Contact the Office of Federal Acknowledgment

Mailing Address

Department of the Interior
Office of the Assistant Secretary—Indian Affairs
Attention: Office of Federal Acknowledgment
Mail Stop 4071 MIB
1849 C Street NW
Washington, DC 20240

Office Phone:

(202) 513-7650

Office Fax:

(202) 219-3008

Hours of operation: Monday through Friday, 8:00 a.m. to 5:00 p.m., Eastern Time; holidays excluded.