† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
1 counties by 2024 margin · County returns · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupJanesville-Beloit, WIWisconsinUnited States
German31.6%35.8%12.5%
Irish13.0%10.4%9.4%
English9.9%6.7%9.5%
Norwegian9.9%6.1%—
American5.5%3.4%5.3%
Polish3.3%7.6%2.2%
Italian2.9%2.7%4.8%
French1.8%2.2%1.6%
Mexican8.3%5.4%11.3%
Puerto Rican0.5%1.1%1.8%
Dominican0.3%—0.7%
Colombian0.2%—0.4%
African American†4.2%5.3%9.9%
African0.3%0.2%0.5%
Chinese0.2%0.4%1.3%
Cambodian0.2%——
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
Janesville-Beloit, WI
Wisconsin
United States
Median age
40.3
40.5
39.1
Age 18–24
8.4%
9.3%
9.2%
Age 65 and older
17.8%
18.5%
17.2%
Household economy
Measure
Janesville-Beloit, WI
Wisconsin
United States
Median household income
$75,673
$77,485
$84,427
Poverty rate
9.3%
10.6%
12.5%
Bachelor's degree or higher (25+)
25.8%
33.5%
35.6%
Languages at home
Measure
Janesville-Beloit, WI
Wisconsin
United States
Speaks a non-English language at home
8.8%
9.1%
22.3%
Spanish
7.2%
5.0%
13.6%
Religious landscape
Measure
Janesville-Beloit, WI
Wisconsin
United States
Catholic
11.3%
21.0%
18.6%
Evangelical Protestant
12.7%
14.5%
16.5%
Unclaimed / not counted
61.8%
52.0%
51.5%
Mainline Protestant
10.5%
8.4%
5.2%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Janesville-Beloit, WI
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
1892
−16.6%
1896
−37.7%
1900
−43.7%
1904
−50.5%
1908
−39.3%
1912
−12.6%
1916
−26.1%
1920
−70.9%
1924
−54.9%
1928
−42.0%
1932
−14.0%
1936
+9.8%
1940
−6.9%
1944
−4.8%
1948
−2.7%
1952
−29.4%
1956
−35.2%
1960
−21.4%
1964
+16.2%
1968
−9.4%
1972
−17.8%
1976
−0.5%
1980
−10.2%
1984
−10.2%
1988
+2.4%
1992
+13.3%
1996
+20.5%
2000
+18.5%
2004
+16.7%
2008
+29.3%
2012
+23.2%
2016
+10.3%
2020
+11.2%
2024
+7.3%
DemocraticRepublican
34 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
52.8%Harris46,642
45.5%Trump40,218
0.6%Kennedy497 +7
D+7.3
R+3.9
D+8.7
88,310
All 10 candidates in 2024 · 8 minor / independent
Kamala D HarrisDemocratic52.8%46,642
Donald J TrumpRepublican45.5%40,218
Robert F KennedyNonpartisan0.6%497
Jill SteinIndependent0.4%315
Chase OliverLibertarian0.3%247
OtherAll other candidates0.2%181
Randall TerryIndependent0.1%99
Claudia De La CruzNonpartisan0.1%48
Cornel WestNonpartisan0.1%47
Peter Sonski Lauren OnakNonpartisan0.0%16
D
54.7%Biden46,658
43.5%Trump37,138
1.8%
D+11.2
D+0.8
D+6.7
85,360
D
51.7%Clinton39,339
41.4%Trump31,493
6.9%
D+10.3
R+12.9
D+8.2
76,074
D
61.0%Obama49,219
37.8%Romney30,517
1.2%
D+23.2
R+6.1
D+19.3
80,690
D
63.8%Obama50,529
34.6%McCain27,364
1.6%
D+29.3
D+12.6
D+22.0
79,169
D
57.9%Kerry46,598
41.2%Bush33,151
0.9%
D+16.7
R+1.8
D+19.2
80,479
D
57.5%Gore40,472
39.0%Bush27,467
3.5%
D+18.5
R+2.0
D+18.0
70,404
D
53.8%Clinton32,450
33.3%Dole20,096
12.9%
D+20.5
D+7.1
D+12.0
60,320
D
45.1%Clinton31,154
31.8%Bush21,942
23.1%
D+13.3
D+10.9
D+7.8
69,025
D
50.8%Dukakis29,576
48.4%Bush28,178
0.7%
D+2.4
D+12.6
D+10.1
58,188
R
44.5%Mondale26,433
54.8%Reagan32,491
0.7%
R+10.2
±0.0
D+8.0
59,334
R
40.4%Carter24,740
50.6%Reagan30,960
9.0%
R+10.2
R+9.7
R+0.4
61,182
R
48.6%Carter28,048
49.0%Ford28,325
2.4%
R+0.5
D+17.3
R+2.5
57,762
R
40.2%McGovern21,033
58.0%Nixon30,361
1.8%
R+17.8
R+8.4
D+5.3
52,319
R
41.6%Humphrey20,567
51.0%Nixon25,229
7.5%
R+9.4
R+25.6
R+8.7
49,493
D
58.0%Johnson28,257
41.8%Goldwater20,372
0.1%
D+16.2
D+37.6
R+6.4
48,684
R
39.2%Kennedy19,194
60.6%Nixon29,675
0.2%
R+21.4
D+13.8
R+21.6
48,945
R
32.2%Stevenson13,834
67.4%Eisenhower28,980
0.4%
R+35.2
R+5.9
R+19.8
42,987
R
35.3%Stevenson15,183
64.6%Eisenhower27,837
0.1%
R+29.4
R+26.7
R+18.6
43,065
R
47.9%Truman16,150
50.7%Dewey17,068
1.4%
R+2.7
