Gregory County is in Great Lakes South Dakota. Of the 66 counties in the Mount Rushmore State, Gregory County is 30th in terms of its size (674,254 acres). South Dakota's Gregory County has about 2,000 acres of recreational land and property for sale based on recent Land Network data. The combined market value of land and rural real estate for sale here was roughly $8 million. The average price of recreational property for sale in Gregory County was $1 million. The economy here is largely agricultural. Browse all recreational property for sale in South Dakota to find the recreational tract that suits your lifestyle needs, from hunting and fishing properties for the outdoor enthusiast to undeveloped acreage ready for future residential-property development.