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 million acres). A recent survey of Land Network data includes almost 1,000 acres of residential land for sale in South Dakota's Fall River County, which is valued at a combined $20 million. The average price of residential land for sale in Fall River County was $480,352. 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.