Of 33 counties in the Land of Enchantment, Union County ranks 15th by size (3,831 square miles). Union County is in Northeast New Mexico. There is nearly 1,000 acres of horse farms for sale in Union County, New Mexico, based on recent Land Network data. The combined market value of farms and ranches for sale here is approximately $400,000. Browse all Union County horse farms for sale on the Land Network to find the equestrian property that's right for your future needs, whether you're a horse breeder, equestrian business or simply horse lover looking for stable facilities, grooming pens or grazing pasture for your own horses. The most common type of land for sale by combined acreage in Union County is ranches.