+9.6
- Lead
- 849
- Total
- 49,586
- vs nation
- R+5.6
- Lead
- 4,042
- Total
- 51,534
- vs nation
- D+0.6
- Lead
- 6,157
- Total
- 49,960
- vs nation
- R+9.9
- Lead
- 7,188
- Total
- 45,138
- vs nation
- R+16.4
- Lead
- 5,367
- Total
- 40,547
- vs nation
- R+21.8
Key facts
- 2024 presidential margin
- D+12.8MIT Election Lab
- Population
- 108,5852024 5-year
- Population density
- 3,744 / sq mi2024 5-year · TIGER/Line
- Land area
- 29 sq miTIGER/Line
- Median household income
- $126,1732024 5-year
- White (non-Hispanic)
- 71.4%2024 5-year
- Black
- 2.9%2024 5-year
- Hispanic / Latino
- 11.1%2024 5-year
- Peak Democratic margin
- D+16.6 in 2020MIT Election Lab
- Peak Republican margin
- R+72.0 in 1920MIT Election Lab
- Most similar
- State House District 47, IL · twin score 98.6
presidential history
Party record book
Illinois 45th State House 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
Joe Biden2020
56.9%
34,596 votes · D+16.6 · modeled estimate
Runner-up · Kamala Harris, 2024 · 54.9%
Republican
Warren G. Harding1920
83.3%
2,326 votes · R+72.0 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1956 · 80.3%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
34,596votes
56.9% of the vote · D+16.6 · modeled estimate
Runner-up · Kamala Harris, 2024 · 31,377 votes
Republican
Ronald Reagan1984
29,432votes
76.5% of the vote · R+53.5 · modeled estimate
Runner-up · George H. W. Bush, 1988 · 28,058 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
Kamala Harris2024
+14.3pts D vs U.S.
Place D+12.8 · U.S. R+1.5 · modeled estimate
Runner-up · Joe Biden, 2020 · +12.2 pts
Republican
Thomas E. Dewey1948
+51.7pts R vs U.S.
Place R+47.2 · U.S. D+4.5 · modeled estimate
Runner-up · Wendell Willkie, 1940 · +47.4 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 | 56.6%29,617 | 43.4%22,689 | 52,306 |
| 2020 | D | 64.5%31,412 | 35.5%17,324 | 48,736 |
Illinois 45th State House District sits in the Upper Midwest. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 16.6 points in 2020 and a Republican high of 72.0 points in 1920. Between 2020 and 2024 the district moved 3.8 points toward the Republican candidate; the 2024 margin was 12.8 points.
A population of 108,585, a 71% non-Hispanic-white share, and a median household income of $126,173 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 47 and State House District 81.
The state-house 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 45th State House District. Akashic. https://akashic.app/sld-lower/17045/. Accessed May 20, 2026. License: CC BY 4.0.