South Dakota·SD·FIPS 46013

Brown County

Voted Republican in 2024 · 17,043 votes cast

About Brown County

Brown County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 38,301, making it the fourth most populous county in South Dakota, and was estimated to be 37,561 in 2025. Its county seat is Aberdeen. The county is named for Alfred Brown, of Hutchinson County, South Dakota, a Dakota Territory legislator in 1879.

2024 Presidential Results

All candidates · Brown County, South Dakota

Donald J Trump(Republican)

62.5%10,645

Won by 4,570 votes

Kamala D Harris(Democrat)

35.6%6,075

Other(Other)

1.5%251

Chase Oliver(Libertarian)

0.4%72

Margin History

Red = Republican, Blue = Democratic

2024R+26.8

2020R+23.0

2016R+25.8

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Swung Right in 2024

Brown County shifted 3.8 points toward Republicans compared to 2020. Voter turnout decreased by 2.9%.

Brown County — Local Discussion

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