Colorado·CO·FIPS 08059

Jefferson County

Voted Democratic in 2024 · 361,504 votes cast

About Jefferson County

Jefferson County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 582,910, making it the fourth-most populous county in Colorado. The county seat is Golden, which was Colorado's capital twice, and its most populous city is Lakewood.

2024 Presidential Results

All candidates · Jefferson County, Colorado

Kamala D Harris(Democrat)

58.3%210,875

Won by 70,370 votes

Donald J Trump(Republican)

38.9%140,505

Other(Other)

2.0%7,339

Chase Oliver(Libertarian)

0.8%2,785

Margin History

Red = Republican, Blue = Democratic

2024D+19.5

2020D+18.5

2016D+6.9

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Swung Left in 2024

Jefferson County shifted 0.9 points toward Democrats compared to 2020. Voter turnout decreased by 4.2%.

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No one has claimed Jefferson County yet

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Jefferson County — Local Discussion

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