The Bureau of Indian Affairs (BIA), also known as Indian Affairs (IA), is a United States federal agency within the Department of the Interior. It is responsible for implementing federal laws and policies related to Native Americans and Alaska Natives, and administering and managing over 55,700,000 acres (225,000 km) of reservations held in trust by the U.S. federal government for indigenous tribes. It renders services to roughly 2 million indigenous Americans across 574 federally recognized tribes. The BIA is governed by a director and overseen by the assistant secretary for Indian affairs, who answers to the secretary of the interior.
The BIA works with tribal governments to help administer law enforcement and justice; promote development in agriculture, infrastructure, and the economy; enhance tribal governance; manage natural resources; and generally advance the quality of life in tribal communities. Educational services are provided by Bureau of Indian Education—the only other agency under the Assistant Secretary for Indian affairs—while health care is the responsibility of the U.S. Department of Health and Human Services through its Indian Health Service.