Roberts County is in Glacial Lakes & Prairies South Dakota. Of the 66 counties in the Coyote State, Roberts County is 27th in terms of its size (726,897 acres). Recent listings of residential land for sale in South Dakota's Roberts County totals approximately 1,000 acres and a combined market value of $5 million. The most common type of land for sale by combined acreage in Roberts County is undeveloped land. The average price of residential acreage for sale in Roberts County was $502,240. 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.