The largest Indian tribe in the U.S today?

The largest Indian tribe in the U.S. today is the Navajo Nation, which spans parts of Arizona, New Mexico, and Utah. With a membership of over 300,000, the Navajo Nation is known for its rich cultural heritage, including traditional arts, language, and ceremonies. The tribe operates its own government and institutions, making it one of the most prominent Native American tribes in terms of population and land area.