Land for sale in South Dakota's Bennett County recently totaled almost $2 million and around 2,000 acres. Bennett County ranks 51st out of 66 counties in the Mount Rushmore State for the total number of acres of land currently advertised for sale. Of all locations in Bennett County with farms, ranches, hunting land and other land for sale, Martin featured 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 biggest county (1,190 square miles). It's located in the Black Hills & Badlands South Dakota region of South Dakota.