Idaho·ID·FIPS 16027

Canyon County

Voted Republican in 2024 · 101,030 votes cast

About Canyon County

Canyon County is located in the U.S. state of Idaho. As of the 2020 Census, the population was 231,105, which by 2025 was estimated to have risen to 275,123, making it the second-most populous county in Idaho. The county seat is Caldwell, and its largest city is Nampa. Canyon County is part of the Boise metropolitan area.

2024 Presidential Results

All candidates · Canyon County, Idaho

Donald J Trump(Republican)

72.0%72,755

Won by 47,086 votes

Kamala D Harris(Democrat)

25.4%25,669

Other(Other)

2.1%2,164

Chase Oliver(Libertarian)

0.4%442

Margin History

Red = Republican, Blue = Democratic

2024R+46.6

2020R+39.7

2016R+41.7

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Swung Right in 2024

Canyon County shifted 6.9 points toward Republicans compared to 2020. Voter turnout increased by 11.7%.

Canyon County — Local Discussion

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What does Canyon County really think?

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