Land for sale in Custer County, South Dakota, recently totaled nearly $94 million and nearly 7,000 acres. Custer County ranks third based on the combined acreage of land for sale among the 66 counties in the Coyote State. There were four properties listed as sold in Custer County through the Land Network Comparable Sales Program. This represented a total value of $1,728,500. Among cities in Custer County with farms, ranches, hunting land and other land for sale, Custer had the most land for sale. Government and state-level services are the main economic drivers in Custer County. Custer County is South Dakota's 16th largest county (1,559 square miles). It's located in the Black Hills & Badlands South Dakota region of the state.