The Navajo (also spelled Navaho; in Navajo: Diné, meaning "the people," or Naabeehó) (or Dineh in a common anglicization of the Navajo-language term) of the Southwestern United States are the second largest Native American tribe of the United States of America.

In the 2000 U.S. census, 298,197 people claimed to be fully or partly of Navajo ancestry.

The Navajo Nation constitutes an independent governmental body which manages the Navajo Indian reservation in the Four Corners area of the United States.

The Navajo language is spoken throughout the region, although most Navajo speak English as well.