Roberts County is in Glacial Lakes & Prairies South Dakota. Of the 66 counties in the state, 726,897-acre Roberts County ranks 27th by size. There is almost 1,000 acres of residential land and property for sale in Roberts County, South Dakota, based on recent Land Network data. The combined market value of farms, ranches, hunting land and other land for sale here is about $3 million. The average price of residential acreage for sale in Roberts County was $727,475. 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.