Land for sale in South Dakota's Hanson County recently totaled nearly $2 million and almost 1,000 acres. Hanson County ranks 45th out of 66 counties in the Coyote State for the total number of acres of land currently advertised for sale. Spencer had the most land for sale. Hanson County has a large agricultural economy, with 370 farms recorded in the county during the latest U.S. Census. Farming activities in Hanson County generate annual revenues of $15 million, most of which is from crops. Hanson County is the 64th largest county (435 square miles) in South Dakota. It's located in the Southeast South Dakota region of South Dakota.