Yankton County is in Southeast South Dakota. Of the 66 counties in the state, Yankton County is 59th in terms of its size (532 square miles). Recent listings of residential land and property for sale in South Dakota's Yankton County totals nearly 1,000 acres and a combined market value of about $6 million. The most common type of land for sale by combined acreage in Yankton County is undeveloped land. The average price of residential acreage for sale in Yankton County was $500,971. 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.