Coconino County
Federal Sentencing in Flagstaff, Arizona
Last reviewed: July 1, 2026
Flagstaff's federal courthouse serves Coconino, Navajo, Apache, and Yavapai counties. A large share of its docket comes from Major Crimes Act cases arising on Navajo Nation, Hopi, and Havasupai land under 18 U.S.C. § 1153.
Key takeaway
Flagstaff is Arizona's Indian Country docket. Serious offenses by Native Americans on tribal land are prosecuted federally under the Major Crimes Act and sentenced under the same national Guidelines used in Phoenix or Tucson.
Facts
- The federal courthouse at 123 N. San Francisco St. is the primary venue for federal cases in northern Arizona.
- Under the Major Crimes Act, serious offenses committed by Native Americans in Indian Country are prosecuted federally.
- Sentencing for assault, sexual abuse, and homicide on tribal land follows the same Guidelines that apply nationwide.
- The Tribal Law and Order Act (2010) expanded tribal-court sentencing authority but did not remove federal jurisdiction over Major Crimes.
Myths vs. reality
Myth: Tribal court and federal court can't both prosecute the same conduct.
Reality: Under the dual-sovereign doctrine, a tribal prosecution does not bar a later federal prosecution for the same act.
Myth: Assault cases from the reservation get lighter federal sentences.
Reality: Assault-resulting-in-serious-bodily-injury cases under 18 U.S.C. § 113 routinely produce multi-year Guidelines ranges, especially with weapon enhancements.
Myth: Flagstaff judges only handle small cases.
Reality: Flagstaff regularly hears felony trials, including homicide, sexual abuse, and firearms cases arising in Indian Country.
Figures
~37%
Coconino County land area that is tribal
~250
Major Crimes Act filings in the District of Arizona (annual)
~7% of docket
Federal violent-crime cases in the district
Frequently asked questions
Which counties does the Flagstaff federal courthouse cover?
Coconino, Navajo, Apache, and Yavapai counties, including the Navajo Nation, Hopi, Havasupai, and portions of the Hualapai and White Mountain Apache reservations.
Does double jeopardy stop a federal case after a tribal-court conviction?
No. Tribes and the federal government are separate sovereigns, so a tribal prosecution does not bar a later federal prosecution for the same conduct under the dual-sovereign doctrine.
Are Indian Country cases sentenced differently than other federal cases?
The same U.S. Sentencing Guidelines apply. What differs is jurisdictional analysis under the Major Crimes Act and the General Crimes Act, not the sentencing math.