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Ohio·OH·FIPS 39147

Seneca County

Voted Republican in 2024 · 25,263 votes cast

Seneca County

About Seneca County

Seneca County is a county located in the northwestern part of the U.S. state of Ohio. As of the 2020 census, the population was 55,069. Its county seat is Tiffin. The county was created in 1820 and organized in 1824. It is named for the Seneca Indians, the westernmost nation of the Iroquois Confederacy. This people were based in present-day New York but had territory extending into Pennsylvania and Ohio. Seneca County comprises the Tiffin, OH Micropolitan Statistical Area, which is also included in the Findlay–Tiffin, OH Combined Statistical Area.

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Total Votes (2024)
25,263
Winner Margin
R+37.5
Turnout Change
-2.1%
2020→2024 Swing
R+3.3

2024 Presidential Results

All candidates · Seneca County, Ohio

Donald J Trump(Republican)
68.2%17,241
Won by 9,476 votes
Kamala D Harris(Democrat)
30.7%7,765
Chase Oliver(Libertarian)
0.5%129
Other(Other)
0.5%128

Margin History

Red = Republican, Blue = Democratic

2024R+37.5
2020R+34.2
2016R+30.9
🔴

Swung Right in 2024

Seneca County shifted 3.3 points toward Republicans compared to 2020. Voter turnout decreased by 2.1%.

Seneca County — Local Discussion

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What does Seneca County really think?

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