The value of farms, ranches, and rural real estate for sale in Roberts County, South Dakota, recently on Land.com was $7 million. This represents approximately 2,000 acres of farms and ranches for sale in Roberts County. Roberts County ranks 16th in the Coyote State for the total number of acres of land currently advertised for sale. Among cities in Roberts County with land for sale, Big Stone City had the most land for sale. Agriculture and farming drives the Roberts County economy, with 876 farms recorded in the county during the U.S. Census in 2012. Farming activities in Roberts County generate annual revenues of $16 million, most of which is from crops. Roberts County is the 27th largest county (1,135 square miles) in South Dakota. It's located in the Glacial Lakes & Prairies South Dakota region of the state.