The total value of land and rural real estate for sale in San Juan County recently on Land.com was approximately $9 million. This represents almost 1,000 acres of ranches, farms, hunting land and other rural land and acreage for sale in San Juan County. San Juan County ranks 55th out of 64 counties in the Rocky Mountain State for the total acreage of land currently advertised for sale. Of all locations in San Juan County with farms, ranches, hunting land and other land for sale, Silverton featured the most land for sale. San Juan County is the 60th biggest county (388 square miles) in Colorado. It's located in the Southwest Colorado region of the state.