A total of nearly 100,000 acres were listed for sale in South Dakota's Sully County recently, representing a combined nearly $181 million in Sully County land and rural real estate for sale. Based on the combined acreage of land and rural property for sale here, Sully County has the most land for sale of the 66 counties in the Coyote State. Pierre featured the most land for sale. Agriculture and farming drives the Sully County economy, with 191 farms recorded in the county during the U.S. Census in 2012. Farming activities in Sully County generate annual revenues of $7 million, most of which is from crops. Sully County is the 29th biggest county (1,070 square miles) in South Dakota. It's located in the Great Lakes South Dakota region of the state.