The combined value of farms, ranches, and rural real estate for sale in Big Horn County recently on Land.com was around $111 million. This represents around 100,000 acres of farms, ranches, hunting land and other land for sale in Big Horn County. Big Horn County ranks 12th in the state for the total acreage of land currently advertised for sale. Greybull featured the most land for sale. Mining and mineral extraction-related services are the main economic drivers in this part of Wyoming. Big Horn County is Wyoming's 13th biggest county (3,158 square miles). It's located in the Northwest Wyoming region of the state.