Rock County, Wisconsin
AkashicRock County, WIHarrisD+7.3
2024 precinct map of Rock CountyPrecinct-level 2024 presidential results for Rock County, with each precinct boundary colored by Democratic-vs-Republican margin, and gold where an independent or third-party candidate carried the precinct.
How it voted
Share of the 2024 vote
| Kamala Harris ✓Democratic | 52.8% | 46,642 |
|---|---|---|
| Donald TrumpRepublican | 45.5% | 40,218 |
| Robert F KennedyIndependent | 0.6% | 497 |
Harris +50Trump +50
99 precincts · 88,310 votes. Hover any precinct for its result.
The precinct map shows the 2024 presidential vote; the timeline scrubs the county’s overall result across 1892–2024.
38 presidential elections
| Year | Won | Democratic | Republican | Other | Margin | Total |
|---|---|---|---|---|---|---|
| D | 52.8%Harris46,642 | 45.5%Trump40,218 | 0.6%Kennedy497 | 88,310 | ||
| D | 54.7%Biden46,658 | 43.5%Trump37,138 | 1.3%Jorgensen1,094 | 85,360 | ||
| D | 51.7%Clinton39,339 | 41.4%Trump31,493 | 3.8%Johnson2,859 | 76,074 | ||
| D | 61.0%Obama49,219 | 37.8%Romney30,517 | 0.6%Gray470 | 80,690 | ||
| D | 63.8%Obama50,529 | 34.6%McCain27,364 | 1.6%Nader1,276 | 79,169 | ||
| D | 57.9%Kerry46,598 | 41.2%Bush33,151 | 0.9%Nader730 | 80,479 | ||
| D | 57.5%Gore40,472 | 39.0%Bush27,467 | 2.8%Nader1,980 | 70,404 | ||
| D | 53.8%Clinton32,450 | 33.3%Dole20,096 | 11.3%Perot6,800 | 60,320 | ||
| D | 45.1%Clinton31,154 | 31.8%Bush21,942 | 22.7%Perot15,700 | 69,025 | ||
| D | 50.8%Dukakis29,576 | 48.4%Bush28,178 | 0.7%Scattering434 | 58,188 | ||
| R | 44.5%Mondale26,433 | 54.8%Reagan32,491 | 0.7%Bergland410 | 59,334 | ||
| R | 40.4%Carter24,740 | 50.6%Reagan30,960 | 9.0%Anderson5,482 | 61,182 | ||
| R | 48.6%Carter28,048 | 49.0%Ford28,325 | 2.4%McCarthy1,389 | 57,762 | ||
| R | 40.2%McGovern21,033 | 58.0%Nixon30,361 | 1.8%Schmitz925 | 52,319 | ||
| R | 41.6%Humphrey20,567 | 51.0%Nixon25,229 | 7.5%Wallace3,697 | 49,493 | ||
| D | 58.0%Johnson28,257 | 41.8%Goldwater20,372 | 0.1%Hass55 | 48,684 | ||
| R | 39.2%Kennedy19,194 | 60.6%Nixon29,675 | 0.2%Byrd76 | 48,945 | ||
| R | 32.2%Stevenson13,834 | 67.4%Eisenhower28,980 | 0.4%Andrews173 | 42,987 | ||
| R | 35.3%Stevenson15,183 | 64.6%Eisenhower27,837 | 0.1%Hallinan45 | 43,065 | ||
| R | 47.9%Truman16,150 | 50.7%Dewey17,068 | 1.4%Thurmond474 | 33,692 | ||
| R | 47.4%Roosevelt16,766 | 52.2%Dewey18,477 | 0.4%Thomas133 | 35,376 | ||
| R | 46.3%Roosevelt17,543 | 53.1%Willkie20,141 | 0.6%Thomas214 | 37,898 | ||
| D | 53.3%Roosevelt17,991 | 43.6%Landon14,693 | 3.1%Lemke1,045 | 33,729 | ||
| R | 42.0%Roosevelt12,612 | 56.1%Hoover16,825 | 1.9%Thomas571 | 30,008 | ||
| R | 28.7%Smith8,726 | 70.8%Hoover21,497 | 0.5%Thomas161 | 30,384 | ||
| R | 6.0%Davis1,453 | 60.9%Coolidge14,815 | 33.1%La Follette8,052 | 24,320 | ||
| R | 12.7%Cox2,447 | 83.5%Harding16,152 | 3.8%Debs738 | 19,337 | ||
| R | 35.0%Wilson4,015 | 61.1%Hughes7,011 | 3.9%Benson451 | 11,477 | ||
| R | 30.6%Wilson3,032 | 43.2%Taft4,276 | 26.1%Roosevelt2,587 | 9,895 | ||
| R | 27.5%Bryan3,227 | 66.8%Taft7,839 | 5.7%Debs668 | 11,734 | ||
| R | 21.1%Parker2,348 | 71.6%Roosevelt7,972 | 7.3%Debs807 | 11,127 | ||
| R | 26.2%Bryan3,094 | 70.0%McKinley8,249 | 3.8%Woolley447 | 11,790 | ||
| R | 29.8%Bryan3,655 | 67.5%McKinley8,282 | 2.8%Palmer340 | 12,277 | ||
| R | 38.6%Cleveland4,231 | 55.2%Harrison6,052 | 6.1%Weaver673 | 10,956 | ||
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presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
| 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
Rock County anchors south-central Wisconsin around Janesville, a former GM factory town whose blue-collar workforce has made it a consistent but narrowing Democratic margin county in statewide races.
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 county 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 county. The county's voting pattern over the last decade is most similar to that of Lucas County and Iowa County.
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All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Rock County, Wisconsin. Akashic. https://akashic.app/county/55105/. Accessed May 20, 2026. License: CC BY 4.0.
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Cities & towns in Rock County
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Frequently asked questions
How did Rock County, Wisconsin vote in 2024?
In 2024, Rock County, 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 Rock County, Wisconsin last vote Republican?
The most recent presidential election in which Rock County, Wisconsin voted Republican was 1984.
How many people live in Rock County, Wisconsin?
Rock County, 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 Rock County, Wisconsin?
Median household income in Rock County, Wisconsin is $75,673 — below the national median of $80,734. The Wisconsin state median is $77,485.
What is the political history of Rock County, Wisconsin?
Akashic tracks 38 presidential elections in Rock County, Wisconsin from 1876 to 2024. Of those, 12 went Democratic and 22 went Republican.