Wisconsin·WI·FIPS 55105

Rock County

Voted Democratic in 2024 · 88,310 votes cast

About Rock County

Rock County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 163,687. Its county seat is Janesville. Rock County comprises the Janesville–Beloit metropolitan statistical area and is included in the Madison–Janesville–Beloit combined statistical area.

2024 Presidential Results

All candidates · Rock County, Wisconsin

Kamala D Harris(Democrat)

52.8%46,642

Won by 6,424 votes

Donald J Trump(Republican)

45.5%40,218

Other(Other)

1.4%1,203

Chase Oliver(Libertarian)

0.3%247

Margin History

Red = Republican, Blue = Democratic

2024D+3.6

2020D+11.2

2016D+10.3

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Swung Right in 2024

Rock County shifted 7.5 points toward Republicans compared to 2020. Voter turnout increased by 3.5%.

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No one has claimed Rock County yet

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Rock County — Local Discussion

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Election data: MIT Election Data Science Lab, Harvard Dataverse (CC BY 4.0)