Hardin County is in Central Ohio. Of the 88 counties in the Buckeye State, 470-square-mile Hardin County ranks 39th by size. Recent Land Network data totals about 1,000 acres of residential land and property for sale in Ohio's Hardin County, which is valued at a combined $5 million. The average price of residential acreage for sale in Hardin County was $343,233. 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.