Montana·MT·FIPS 30111

Yellowstone County

Voted Republican in 2024 · 81,391 votes cast

About Yellowstone County

Yellowstone County is the most populous county in the U.S. state of Montana. As of the 2020 census, the population was 164,731. Its county seat is Billings, the state's most populous city. Like the nearby national park, Yellowstone County is named after the Yellowstone River which roughly bisects the county, flowing southwest to northeast. The river, in turn, was named for the yellow sandstone cliffs in what is now Yellowstone County.

2024 Presidential Results

All candidates · Yellowstone County, Montana

Donald J Trump(Republican)

62.0%50,460

Won by 22,068 votes

Kamala D Harris(Democrat)

34.9%28,392

Other(Other)

2.4%1,925

Chase Oliver(Libertarian)

0.8%614

Margin History

Red = Republican, Blue = Democratic

2024R+27.1

2020R+24.0

2016R+27.1

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Swung Right in 2024

Yellowstone County shifted 3.1 points toward Republicans compared to 2020. Voter turnout decreased by 2.9%.

Yellowstone County — Local Discussion

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What does Yellowstone County really think?

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