HarrisDemocratic38.1%42,600TrumpRepublican60.4%67,495OtherAll other candidates1.5%1,717
R+22.3- Lead
- 24,895
- Total
- 111,812
- vs nation
- R+20.8
modeled Census-place estimatemodeled estimate
Akashicstate senate district
Illinois 45th State Senate District
Contests in this Place (44 available)
President38 · 1876–2024 · 3 mapped
▦ precinct · ▥ counties · ▢ no spatial detail
President margin by year
Place winner margin
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
The precinct map shows the 2024 presidential vote; the timeline scrubs the district’s overall result across 1892–2024, on its current boundaries.
President results by year
Modeled candidate-vote estimate on current district boundaries
BidenDemocratic38.7%44,839TrumpRepublican58.7%67,975OtherAll other candidates2.6%3,011
R+20.0- Lead
- 23,136
- Total
- 115,825
- vs nation
- R+24.4
modeled Census-place estimatemodeled estimate
ClintonDemocratic35.8%37,519TrumpRepublican56.8%59,545OtherAll other candidates7.5%7,819
R+21.0- Lead
- 22,026
- Total
- 104,883
- vs nation
- R+23.1
modeled Census-place estimatemodeled estimate
ObamaDemocratic43.3%44,944RomneyRepublican54.5%56,494OtherAll other candidates2.2%2,297
R+11.1- Lead
- 11,550
- Total
- 103,735
- vs nation
- R+15.0
modeled Census-place estimatemodeled estimate
ObamaDemocratic47.3%51,050McCainRepublican50.6%54,579OtherAll other candidates2.1%2,231
R+3.3- Lead
- 3,529
- Total
- 107,860
- vs nation
- R+10.5
modeled Census-place estimatemodeled estimate
KerryDemocratic39.5%42,127BushRepublican59.7%63,730OtherAll other candidates0.8%849
R+20.2- Lead
- 21,603
- Total
- 106,706
- vs nation
- R+17.8
modeled Census-place estimatemodeled estimate
GoreDemocratic39.0%36,621BushRepublican58.4%54,850OtherAll other candidates2.6%2,396
R+19.4- Lead
- 18,229
- Total
- 93,867
- vs nation
- R+19.9
modeled Census-place estimatemodeled estimate
ClintonDemocratic38.0%32,684DoleRepublican51.0%43,878OtherAll other candidates11.0%9,440
R+13.0- Lead
- 11,194
- Total
- 86,002
- vs nation
- R+21.5
modeled Census-place estimatemodeled estimate
Key facts
- 2024 presidential margin
- R+22.3MIT Election Lab
- Population
- 217,0912024 5-year
- Population density
- 76 / sq mi2024 5-year · TIGER/Line
- Land area
- 2,863 sq miTIGER/Line
- Median household income
- $78,4092024 5-year
- White (non-Hispanic)
- 84.8%2024 5-year
- Black
- 3.7%2024 5-year
- Hispanic / Latino
- 6.1%2024 5-year
- Peak Democratic margin
- D+6.6 in 1912MIT Election Lab
- Peak Republican margin
- R+65.8 in 1920MIT Election Lab
- Most similar
- State Senate District 37, IL · twin score 91.2
presidential history
Party record book
Illinois 45th 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
47.3%
51,050 votes · R+3.3 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 46.2%
Republican
Warren G. Harding1920
81.1%
38,062 votes · R+65.8 · modeled estimate
Runner-up · Herbert Hoover, 1928 · 75.1%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
51,050votes
47.3% of the vote · R+3.3 · modeled estimate
Runner-up · Barack Obama, 2012 · 44,944 votes
Republican
Donald Trump2020
67,975votes
58.7% of the vote · R+20.0 · modeled estimate
Runner-up · Donald Trump, 2024 · 67,495 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
−10.5pts D vs U.S.
Place R+3.3 · U.S. D+7.3 · modeled estimate
Runner-up · Woodrow Wilson, 1912 · −12.9 pts
Republican
Wendell Willkie1940
+39.8pts R vs U.S.
Place R+29.9 · U.S. D+9.9 · modeled estimate
Runner-up · Warren G. Harding, 1920 · +39.6 pts
current representation
Current officeholders
RAndrew ChesneyState Senate · 45
State legislative officeholder from OpenStates nightly current-legislator data.
U.S. House elections · 2 House
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 | 25.6%22,888 | 74.4%66,559 | 89,447 |
| 2020 | R | 42.3%44,152 | 57.7%60,161 | 104,313 |
Illinois 45th State Senate District sits in the Upper Midwest. In 2024 it voted Republican.
Across the recorded series it reached a Democratic high of 6.6 points in 1912 and a Republican high of 65.8 points in 1920. Between 2020 and 2024 the district moved 2.3 points toward the Republican candidate; the 2024 margin was 22.3 points.
A population of 217,091, a 85% non-Hispanic-white share, and a median household income of $78,409 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 37 and State Senate District 35.
Political twins — state-senate districts
The state-senate districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
State Senate District 37
Illinois
91.2twin score
12-yr trendcollege share2020–2024 trajectory
State Senate District 35
Pennsylvania
90.0twin score
12-yr trendmedian age2020 margin
State Senate District 13
Wisconsin
86.7twin score
12-yr trendmedian age2020 margin≠ German ancestry
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.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Illinois 45th State Senate District. Akashic. https://akashic.app/sld-upper/17045/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Places within Illinois 45th State Senate District
Frequently asked questions
How did Illinois 45th State Senate District vote in 2024?
In 2024, Illinois 45th State Senate District voted Republican by 22.3 points (R+22.3), carried by the Republican candidate. Out of 111,812 votes cast, 42,600 went Democratic and 67,495 went Republican.
How many people live in Illinois 45th State Senate District?
Illinois 45th State Senate District has a population of 217,091 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Illinois 45th State Senate District?
Median household income in Illinois 45th State Senate District is $78,409 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Illinois 45th State Senate District?
Akashic tracks 38 presidential elections in Illinois 45th State Senate District from 1876 to 2024. Of those, 0 went Democratic and 37 went Republican.