Hoopa (formerly, Hupa, Ho-pah, Hoo-pah, Hupo, and Up-pa) is an unincorporated community in Humboldt County, California. It is located 10 miles (16 km) south of Weitchpec, at an elevation of 328 feet (100 m). The ZIP Code is 95546.Hoopa is a rural town located entirely on the reservation of the Hupa. The federal designation of the area is the Hoopa Valley Indian Reservation. Hoopa is on the Trinity River.