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Seneca County, Ohio
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Seneca County, Ohio Map
An detailed map of Seneca County. Click on a nearby County to view more information about that County.
Map of Townships in Seneca County, Ohio
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Map of Counties in Ohio
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About Seneca County, Ohio
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.
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This site has an interactive map of Ohio Counties. Click on the map to find your Ohio county, and view more details. You can also search for your address and use your GPS to find your Ohio County.
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