Tuba City (Navajo: Tó Naneesdizí) is an unincorporated town in Coconino County, Arizona, on Navajo lands, in the 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 Navajo Nation's largest community, slightly larger than Shiprock, New Mexico, and the headquarters of the Western Navajo Agency.