Land for sale in Roberts County, South Dakota, recently totaled almost $10 million and approximately 1,000 acres. Roberts County ranks 15th in South Dakota for the total acreage of land currently advertised for sale. There were four properties listed as sold in Roberts County through the Land Network Comparable Sales Program. This represented a total value of $2,817,808. Big Stone City had the most land for sale. Its economy is defined as agricultural, with 876 farms recorded in the county during the most recent U.S. Census. Farming activities in Roberts County generate annual revenues of $16 million, most of which is from crops. Roberts County is the 27th biggest county (1,135 square miles) in South Dakota. It's located in the Glacial Lakes & Prairies South Dakota region of South Dakota.