Land for sale in Union County recently totaled nearly $28 million and approximately 100,000 acres. Union County ranks 30th in the Land of Enchantment for the total number of acres of land currently advertised for sale. There were two properties listed as sold in Union County through the Land Network Comparable Sales Program. This represented a total value of $1,200,003. Clayton had the most land for sale. Agriculture and farming drives the Union County economy, with 353 farms recorded in the county during the U.S. Census in 2012. Farming activities in Union County generate annual revenues of $2 million, the majority of which comes from livestock products. Union County is the 15th biggest county (3,831 square miles) in New Mexico. It's located in the Northeast New Mexico region of New Mexico.