Illinois 1st 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
78.6%
47,270 votes · D+57.5 · modeled estimate
Runner-up · Barack Obama, 2012 · 76.3%
Republican
Warren G. Harding1920
69.9%
16,784 votes · R+45.8 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 58.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
48,765votes
74.4% of the vote · D+50.6 · modeled estimate
Runner-up · Barack Obama, 2008 · 47,270 votes
Republican
Dwight D. Eisenhower1956
34,649votes
54.8% of the vote · R+9.7 · modeled estimate
Runner-up · Richard Nixon, 1972 · 32,676 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
Hillary Clinton2016
+54.0pts D vs U.S.
Place D+56.1 · U.S. D+2.1 · modeled estimate
Runner-up · Barack Obama, 2008 · +50.3 pts
Republican
Warren G. Harding1920
+19.6pts R vs U.S.
Place R+45.8 · U.S. R+26.2 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · +12.2 pts
current representation
Current officeholders
DJavier CervantesState Senate · 1
State legislative officeholder from OpenStates nightly current-legislator data.
Illinois 1st State Senate District sits in the Upper Midwest. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 57.5 points in 2008 and a Republican high of 45.8 points in 1920. Between 2020 and 2024 the district moved 20.9 points toward the Republican candidate; the 2024 margin was 29.7 points.
A population of 217,050, a 18% non-Hispanic-white share, and a median household income of $72,790 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 11 and State Senate District 12.
Akashic
Political twins — state-senate districts
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.
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 1st State Senate District. Akashic. https://akashic.app/sld-upper/17001/. Accessed May 20, 2026. License: CC BY 4.0.
How did Illinois 1st State Senate District vote in 2024?
In 2024, Illinois 1st State Senate District voted Democratic by 29.7 points (D+29.7), carried by the Democratic candidate. Out of 57,673 votes cast, 36,611 went Democratic and 19,458 went Republican.
When did Illinois 1st State Senate District last vote Republican?
The most recent presidential election in which Illinois 1st State Senate District voted Republican was 1972.
How many people live in Illinois 1st State Senate District?
Illinois 1st State Senate District has a population of 217,050 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Illinois 1st State Senate District?
Median household income in Illinois 1st State Senate District is $72,790 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Illinois 1st State Senate District?
Akashic tracks 38 presidential elections in Illinois 1st State Senate District from 1876 to 2024. Of those, 26 went Democratic and 11 went Republican.