The U.S. federal government is built to serve the people, protect the nation, and support global stability. Though complex, its structure ensures that power is balanced, responsibilities are clear, and services reach every corner of society. Cabinet departments drive national priorities, while independent agencies deliver specialized expertise. Because organizational inventories differ by source and purpose, counts of “agencies” vary across official references. Regardless of structure, these entities collectively safeguard the well-being, security, prosperity and international interests of the American people. From ensuring clean water to defending national security, the government operates through three main branches and hundreds of specialized agencies.

For detailed information about the organization of the government and the various agency missions, visit the links below.