Tuba City (Navajo: Tó Naneesdizí) is a census-designated place (CDP) in Coconino County, Arizona, United States. It is the second-largest community in Coconino County. The population 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 town of Moenkopi lies directly to its southeast.
The name of the town honors Tuuvi, a Hopi headman from Oraibi who converted to Mormonism. The Navajo name for Tuba City, Tó Naneesdizí translates as "tangled waters", which probably refers to the many springs below the surface of the ground which 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 Paul Gosar.