D+2.1
R+7.2
33,692
R
47.4%Roosevelt16,766
52.2%Dewey18,477
0.4%
R+4.8
D+2.0
R+12.3
35,376
R
46.3%Roosevelt17,543
53.1%Willkie20,141
0.6%
R+6.9
R+16.6
R+16.8
37,898
D
53.3%Roosevelt17,991
43.6%Landon14,693
3.1%
D+9.8
D+23.8
R+14.5
33,729
R
42.0%Roosevelt12,612
56.1%Hoover16,825
1.9%
R+14.0
D+28.0
R+31.8
30,008
R
28.7%Smith8,726
70.8%Hoover21,497
0.5%
R+42.0
D+12.9
R+24.6
30,384
R
6.0%Davis1,453
60.9%Coolidge14,815
33.1%
R+54.9
D+15.9
R+29.8
24,320
R
12.7%Cox2,447
83.5%Harding16,152
3.8%
R+70.9
R+44.8
R+44.7
19,337
R
35.0%Wilson4,015
61.1%Hughes7,011
3.9%
R+26.1
R+13.5
R+29.2
11,477
R
30.6%Wilson3,032
43.2%Taft4,276
26.1%
R+12.6
D+26.7
R+32.1
9,895
R
27.5%Bryan3,227
66.8%Taft7,839
5.7%
R+39.3
D+11.2
R+29.8
11,734
R
21.1%Parker2,348
71.6%Roosevelt7,972
7.3%
R+50.5
R+6.8
R+30.9
11,127
R
26.2%Bryan3,094
70.0%McKinley8,249
3.8%
R+43.7
R+6.0
R+36.2
11,790
R
29.8%Bryan3,655
67.5%McKinley8,282
2.8%
R+37.7
R+21.1
R+31.6
12,277
R
38.6%Cleveland4,231
55.2%Harrison6,052
6.1%
R+16.6
—
R+18.3
10,956
Congressional elections · 3 Senate races
U.S. Senate
Source · MIT Election Lab (MEDSL), Senate. CC-BY 4.0.
Year
Won
Democratic
Republican
Total
2024
D
53.8%47,080
43.6%38,097
87,434
2022
D
55.5%36,024
44.3%28,758
64,942
2018
D
62.7%42,616
37.2%25,322
68,011
domestic migration
Who moves in and out
Net domestic migration over time
+764 net domestic migration · 2025
20112025
Net +741 over 2011–2025 · gain loss
Domestic migration in Janesville-Beloit, WI in Janesville-Beloit, WI: net domestic migration by year
Year
Net domestic migration
2011
−905
2012
−314
2013
−79
2014
+12
2015
−508
2016
−182
2017
+397
2018
+257
2019
+42
2021
+261
2022
−125
2023
+374
2024
+747
2025
+764
Janesville's GM plant closure in 2008 marked a turning point for Rock County, which had voted reliably Democratic for decades; the metro now swings between parties in statewide races by single-digit margins.
Across the recorded series it reached a Democratic high of 29.3 points in 2008 and a Republican high of 70.9 points in 1920. Between 2020 and 2024 the metro moved 3.9 points toward the Republican candidate; the 2024 margin was 7.3 points.
A population of 164,350, a 80% non-Hispanic-white share, and a median household income of $75,673 describe the metro. The metro's voting pattern over the last decade is most similar to that of Cedar Rapids, IA and Duluth, MN-WI.
Akashic
Political twins — metros
The metros 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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Janesville-Beloit, WI, Wisconsin. Akashic. https://akashic.app/cbsa/27500/. Accessed May 20, 2026. License: CC BY 4.0.
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How did Janesville-Beloit, WI, Wisconsin vote in 2024?
In 2024, Janesville-Beloit, WI, Wisconsin voted Democratic by 7.3 points (D+7.3), carried by the Democratic candidate. Out of 88,310 votes cast, 46,642 went Democratic and 40,218 went Republican.
When did Janesville-Beloit, WI, Wisconsin last vote Republican?
The most recent presidential election in which Janesville-Beloit, WI, Wisconsin voted Republican was 1984.
How many people live in Janesville-Beloit, WI, Wisconsin?
Janesville-Beloit, WI, Wisconsin has a population of 164,350 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Janesville-Beloit, WI, Wisconsin?
Median household income in Janesville-Beloit, WI, Wisconsin is $75,673 — below the national median of $80,734. The Wisconsin state median is $77,485.
What is the political history of Janesville-Beloit, WI, Wisconsin?
Akashic tracks 34 presidential elections in Janesville-Beloit, WI, Wisconsin from 1892 to 2024. Of those, 12 went Democratic and 22 went Republican.
