Federal Bureaus

Departments are cabinet-level organizations led by Secretaries (e.g., Department of Justice) that report directly to the President. Bureaus are subordinate units within departments that carry out specific functions (e.g., FBI within DOJ). Departments have broader policy authority; bureaus implement departmental policy for specific mission areas.

More than 50 major federal bureaus operate across the 15 executive departments. This includes well-known bureaus like the FBI, IRS, and Census Bureau, as well as specialized bureaus managing specific functions. The exact number fluctuates as bureaus are created, reorganized, or consolidated.

The Federal Bureau of Investigation is the primary federal law enforcement and intelligence agency. It investigates federal crimes including terrorism, cybercrime, organized crime, white-collar crime, and civil rights violations. It has jurisdiction over 200+ federal crimes. The FBI maintains 56 field offices across the U.S. and approximately 60 international offices. It also operates intelligence collection and analysis operations.

The BLM manages the largest federal land holdings in the United States: 245 million acres (about one-tenth of U.S. land) plus 700 million acres of subsurface mineral estate. It manages these lands for multiple uses including outdoor recreation, livestock grazing, energy development, and conservation. The BLM employs ~10,000 and operates field offices in 12 western states and Alaska.

The Census Bureau is the nation's leading statistical agency. It conducts the decennial census every 10 years to determine population and allocate House of Representatives seats by state. It conducts 130+ surveys on demographics and economics. Census data informs distribution of $675+ billion in federal funding annually and supports policy decisions affecting millions of Americans.

The Internal Revenue Service employs approximately 70,000 people nationwide. The IRS processes ~150 million individual tax returns annually and administers federal tax law. Despite its large workforce, the IRS has faced budget constraints affecting customer service and enforcement activities.

The Bureau of Indian Affairs (BIA) implements federal policy for 574 federally recognized tribes serving 2.5 million American Indian and Alaska Natives. It manages 55.7 million acres held in trust for tribes. Services include law enforcement, justice administration, education, healthcare, housing, natural resource management, and economic development on tribal lands.

The Bureau of Reclamation operates 300+ storage reservoirs and 58 hydroelectric power plants in 17 western states. Major dams include Hoover Dam (Colorado River, Nevada-Arizona border), Glen Canyon Dam (Arizona), Grand Coulee Dam (Washington, world's largest concrete structure), Shasta Dam (California), and Parker Dam (California-Arizona). These projects provide water and power to millions.

The U.S. Secret Service has two missions: Protection and Investigation. It protects the President, Vice President, their families, former presidents, designated dignitaries, and major events of national significance. It investigates financial crimes including counterfeiting, credit card fraud, cybercrime, and banking fraud. Transferred from Treasury to Homeland Security in 2003.

Among federal bureaus, the largest employers include: U.S. Customs and Border Protection (CBP) with 60,000+ personnel, Postal Inspection Service with ~40,000, IRS with ~70,000, TSA with ~50,000, Social Security Administration, and Veterans Benefits Administration. Combined with military personnel, the federal government employs over 2.2 million civilian and military workers.