Montana·MT·FIPS 30043

Jefferson County

Voted Republican in 2024 · 8,291 votes cast

About Jefferson County

Jefferson County is a county in Montana, United States. As of the 2020 census, the population was 12,085. Its county seat is Boulder. The county was created in 1865 and named for President Thomas Jefferson.

2024 Presidential Results

All candidates · Jefferson County, Montana

Donald J Trump(Republican)

66.9%5,544

Won by 3,028 votes

Kamala D Harris(Democrat)

30.3%2,516

Other(Other)

2.2%180

Chase Oliver(Libertarian)

0.6%51

Margin History

Red = Republican, Blue = Democratic

2024R+36.5

2020R+33.4

2016R+32.5

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Swung Right in 2024

Jefferson County shifted 3.2 points toward Republicans compared to 2020. Voter turnout increased by 1.7%.

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No one has claimed Jefferson County yet

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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)