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Wisconsin·WI·FIPS 55055

Jefferson County

Voted Republican in 2024 · 50,146 votes cast

Jefferson County

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.

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Total Votes (2024)
50,146
Winner Margin
R+8.2
Turnout Change
+4.5%
2020→2024 Swing
D+7.1

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%.

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No one has claimed Jefferson County yet

Be the first citizen to represent your county in the Citizens' Assembly. Your vote will shift Jefferson County's position on the national map.

Claim Jefferson County

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)