Idaho·ID·FIPS 16051

Jefferson County

Voted Republican in 2024 · 15,820 votes cast

About Jefferson County

Jefferson County is a county located in the U.S. state of Idaho. As of the 2020 Census, the county's population was 30,891. The county seat and largest city is Rigby. The county was established in 1913 and named after Thomas Jefferson, the third U.S. President. Jefferson County is part of the Idaho Falls metropolitan area.

2024 Presidential Results

All candidates · Jefferson County, Idaho

Donald J Trump(Republican)

85.2%13,481

Won by 11,590 votes

Kamala D Harris(Democrat)

12.0%1,891

Other(Other)

2.3%360

Chase Oliver(Libertarian)

0.6%88

Margin History

Red = Republican, Blue = Democratic

2024R+73.3

2020R+73.6

2016R+65.0

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Swung Left in 2024

Jefferson County shifted 0.4 points toward Democrats compared to 2020. Voter turnout increased by 11.6%.

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)