Tuba City (Navajo: Tó Naneesdizí) is an unincorporated town in Coconino County, Arizona, on the Navajo Nation, United States. It is the second-largest community in Coconino County. The population of the census-designated place (CDP) was 8,611 at the 2010 census. It is the most populous community within the Navajo Nation, slightly larger than Shiprock, New Mexico, and the site of the headquarters of the Western Navajo Agency. The Hopi village of Moenkopi lies directly to its southeast, and Hopi also live in the city.