South Dakota·SD·FIPS 46127

Union County

Voted Republican in 2024 · 8,876 votes cast

About Union County

Union County is the southernmost county in the U.S. state of South Dakota. As of the 2020 census, the population was 16,811, making it the 13th most populous county in South Dakota. Its county seat has been Elk Point since April 30, 1865. Originally named Cole County, its name was changed to Union on January 7, 1864, because of Civil War sentiment.

2024 Presidential Results

All candidates · Union County, South Dakota

Donald J Trump(Republican)

69.4%6,160

Won by 3,612 votes

Kamala D Harris(Democrat)

28.7%2,548

Other(Other)

1.3%112

Chase Oliver(Libertarian)

0.6%56

Margin History

Red = Republican, Blue = Democratic

2024R+40.7

2020R+36.4

2016R+38.8

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Swung Right in 2024

Union County shifted 4.3 points toward Republicans compared to 2020. Voter turnout increased by 0.2%.

Union County — Local Discussion

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What does Union County really think?

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