Land for sale in Johnson County, Wyoming, recently totaled nearly $115 million and almost 100,000 acres. Johnson County ranks 12th out of 23 counties in the state for the combined amount of land currently advertised for sale. Among cities in Johnson County with farms, ranches, hunting land and other land for sale, Buffalo featured the most land for sale. Based on its natural assets, tourism and recreation are important contributors to the Johnson County economy. Johnson County is one of the ten largest counties in Wyoming (4,174 square miles). It's located in the Northeast Wyoming region of Wyoming.