Hanson County ranks 61st in the Coyote State for the total number of acres of land currently advertised for sale. Canova featured 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 South Dakota's 64th largest county (435 square miles). It's located in the Southeast South Dakota region of South Dakota.