List of United States federal agencies in the context of "Executive Order 13166"

In United States law, an organic act is an act of the United States Congress that establishes an administrative agency or local government, for example, the laws that established territory of the United States and specified how they are to be governed, or established agency to manage certain federal lands. In the absence of organic law, the body of laws that define and establish a government, a territory is classified as unorganized.

The first such act was the Northwest Ordinance, passed in 1787 by the U.S. Congress of the Confederation (under the Articles of Confederation, predecessor of the United States Constitution). The Northwest Ordinance created the Northwest Territory in the land west of Pennsylvania and northwest of the Ohio River and set the pattern of development that was followed for all subsequent territories. The Northwest Territory covered more than 260,000 square miles and included all of the modern states of Ohio, Indiana, Illinois, Michigan, Wisconsin, and the northeastern part of Minnesota.

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.

The Congressional Budget Office (CBO) is a federal agency within the legislative branch of the United States government that provides budget and economic information to Congress.Inspired by California's Legislative Analyst's Office that manages the state budget in a strictly nonpartisan fashion, the CBO was created as a nonpartisan agency by the Congressional Budget and Impoundment Control Act of 1974.

Whereas politicians on both sides of the aisle have criticized the CBO when its estimates have been politically inconvenient, economists and other academics overwhelmingly reject that the CBO is partisan or that it fails to produce credible forecasts. There is a consensus among economists that "adjusting for legal restrictions on what the CBO can assume about future legislation and events, the CBO has historically issued credible forecasts of the effects of both Democratic and Republican legislative proposals."

The National Institute for Occupational Safety and Health (NIOSH, /ˈnaɪɒʃ/) is the United States federal agency responsible for conducting research and making recommendations for the prevention of work-related injury, illness, disability, and death. Its functions include gathering information, conducting scientific research both in the laboratory and in the field, and translating the knowledge gained into products and services. Among NIOSH's programs are determination of recommended exposure limits for toxic chemicals and other hazards, field research such as the Health Hazard Evaluation Program, epidemiology and health surveillance programs such as the National Firefighter Registry for Cancer, regulatory approval of respirators according to the NIOSH air filtration rating system, and compensation and support programs such as the World Trade Center Health Program.

The Occupational Safety and Health Act, signed by President Richard M. Nixon on December 29, 1970, created NIOSH out of the preexisting Division of Industrial Hygiene founded in 1914. NIOSH is part of the Centers for Disease Control and Prevention within the Department of Health and Human Services (HHS). Despite the similarities in names, it is not part of the National Institutes of Health or OSHA, which have distinct and separate responsibilities.

The Bureau of Reclamation, formerly the United States Reclamation Service, is a federal agency under the U.S. Department of the Interior, which oversees water resource management, specifically as it applies to the oversight and operation of the diversion, delivery, and storage projects that it has built throughout the western United States for irrigation, water supply, and attendant hydroelectric power generation. It is currently the U.S.'s largest wholesaler of water, bringing water to more than 31 million people, and providing one in five Western farmers with irrigation water for 10 million acres of farmland, which produce 60% of the nation's vegetables and 25% of its fruits and nuts. The Bureau is also the second largest producer of hydroelectric power in the western U.S.

On June 17, 1902, in accordance with the Reclamation Act, Secretary of the Interior Ethan Allen Hitchcock established the U.S. Reclamation Service within the U.S. Geological Survey (USGS). The new Reclamation Service studied potential water development projects in each western state with federal lands. Revenue from sale of federal lands was the initial source of the program's funding. Because Texas had no federal lands, it did not become a Reclamation state until 1906, when Congress passed a law including it in the provisions of the Reclamation Act.

The Resettlement Administration (RA) was a New Deal U.S. federal agency created May 1, 1935. It relocated struggling urban and rural families to communities planned by the federal government. On September 1, 1937, it was succeeded by the Farm Security Administration.