The overall value of farms and ranches for sale in New Mexico's Union County recently on Land.com was almost $29 million. This represents 100,000 acres of farms, ranches, hunting land and other land for sale in Union County. Union County ranks 31st out of 33 counties in the Land of Enchantment for the combined amount of land currently advertised for sale. Among cities in Union County with farms, ranches, and rural real estate for sale, Clayton had the most land for sale. Union County has a large agricultural economy, with 353 farms recorded in the county during the latest U.S. Census. Farming activities in Union County generate annual revenues of $2 million, the majority of which comes from livestock products. Union County is New Mexico's 15th largest county (3,831 square miles). It's located in the Northeast New Mexico region of New Mexico.