List of federal agencies in the United States

The federal government of the United States includes many agencies, departments, offices and other organizations. The official United States Government Manual and the Administrative Procedure Act list government agencies. The Administrative Procedure Act's definition of agency applies to most executive branch agencies, while the United States Congress may define an agency however it chooses in enabling legislation, and through subsequent litigation often involving the Freedom of Information Act and the Government in the Sunshine Act.

The executive branch of the federal government includes the Executive Office of the President and the United States federal executive departments, whose secretaries belong to the Cabinet of the United States. Employees of the majority of these agencies are considered civil servants.

The majority of the independent agencies of the United States government are also classified as executive agencies. They are independent in that they are not subordinated under a Cabinet position. There is a smaller number of independent agencies that are not part of the executive branch, such as the Congressional Research Service and the United States Sentencing Commission, which are legislative and judicial agencies, respectively.