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. The Hopi village of Moenkopi lies directly to its southeast.
The name of the town honors Tuuvi, a Hopi man from Oraibi who converted to Mormonism. The Navajo name for Tuba City, Tó Naneesdizí translates as "tangled waters", which probably refers to the many below-ground springs that are the source of several reservoirs.
Tuba City is located within the Painted Desert near the western edge of the Navajo Nation. The town is situated on U.S. Route 160, near the junction with Arizona State Route 264. Tuba City is located about 50 miles (80 km) from the eastern entrance to Grand Canyon National Park. Most of Tuba City's residents are Navajo, with a small Hopi minority. It is located within Arizona's 1st Congressional District, currently represented by Tom O'Halleran.