Land for sale in Custer County recently totaled $57 million and almost 2,000 acres. Custer County ranks sixth in the state for the total number of acres of land currently advertised for sale. There were three properties listed as sold in Custer County through the Land Network Comparable Sales Program. This represented a total value of $880,000. Among cities in Custer County with farms and ranches for sale, Custer featured the most land for sale. Government and state-level services are the main economic drivers in Custer County. Custer County is the 16th largest county (1,559 square miles) in South Dakota. It's located in the Black Hills & Badlands South Dakota region of the state.