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Contact Us

Main Contact Information - Headquarters

U.S. Department of the Interior
Office of Inspector General
1849 C Street NW - Mail Stop 4428
Washington, D.C. 20240

Phone: 202-208-5745
Fax: 202-219-3856

Hotline

  • Toll Free: 800-424-5081
  • Eastern Regional Office: 703-487-8057
  • Central Regional Office: Lakewood, Colorado 303-236-8296
  • Western Regional Office: Sacramento, California 916-978-5630
Sacramento, CA

2800 Cottage Way
Suite E-2712
Sacramento, CA 95825

Audits Phone
916-978-5650

Audits Fax
916-978-5656

Investigations Phone
916-978-5630

Investigations Fax
916-978-5635

Lakewood, CO

12345 West Alameda Parkway
Suite 300
Lakewood, CO 80228

Audits Phone
303-236-9243

Audits Fax
303-236-8211

Investigations Phone
303-236-9243

Investigations Fax
303-236-8279

Atlanta, GA

61 Forsyth Street, SW.
Suite 8T12
Atlanta, GA 30303

Main Phone
770-801-7923

Main Fax
770-801-7924

Honolulu, HI

1132 Bishop Street
Suite 2300
Honolulu, HI 96813

Audits Phone
808-525-5310

Audits Fax
808-525-5322

Investigations Phone
808-525-5348

Investigations Fax
808-552-5349

Bilings, MT

Post Office Building
2602 First Avenue North
Room 136
Billings, MT 59101

Main Phone
406-657-6298

Main Fax
406-657-6319

Albuquerque, NM

2424 Louisiana Boulevard, NE.
Suite 250
Albuquerque, NM 87110

Audits Phone
505-346-2717

Audits Fax
505-346-2722

Investigations Phone
505-346-2721

Investigations Fax
505-346-2744

Rapid City, SD

333 West Boulevard
Suite 301
Rapid City, SD 57701

Main Phone
605-342-7280

Main Fax
605-342-8690

Information Quality

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