Seneca County is in Northwest Ohio. Of the 88 counties in the Buckeye State, Seneca County ranks 22nd in terms of size (552 square miles). The total value of about 1,000 acres of residential land recently listed for sale in Seneca County, Ohio, was roughly $5 million. The average price of residential land for sale in Seneca County was $236,715. Browse all residential land and rural property for sale in Ohio to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.