Navajo County is located in the northern part of Arizona and is the third largest county in the state. It is bordered by Apache County to the east, Coconino County to the north, Gila County to the south, and the state of Utah to the west. The county seat is Holbrook.

The county is home to the Navajo Nation, the largest Native American reservation in the United States. The county is also home to the Hopi Nation, the White Mountain Apache Tribe, and the San Juan Southern Paiute Tribe.

The economy of Navajo County is largely based on agriculture, tourism, and mining. The county is home to the Navajo Generating Station, a coal-fired power plant that is the largest in the western United States.

Navajo County is governed by a five-member Board of Supervisors, which is elected by the residents of the county. The county is divided into five districts, each of which is represented by one supervisor. The county also has a county manager, who is appointed by the Board of Supervisors.

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