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This page tells all about the duties, roles, and requirements of the Secretary of the Interior and the Interior. It is part of our United States Government series.

Department of the Interior Seal

Seal of the Department of the Interior

The Secretary of the Interior is the top official of the U.S. Department of the Interior. The department itself is responsible for a variety of functions including the preservation and conservation of America’s land and natural resources and the protection of wildlife. In all, the department manages over 507 million acres of land, 476 dams, and 348 reservoirs. Units under the Department of the Interior include the National Park Service (NPS), U.S. Fish and Wildlife Service (USWS), the Bureau of Indian Affairs (BIA) and the U.S. Geological Survey (USGS).

United States Government Navigation

Executive Branch


Legislative Branch

House of Representatives

Judicial Branch

Supreme Court
U.S. Court of Appeals
U.S. District Courts

Executive Department Heads

Secretary of Agriculture
Secretary of Commerce
Secretary of Defense
Secretary of Education
Secretary of Energy
Secretary of Health and Human Services
Secretary of Homeland Security
Secretary of Housing and Urban Development
Secretary of the Interior
Attorney General
Secretary of Labor
Secretary of State
Secretary of Transportation
Secretary of the Treasury
Secretary of Veterans Affairs

Government Structure


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