Wisconsin·WI·FIPS 55055

Jefferson County

Voted Republican in 2024 · 50,146 votes cast

About Jefferson County

Jefferson County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 84,900. Its county seat is Jefferson. Jefferson County comprises the Watertown-Fort Atkinson, WI Micropolitan Statistical Area, which is also included in the Milwaukee-Racine-Waukesha, WI Combined Statistical Area.

2024 Presidential Results

All candidates · Jefferson County, Wisconsin

Donald J Trump(Republican)

57.4%28,771

Won by 8,197 votes

Kamala D Harris(Democrat)

41.0%20,574

Other(Other)

1.2%615

Chase Oliver(Libertarian)

0.4%186

Margin History

Red = Republican, Blue = Democratic

2024R+8.2

2020R+15.2

2016R+15.9

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Swung Left in 2024

Jefferson County shifted 7.1 points toward Democrats compared to 2020. Voter turnout increased by 4.5%.

Jefferson County — Local Discussion

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What does Jefferson County really think?

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