Department of the InteriorGovernment

The Department of the Interior (DOI) is a cabinet-level executive department of the United States federal government dedicated to managing public lands, mineral resources, and wildlife conservation. Its statutory mandate encompasses overseeing the National Park Service, the Bureau of Land Management, and the U.S. Geological Survey, while upholding federal treaty obligations to American Indian and Alaska Native nations through the Bureau of Indian Affairs. Established by Congress on March 3, 1849, to centralize domestic affairs such as patents, pensions, and Indian affairs, it historically evolved from the multi-purpose "Department of Everything Else" into the nation's principal environmental conservation and public resource steward.