A total of approximately 1,000 acres were listed for sale in Day County recently, representing a total value of almost $6 million in Day County farms, ranches, hunting land and other land for sale. Day County ranks 20th in the Mount Rushmore State for the total acreage of land currently advertised for sale. Of all farms and ranches for sale in Day County, Webster had the most land for sale. Agriculture and farming drives the Day County economy, with 693 farms recorded in the county during the U.S. Census in 2012. Farming activities in Day County generate annual revenues of $9 million, most of which is from crops. Day County is the 28th largest county (1,091 square miles) in South Dakota. It's located in the Glacial Lakes & Prairies South Dakota region of the state.