Supai (Havasupai: Havasuuw) is a town in Coconino County, Arizona, Unite States. As of the 1990 census, the town had a population of 423; the 2000 census erroneously recorded a population of 0 for the town. The town is the capital of the Havasupai Indian Reservation. Supai is currently the only town in the United States where mail is still carried out by mules. It is also the most remote town in the lower 48 states, and the only way to get to it is to hike, ride a mule, or take a helicopter. Supai is eight miles (13 km) from the nearest road. There are no cars in the town.