There was a combined approximately $11 million of farms and ranches for sale in Gregory County, South Dakota, recently on Land.com. The total acreage of all Gregory County farms, ranches, hunting land and other land for sale was approximately 2,000 acres. Gregory County ranks 30th out of 66 counties in the Coyote State for the total acreage of land currently advertised for sale. Gregory had the most land for sale. Gregory County has a large agricultural economy, with 505 farms recorded in the county during the latest U.S. Census. 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.