The overall value of farms, ranches, and rural real estate for sale in San Juan County recently on Land.com was approximately $46 million. This represents nearly 5,000 acres of farms and ranches for sale in San Juan County. San Juan County ranks 21st out of 29 counties in the state for the total number of acres of land currently advertised for sale. Of all locations in San Juan County with ranches, farms, hunting land and other rural land and acreage for sale, Monticello had the most land for sale. Economically speaking, San Juan County's is largely dependent on mining and mineral extraction-related businesses and services. San Juan County is the largest county in Utah (7,933 square miles). It's located in the East Utah region of Utah.