United States Department of the Interior

The United States Department of the Interior (DOI) is a Cabinet department of the United States government that manages and conserves most federally-owned land. These responsibilities are quite different than Interior Departments of other nations, which tend to focus on police or security. The U.S. Department of the Interior is not responsible for local government or for civil administration except in the cases of Indian reservations.

Operating units

• National Park Service
• U.S. Fish and Wildlife Service
• Bureau of Indian Affairs
• Bureau of Land Management
• Minerals Management Service
• Office of Surface Mining, Reclamation, and Enforcement
• U.S. Geological Survey
• Bureau of Reclamation
• Office of Insular Affairs