The value of all farms, ranches, hunting land and other land for sale in San Juan County recently was nearly $47 million, representing a total of 4,087 acres of land for sale in San Juan County. San Juan County ranks 21st out of 29 counties in Utah for the combined amount of land currently advertised for sale. Of all farms and ranches 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.