Of 66 counties in the Mount Rushmore State, Walworth County ranks 45th by size (744 square miles). Walworth County is in Great Lakes South Dakota. There is almost 1,000 acres of ranches for sale in Walworth County, South Dakota, based on recent Land Network data. The combined market value of ranches, farms, hunting land and other rural land and acreage for sale here is about $400,000. Browse all Walworth County ranches for sale on the Land Network to find the ranch that's right for your business or commercial needs, from the sprawling legacy ranch to unbelievable residential ranch for your second home, investment property or retirement nest egg. The most common type of land for sale by combined acreage in Walworth County is residential property.