The value of farms, ranches, hunting land and other land for sale in Dona Ana County, New Mexico, recently on Land.com was approximately $243 million. This represents approximately 6,000 acres of farms, ranches, hunting land and other land for sale in Dona Ana County. Dona Ana County ranks sixth in the Land of Enchantment for the total number of acres of land currently advertised for sale. Of all locations in Dona Ana County with land and rural real estate for sale, Las Cruces featured the most land for sale. Dona Ana County is New Mexico's 16th biggest county (3,814 square miles). It's located in the Southwest New Mexico region of New Mexico.