There was a total of $4 million of land and rural real estate for sale in Walworth County, South Dakota, recently on Land.com. The total size of all Walworth County ranches, farms, hunting land and other rural land and acreage for sale was around 1,000 acres. Walworth County ranks 41st out of 66 counties in South Dakota for the total acreage of land currently advertised for sale. Of all locations in Walworth County with farms, ranches, hunting land and other land for sale, Mobridge had the most land for sale. Walworth County is South Dakota's 45th biggest county (744 square miles). It's located in the Great Lakes South Dakota region of the state.