Naco is a census-designated place (CDP) in Cochise County, Arizona, United States. Its population was 833 at the 2000 census. It is across the United States Mexico border from Naco, Sonora. The Naco port of entry is open 24 hours per day. The present-day town of Naco, Arizona, was established in the early 1900s. The area was originally settled by Opata Indians. Naco means "cactus" in the Opata language; it was named however, by combining the last two letters of Arizona and Mexico. Naco is home to the Turquoise Valley Golf Course, one of the oldest courses in Arizona, with a clubhouse dating back to the 1930s.