Ohio·OH·FIPS 39159

Union County

Voted Republican in 2024 · 37,301 votes cast

About Union County

Union County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 62,784. Its county seat is Marysville. Its name is reflective of its origins, being the union of portions of Franklin, Delaware, Madison, and Logan counties. Union County is part of the Columbus, Ohio Metropolitan Statistical Area.

2024 Presidential Results

All candidates · Union County, Ohio

Donald J Trump(Republican)

64.3%23,982

Won by 11,048 votes

Kamala D Harris(Democrat)

34.7%12,934

Chase Oliver(Libertarian)

0.6%241

Other(Other)

0.4%144

Margin History

Red = Republican, Blue = Democratic

2024R+29.6

2020R+31.5

2016R+37.8

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Swung Left in 2024

Union County shifted 1.9 points toward Democrats compared to 2020. Voter turnout increased by 11.5%.

Union County — Local Discussion

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