Of 66 counties in the Mount Rushmore State, Roberts County is 27th in terms of its size (1,135 square miles). Roberts County is in Glacial Lakes & Prairies South Dakota. There is nearly 1,000 acres of recreational land and property for sale in South Dakota's Roberts County based on recent Land Network data. The combined market value of farms, ranches, hunting land and other land for sale here is around $800,000. Browse all recreational property for sale in Roberts County 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. The most common type of land for sale by combined acreage in Roberts County is undeveloped land.