Of 23 counties in the state, Sweetwater County ranks first in terms of size (10,491 square miles). Sweetwater County is in the Southwest Wyoming region. Sweetwater County, Wyoming, includes about 1,000 acres of residential land for sale based on recent Land Network data. The combined market value of land and rural real estate for sale here was nearly $5 million. The average price of residential land for sale in Sweetwater County was $516,422. Browse all residential land and rural property for sale in Wyoming to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.