

This is located in the area among the four sacred Navajo mountains of Dookʼoʼoosłííd ( San Francisco Peaks), Dibé Ntsaa ( Hesperus Mountain), Sisnaajiní ( Blanca Peak), and Tsoodził ( Mount Taylor). Neither of these terms should be confused with " Dinétah," the term used for the traditional homeland of the Navajo. This contrasts with " Diné Bikéyah" and " Naabeehó Bikéyah" for the general idea of "Navajoland". In Navajo, the geographic entity with its legally defined borders is known as " Naabeehó Bináhásdzo". In 2017, the Navajo Nation Council rejected legislation to change the name to "Diné Nation," citing potential "confusion and frustration among Navajo citizens and non-Navajos." Among the Navajo populace, both terms are employed. In the Navajo language, Diné means "the People", a term many indigenous nations identify within their respective languages. Some people said that Diné represented the people in their time of suffering before the Long Walk, and that Navajo is the appropriate designation for the future. In 1994, the Tribal Council rejected a proposal to change the official designation from "Navajo" to "Diné", a traditional name for the people. On April 15, 1969, the tribe changed its official name to the "Navajo Nation", which is displayed on its seal. In English, the official name for the area was "Navajo Indian Reservation", as outlined in Article II of the 1868 Treaty of Bosque Redondo. It is one of a few indigenous nations whose reservation lands overlap its traditional homelands.

Unlike many reservations, it has expanded several times since its establishment in 1868 to include most of northeastern Arizona, a sizable portion of northwestern New Mexico, and most of the area south of the San Juan River in southeastern Utah. The reservation was within New Mexico Territory and straddled what became the Arizona-New Mexico border in 1912, when the states were admitted to the union. The United States gained ownership of this territory in 1848 after acquiring it in the Mexican-American War. The seat of government is located in Window Rock, Arizona. In 2010, the reservation was home to 173,667 out of 332,129 Navajo tribal members the remaining 158,462 tribal members lived outside the reservation, in urban areas (26 percent), border towns (10 percent), and elsewhere in the U.S.

It occupies portions of northeastern Arizona, northwestern New Mexico, and southeastern Utah at roughly 17,544,500 acres (71,000 km 2 27,413 sq mi), the Navajo Nation is the largest land area held by a Native American tribe in the U.S., exceeding ten U.S. The Navajo Nation ( Navajo: Naabeehó Diné Biyaad), also known as Navajoland, is a Native American reservation of Navajos in the United States.
