Of 66 counties in the Mount Rushmore State, Gregory County is 30th in terms of its size (1,053 square miles). Gregory County is in Great Lakes South Dakota. There is 1,000 acres of horse farms for sale in South Dakota's Gregory County based on recent Land Network data. The combined market value of farms and ranches for sale here is roughly $700,000. Browse all Gregory County horse farms for sale on the Land Network to find the equestrian property that's right for your future needs, whether you're a horse breeder, equestrian business or simply horse lover looking for stable facilities, grooming pens or grazing pasture for your own horses. The most common type of land for sale by combined acreage in Gregory County is recreational property.