Iowa·IA·FIPS 19095

Iowa County

Voted Republican in 2024 · 9,704 votes cast

About Iowa County

Iowa County is a county in the U.S. state of Iowa. As of the 2020 census, the population was 16,662, and was estimated to be 16,504 in 2025. The county seat is Marengo and the largest city is Williamsburg. Iowa County is one of seven counties in the United States to share the same name as the state in which they are located. The other six counties are Arkansas County, Hawaii County, Idaho County, New York County, Oklahoma County, and Utah County.

2024 Presidential Results

All candidates · Iowa County, Iowa

Donald J Trump(Republican)

125.1%12,136

Won by 5,336 votes

Kamala D Harris(Democrat)

70.1%6,800

Undervotes(Other)

3.9%376

Chase Oliver(Libertarian)

1.0%96

Margin History

Red = Republican, Blue = Democratic

2024R+27.5

2020R+25.5

2016R+23.8

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Swung Right in 2024

Iowa County shifted 2.0 points toward Republicans compared to 2020. Voter turnout decreased by 0.4%.

Iowa County — Local Discussion

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