About half of Native Americans live on reservations, of which there are about 326, comprising roughly 56.2 million acres. The 16 million-acre Navajo Nation Reservation in Arizona, New Mexico, and Utah …About half of Native Americans live on reservations, of which there are about 326, comprising roughly 56.2 million acres. The 16 million-acre Navajo Nation Reservation in Arizona, New Mexico, and Utah …