The value of all farms, ranches, and rural real estate for sale in Utah's San Juan County recently was around $48 million, representing a combined 4,089 acres of land for sale in San Juan County. San Juan County ranks 20th in Utah for the total acreage of land currently advertised for sale. Of all ranches, farms, hunting land and other rural land and acreage for sale in San Juan County, Moab featured 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 the state.