The value of farms, ranches, hunting land and other land for sale in Union County recently on Land.com was nearly $27 million. This represents approximately 100,000 acres of land for sale in Union County. Union County ranks 31st in New Mexico for the total number of acres of land currently advertised for sale. Among cities in Union County with farms, ranches, hunting land and other land for sale, Clayton had the most land for sale. Its economy is defined as agricultural, with 353 farms recorded in the county during the most recent 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 the 15th largest county (3,831 square miles) in New Mexico. It's located in the Northeast New Mexico region of the state.