Seneca County, Ohio

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Seneca County, Ohio
Map of Seneca County Ohio With Municipal and Township Labels.PNG
Map of Seneca County, Ohio With Municipal and Township Labels
Seal of Seneca County, Ohio
Seal
Map of Ohio highlighting Seneca County
Location in the U.S. state of Ohio
Map of the United States highlighting Ohio
Ohio's location in the U.S.
FoundedApril 1, 1824
Named forthe Seneca nation
SeatTiffin
Largest cityTiffin
Area
 • Total553 sq mi (1,432 km2)
 • Land551 sq mi (1,427 km2)
 • Water1.8 sq mi (5 km2), 0.3%
Population
 • (2010)56,745
 • Density103/sq mi (40/km2)
Congressional district4th
Time zoneEastern: UTC−5/−4
Websitewww.senecaco.org

Seneca County is a county in the U.S. state of Ohio. In 2010, 56,745 people lived there. The county seat is Tiffin. It is named for the Seneca Indians.