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
- Toll Free: 800-424-5081
- Eastern Regional Office - Herndon, VA: 703-487-8035
- Central Regional Office - Lakewood, CO: 303-236-8296
OIG Hotline Poster
Download, print, and share the OIG Hotline poster to increase awareness of how to deter, detect, and disclose fraud, waste, abuse, and mismanagement.
- Review the Information Quality Guidelines, which are meant to ensure and maximize the quality, objectivity, utility, and integrity of Government information disseminated to the public.
- Information Quality Form
Questions, Feedback, or Report Notifications
The Office of Inspector General offers report notification emails and welcomes any inquiries or suggestions by contacting the Webmaster.