The total value of farms, ranches, and rural real estate for sale in Wyoming's Sweetwater County recently on Land.com was almost $19 million. This represents approximately 1,000 acres of farms and ranches for sale in Sweetwater County. Sweetwater County ranks 17th out of 23 counties in the state for the combined amount of land currently advertised for sale. Of all locations in Sweetwater County with land for sale, Rock Springs had the most land for sale. Economically speaking, Sweetwater County's is largely dependent on mining and mineral extraction-related businesses and services. Sweetwater County is the largest county in Wyoming (10,491 square miles). It's located in the Southwest Wyoming region of the state.