Ottawa County is in Northwest Ohio. Of the 88 counties in the state, Ottawa County ranks 16th in terms of size (585 square miles). Recent Land Network data records nearly 1,000 acres of residential land and property for sale in Ohio's Ottawa County, which is valued at a combined $25 million. The average price of residential acreage for sale in Ottawa County was $1 million. 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.