Bennett County ranks 52nd out of 66 counties in the state for the total number of acres of land currently advertised for sale. Among cities in Bennett County with farms and ranches for sale, Martin had the most land for sale. Agriculture and farming drives the Bennett County economy, with 219 farms recorded in the county during the U.S. Census in 2012. Farming activities in Bennett County generate annual revenues of $5 million, the majority of which comes from livestock products. Bennett County is South Dakota's 23rd largest county (1,190 square miles). It's located in the Black Hills & Badlands South Dakota region of the state.