Of 33 counties in the Land of Enchantment, Union County is 15th in terms of its size (3,831 square miles). Union County is in Northeast New Mexico. There is nearly 1,000 acres of riverfront land and property for sale in Union County, New Mexico, based on recent Land Network data. The combined market value of ranches, farms, hunting land and other rural land and acreage for sale here is around $2 million. Browse all waterfront property for sale in Union County on the Land Network to find the marina, lakefront and other recreational property that meets your needs, from waterside land perfect as a retirement investment to existing residential waterfront land and property for hunting, fishing and other outdoor-recreation pursuits! The most common type of land for sale by combined acreage in Union County is ranches.