Gregory County is in Great Lakes South Dakota. Of the 66 counties in the Mount Rushmore State, Gregory County ranks 30th in terms of size (1,053 square miles). The total value of approximately 2,000 acres of recreational land recently listed for sale in South Dakota's Gregory County was $9 million. The average price of recreational property for sale in Gregory County was $1 million. The economy here is mainly 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.