The value of farms and ranches for sale in South Dakota's Gregory County recently on Land.com was around $16 million. This represents around 4,000 acres of ranches, farms, hunting land and other rural land and acreage for sale in Gregory County. Gregory County ranks 22nd out of 66 counties in South Dakota for the combined amount of land currently advertised for sale. Of all locations in Gregory County with land and rural real estate for sale, Fairfax had the most land for sale. Agriculture and farming drives the Gregory County economy, with 505 farms recorded in the county during the U.S. Census in 2012. Farming activities in Gregory County generate annual revenues of $14 million, the majority of which comes from livestock products. Gregory County is South Dakota's 30th biggest county (1,053 square miles). It's located in the Great Lakes South Dakota region of South Dakota.