Roberts County is in Glacial Lakes & Prairies South Dakota. Of the 66 counties in the state, Roberts County is 27th in terms of its size (1,135 square miles). The total value of nearly 1,000 acres of residential land and property recently listed for sale in South Dakota's Roberts County was $5 million. The average price of residential acreage for sale in Roberts County was $931,980. The county has a rural, farm-based economy. 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.