The Hopi are a Native American tribe, who primarily live on the Hopi Reservation in northeastern Arizona. According to the 2010 census, there were 19,327 Hopi in the United States. The Hopi language is one of 30 in the Uto-Aztecan language family. The majority of Hopi people are enrolled in the Hopi Tribe of Arizona but some are enrolled in the Colorado River Indian Tribes. The Hopi Reservation covers a land area of 2,531.773 sq mi (6,557.26 km2) .

When first encountered by the Spanish in the 16th century, the Hopi and the surrounding cultures were referred to as Pueblo people, because they lived in villages (pueblos in the Spanish language). The Hopi are descended from the Ancient Pueblo Peoples who constructed large apartment-house complexes, and had an ancient Native American culture that spanned the present-day Four Corners region of the United States, comprising southeastern Utah, northeastern Arizona, northwestern New Mexico, and southwestern Colorado.

The name Hopi is a shortened form of their autonym, Hopituh Shi-nu-mu ("The Peaceful People" or "Peaceful Little Ones"). The Hopi Dictionary gives the primary meaning of the word "Hopi" as: "behaving one, one who is mannered, civilized, peaceable, polite, who adheres to the Hopi way." In the past, Hopi sometimes used the term "Hopi" and its cognates to refer to the Pueblo peoples in general, in contrast to other, more warlike tribes.

More Info: en.wikipedia.org