Fall River County is in Black Hills & Badlands South Dakota. Of the 66 counties in the Coyote State, Fall River County is 12th in terms of its size (1 million acres). South Dakota's Fall River County includes roughly 1,000 acres of residential land for sale based on recent Land Network data. The combined market value of land for sale here was nearly $23 million. The average price of residential land for sale in Fall River County was $489,737. 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.