Colorado·CO·FIPS 08013

Boulder County

Voted Democratic in 2024 · 196,150 votes cast

About Boulder County

Boulder County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 330,758. The most populous municipality in the county and the county seat is Boulder. Boulder County comprises the Boulder, Colorado Metropolitan Statistical Area, which is included in the 12-county Denver-Aurora-Greeley, CO Combined Statistical Area.

2024 Presidential Results

All candidates · Boulder County, Colorado

Kamala D Harris(Democrat)

76.5%150,149

Won by 109,391 votes

Donald J Trump(Republican)

20.8%40,758

Other(Other)

2.0%3,980

Chase Oliver(Libertarian)

0.6%1,263

Margin History

Red = Republican, Blue = Democratic

2024D+55.8

2020D+56.6

2016D+48.3

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Swung Right in 2024

Boulder County shifted 0.8 points toward Republicans compared to 2020. Voter turnout decreased by 4.8%.

Boulder County — Local Discussion

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