Fall River County is in Black Hills & Badlands South Dakota. Of the 66 counties in the state, Fall River County ranks 12th in terms of size (1,749 square miles). Recent listings of residential land for sale in Fall River County, South Dakota, totals about 1,000 acres and a combined market value of about $18 million. The most common type of land for sale by combined acreage in Fall River County is residential property. The average price of residential acreage for sale in Fall River County was $398,057. 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.