Executive Branch

• White House Office

Executive Agencies

• Department of Agriculture
• Department of Commerce
• Department of Defense
• Department of Education
• Department of Energy
• Department of Health and Human Services
  • Administration on Aging
  • Administration for Children and Families
  • Centers for Disease Control and Prevention (CDC)
  • Food and Drug Administration (FDA)
  • National Institutes of Health (NIH)
• Department of Housing and Urban Development (HUD)
• Department of the Interior
  • National Park Service (ParkNet)
  • U.S. Fish and Wildlife Service
  • Bureau of Indian Affairs (BIA)
  • Bureau of Land Management (BLM)
  • Bureau of Ocean Management
  • U.S. Geological Survey (USGS)
• Department of Justice (DOJ)
  • Drug Enforcement Administration (DEA)
  • Federal Bureau of Investigation (FBI)
  • Citizenship and Naturalization Service (INS)
• Department of Labor (DOL)
  • Occupational Safety and Health Administration (OSHA)
• Department of State
• Department of Transportation
  • Federal Aviation Administration (FAA)
  • Federal Highway Administration
• Department of the Treasury
  • Internal Revenue Service (IRS)
  • U.S. Secret Service
  • U.S. Mint
  • Bureau of Engraving and Printing
• Department of Veterans Affairs

Judicial Branch

• Administrative Office of the U.S. Courts
• Federal Judicial Center
• U.S. Federal Courts Locator

Legislative Branch

• U.S. House of Representatives
  • House of Representatives Finder
• U.S. Senate
  • U. S. Senators Finder
• Government Printing Office (GPO)
• Library of Congress

Independent Establishments Government Corporations

• Commission on Civil Rights
• Consumer Product Safety Commission (CPSC)
• Environmental Protection Agency (EPA)
• Farm Credit Administration
• Federal Communications Commission (FCC)
• Federal Deposit Insurance Corporation (FDIC)
• Federal Emergency Management Agency (FEMA)
• General Services Administration (GSA)
• National Aeronautics and Space Administration (NASA)
• National Archives and Records Administration (NARA)
• National Science Foundation (NSF)
• Peace Corps
• Selective Service System
• Small Business Administration (SBA)
• Social Security Administration (SSA)
• U.S. Chemical Safety and Hazard Investigation
• U.S. Postal Service (USPS)

Boards, Commissions, and Committees

• Advisory Council on Historic Preservation
• Armed Forces Retirement Home
• FedStats
• National Council on Disability
• National Park Foundation
• U.S. Holocaust Memorial Museum

Quasi-Official Agencies

• Smithsonian Institution
• U.S. Institute of Peace