Gregory County is in Great Lakes South Dakota. Of the 66 counties in the state, Gregory County ranks 30th in terms of size (1,053 square miles). There is 1,000 acres of residential land and property for sale in South Dakota's Gregory County based on recent Land Network data. The combined market value of farms and ranches for sale here is roughly $3 million. The average price of residential acreage for sale in Gregory County was $668,750. The economy here is principally agricultural. Browse all residential land and rural property for sale in South Dakota 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.