HarrisDemocratic56.4%19,916TrumpRepublican41.9%14,785OtherAll other candidates1.7%602
D+14.5- Lead
- 5,131
- Total
- 35,303
- vs nation
- D+16.0
- Turnout
- —
Akashiccity
Janesville, WI
Office (updates table and map)
President margin by year
Place winner margin
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
President results by year
Vote totals, margins, and source status
BidenDemocratic58.0%19,589TrumpRepublican40.0%13,523OtherAll other candidates2.0%662
D+18.0- Lead
- 6,066
- Total
- 33,774
- vs nation
- D+13.5
- Turnout
- —
ClintonDemocratic53.8%16,182TrumpRepublican38.9%11,705OtherAll other candidates7.3%2,194
D+14.9- Lead
- 4,477
- Total
- 30,081
- vs nation
- D+12.8
- Turnout
- —
ObamaDemocratic61.9%20,000RomneyRepublican36.9%11,933OtherAll other candidates1.2%382
D+25.0- Lead
- 8,067
- Total
- 32,315
- vs nation
- D+21.1
- Turnout
- —
ObamaDemocratic65.9%21,384McCainRepublican32.7%10,617OtherAll other candidates1.4%464
D+33.2- Lead
- 10,767
- Total
- 32,465
- vs nation
- D+25.9
- Turnout
- —
KerryDemocratic59.6%19,692BushRepublican39.1%12,924OtherAll other candidates1.3%433
D+20.5- Lead
- 6,768
- Total
- 33,049
- vs nation
- D+22.9
- Turnout
- —
Key facts
- 2024 presidential margin
- D+14.5MIT Election Lab
- Population
- 66,0302024 5-year
- Median household income
- $73,4462024 5-year
- White (non-Hispanic)
- 85.3%2024 5-year
- Black
- 3.2%2024 5-year
- Hispanic / Latino
- 6.2%2024 5-year
- Peak Democratic margin
- D+33.2 in 2008MIT Election Lab
- Most similar
- Dubuque, IA · twin score 89.0
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 2004 | +20.5% |
| 2008 | +33.2% |
| 2012 | +25.0% |
| 2016 | +14.9% |
| 2020 | +18.0% |
| 2024 | +14.5% |
DemocraticRepublican
6 presidential elections
| Year | Won | Democratic | Republican | Other | Margin | Swing | vs U.S. | Total |
|---|---|---|---|---|---|---|---|---|
| D | 56.4%Harris19,916 | 41.9%Trump14,785 | 1.7% | D+14.5 | R+3.4 | D+16.0 | 35,303 | |
| D | 58.0%Biden19,589 | 40.0%Trump13,523 | 2.0% | D+18.0 | D+3.1 | D+13.5 | 33,774 | |
| D | 53.8%Clinton16,182 | 38.9%Trump11,705 | 7.3% | D+14.9 | R+10.1 | D+12.8 | 30,081 | |
| D | 61.9%Obama20,000 | 36.9%Romney11,933 | 1.2% | D+25.0 | R+8.2 | D+21.1 | 32,315 | |
| D | 65.9%Obama21,384 | 32.7%McCain10,617 | 1.4% | D+33.2 | — | D+25.9 | 32,465 | |
| D | 59.6%Kerry19,692 | 39.1%Bush12,924 | 1.3% | D+20.5 | — | D+22.9 | 33,049 |
Federal and statewide elections · 2 House · 1 Senate
U.S. House
Each row shows U.S. House votes counted inside this Place. “Vote lead” is the local lead here, not necessarily the winner of the full contest.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2024 | D | 53.4%18,048 | 46.6%15,742 | 33,790 |
| 2020 | D | 54.1%17,722 | 45.9%15,053 | 32,775 |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2024 | D | 57.1%19,995 | 40.3%14,134 | 35,043 |
Janesville lost its General Motors assembly plant in 2008 after a century of auto manufacturing, a closure that reshaped its economy and made it a closely watched bellwether for working-class voter realignment in southwestern Wisconsin.
Across the recorded series it reached a Democratic high of 33.2 points in 2008. Between 2020 and 2024 the city moved 3.4 points toward the Republican candidate; the 2024 margin was 14.5 points.
A population of 66,030, a 85% non-Hispanic-white share, and a median household income of $73,446 describe the city. The city's voting pattern over the last decade is most similar to that of Dubuque and Cedar Rapids.
Political twins — cities
The cities whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Dubuque
Iowa
89.0twin score
population scale2008–2012 trajectoryelasticity≠ Polish ancestry
Cedar Rapids
Iowa
88.5twin score
population scale2008–2024 trajectory≠ Polish ancestry
Waterloo
Iowa
87.8twin score
population scale2008–2012 trajectoryelasticity≠ 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.
Browse places by community — income, education, race & ethnicity, language — all community cuts →
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Janesville, Wisconsin. Akashic. https://akashic.app/city/5537825/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Wisconsin at the ballot boxAll elections →
Frequently asked questions
How did Janesville, Wisconsin vote in 2024?
In 2024, Janesville, Wisconsin voted Democratic by 14.5 points (D+14.5), carried by the Democratic candidate. Out of 35,303 votes cast, 19,916 went Democratic and 14,785 went Republican.
How many people live in Janesville, Wisconsin?
Janesville, Wisconsin has a population of 66,030 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Janesville, Wisconsin?
Median household income in Janesville, Wisconsin is $73,446 — below the national median of $80,734. The Wisconsin state median is $77,485.
What is the political history of Janesville, Wisconsin?
Akashic tracks 6 presidential elections in Janesville, Wisconsin from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.