HarrisDemocratic38.7%41,651TrumpRepublican59.2%63,719OtherAll other candidates2.1%2,274
R+20.5- Lead
- 22,068
- Total
- 107,644
- vs nation
- R+19.0
modeled Census-place estimatemodeled estimate
Akashicstate senate district
Illinois 37th State Senate District
Office (updates table and map)
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
BidenDemocratic39.8%44,157TrumpRepublican57.8%64,161OtherAll other candidates2.5%2,725
R+18.0- Lead
- 20,004
- Total
- 111,043
- vs nation
- R+22.5
modeled Census-place estimatemodeled estimate
ClintonDemocratic36.7%37,912TrumpRepublican55.6%57,406OtherAll other candidates7.7%8,003
R+18.9- Lead
- 19,494
- Total
- 103,321
- vs nation
- R+21.0
modeled Census-place estimatemodeled estimate
ObamaDemocratic46.1%46,936RomneyRepublican51.5%52,420OtherAll other candidates2.3%2,370
R+5.4- Lead
- 5,484
- Total
- 101,726
- vs nation
- R+9.2
modeled Census-place estimatemodeled estimate
ObamaDemocratic49.3%52,358McCainRepublican48.7%51,709OtherAll other candidates2.0%2,138
D+0.6- Lead
- 649
- Total
- 106,205
- vs nation
- R+6.7
modeled Census-place estimatemodeled estimate
KerryDemocratic42.6%45,525BushRepublican56.6%60,436OtherAll other candidates0.7%795
R+14.0- Lead
- 14,911
- Total
- 106,756
- vs nation
- R+11.5
modeled Census-place estimatemodeled estimate
GoreDemocratic44.1%42,796BushRepublican53.6%52,033OtherAll other candidates2.3%2,210
R+9.5- Lead
- 9,237
- Total
- 97,039
- vs nation
- R+10.0
modeled Census-place estimatemodeled estimate
ClintonDemocratic44.0%40,356DoleRepublican45.1%41,397OtherAll other candidates10.9%10,032
R+1.1- Lead
- 1,041
- Total
- 91,785
- vs nation
- R+9.7
modeled Census-place estimatemodeled estimate
Key facts
- 2024 presidential margin
- R+20.5MIT Election Lab
- Population
- 217,0292024 5-year
- Population density
- 61 / sq mi2024 5-year · TIGER/Line
- Land area
- 3,561 sq miTIGER/Line
- Median household income
- $76,3632024 5-year
- White (non-Hispanic)
- 82.9%2024 5-year
- Black
- 2.1%2024 5-year
- Hispanic / Latino
- 9.0%2024 5-year
- Peak Democratic margin
- D+7.4 in 1912MIT Election Lab
- Peak Republican margin
- R+62.2 in 1920MIT Election Lab
- Most similar
- State Senate District 45, IL · twin score 91.2
presidential history
Party record book
Illinois 37th 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
49.3%
52,358 votes · D+0.6 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 47.4%
Republican
Warren G. Harding1920
78.3%
47,089 votes · R+62.2 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1956 · 72.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
52,358votes
49.3% of the vote · D+0.6 · modeled estimate
Runner-up · Barack Obama, 2012 · 46,936 votes
Republican
Dwight D. Eisenhower1956
73,635votes
72.9% of the vote · R+45.9 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 73,549 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
−6.7pts D vs U.S.
Place D+0.6 · U.S. D+7.3 · modeled estimate
Runner-up · Bill Clinton, 1992 · −7.7 pts
Republican
Thomas E. Dewey1944
+41.1pts R vs U.S.
Place R+33.6 · U.S. D+7.5 · modeled estimate
Runner-up · Thomas E. Dewey, 1948 · +38.2 pts
current representation
Current officeholders
RLi ArellanoState Senate · 37
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 | 27.9%26,163 | 72.1%67,489 | 93,652 |
| 2020 | R | 40.5%42,902 | 59.5%63,112 | 106,014 |
With a 2024 presidential margin of just 2 points, Illinois Senate District 37 sits at the competitive edge of a state that leans reliably Democratic statewide, making its roughly 217,000 residents an outsized factor in legislative balance.
Across the recorded series it reached a Democratic high of 7.4 points in 1912 and a Republican high of 62.2 points in 1920. Between 2020 and 2024 the district moved 2.5 points toward the Republican candidate; the 2024 margin was 20.5 points.
A population of 217,029, a 83% non-Hispanic-white share, and a median household income of $76,363 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 45 and State Senate District 27.
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 45
Illinois
91.2twin score
12-yr trendcollege share2020–2024 trajectory
State Senate District 27
Pennsylvania
89.4twin score
12-yr trendcollege share% White≠ Polish ancestry
State Senate District 57
New York
87.7twin score
12-yr trendcollege share2020 margin≠ Polish 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.
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Illinois 37th State Senate District. Akashic. https://akashic.app/sld-upper/17037/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Places within Illinois 37th State Senate District
Frequently asked questions
How did Illinois 37th State Senate District vote in 2024?
In 2024, Illinois 37th State Senate District voted Republican by 20.5 points (R+20.5), carried by the Republican candidate. Out of 107,644 votes cast, 41,651 went Democratic and 63,719 went Republican.
When did Illinois 37th State Senate District last vote Democratic?
The most recent presidential election in which Illinois 37th State Senate District voted Democratic was 2008.
How many people live in Illinois 37th State Senate District?
Illinois 37th State Senate District has a population of 217,029 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Illinois 37th State Senate District?
Median household income in Illinois 37th State Senate District is $76,363 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Illinois 37th State Senate District?
Akashic tracks 38 presidential elections in Illinois 37th State Senate District from 1876 to 2024. Of those, 1 went Democratic and 36 went Republican.