Harding County ranks 52nd in the Coyote State for the total acreage of land currently advertised for sale. Buffalo featured the most land for sale. Its economy is defined as agricultural, with 250 farms recorded in the county during the most recent U.S. Census. Farming activities in Harding County generate annual revenues of $3 million, the majority of which comes from livestock products. Harding County is one of the ten biggest counties in South Dakota (2,678 square miles). It's located in the Black Hills & Badlands South Dakota region of South Dakota.