The overall value of farms and ranches for sale in Day County, South Dakota, recently on Land.com was around $6 million. This represents approximately 1,000 acres of farms and ranches for sale in Day County. Day County ranks 20th out of 66 counties in the Coyote State for the total acreage of land currently advertised for sale. Of all land 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 South Dakota's 28th biggest county (1,091 square miles). It's located in the Glacial Lakes & Prairies South Dakota region of South Dakota.