There was a combined approximately $10 million of ranches, farms, hunting land and other rural land and acreage for sale in Gregory County, South Dakota, recently on Land.com. The total acreage of all Gregory County farms, ranches, and rural real estate for sale was approximately 3,000 acres. Gregory County ranks 30th in the Coyote State for the total acreage of land currently advertised for sale. Gregory 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 the state.