Land for sale in Union County recently totaled $29 million and nearly 100,000 acres. Union County ranks 31st out of 33 counties in the state 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. Of all farms, ranches, hunting land and other land for sale in Union County, Clayton featured 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 New Mexico's 15th biggest county (3,831 square miles). It's located in the Northeast New Mexico region of the state.