A
- Absentee-Shawnee Tribe of Indians of Oklahoma
- Agua Caliente Band of Cahuilla Indians of the Agua Caliente Indian Reservation, California
- Ak Chin Indian Community of the Maricopa (Ak Chin) Indian Reservation, Arizona
- Alabama-Coushatta Tribe of Texas
(formerly the Alabama-Coushatta Tribes of Texas) - Alabama-Quassarte Tribal Town, Oklahoma
- Alturas Indian Rancheria, California
- Apache Tribe of Oklahoma
- Arapahoe Tribe of the Wind River Reservation, Wyoming
- Aroostook Band of Micmac
(formerly the Aroostook Band of Micmac Indians of Maine) - Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation, Montana
- Augustine Band of Cahuilla Indians, California
(formerly the Augustine Band of Cahuilla Mission Indians of the Augustine Reservation, California)
Read more about this topic: Federally Recognized Tribes