Executive Agencies
Agencies created by Congress assigned to oversee specific areas of top-level responsibility. 

• Department of Agriculture (USDA)
  • Farm Service Agency
  • Foreign Agricultural Service
  • Food, Nutrition, and Consumer Services
  • Food Safety and Inspection Service
  • Gateway to Government Food Safety Information
  • Marketing and Regulatory Programs
  • Animal and Plant Health Inspection Service
  • Forest Service
  • Agricultural Research Service (ARS)
  • National Agricultural Library
  • Plant Genome Information Resource (PGDIC)
  • National Agricultural Statistics Service
  • Rural Development
  • Rural Housing Service
  • Rural Utilities Service
  • Office of the Chief Economist

• Department of Commerce (DoC)
  • National Oceanic and Atmospheric Administration (NOAA)
  • National Marine Fisheries Service (NMFS)
  • National Weather Service (NWS)
  • Patent and Trademark Office
  • National Institute of Standards and Technology
  • FedWorld Information Network

• Department of Defense (DoD)
  • Office of the Secretary of Defense
  • Joint Chiefs of Staff (JCSLink)
  • Coast Guard (in time of war)
  • Department of the Air Force
  • Department of the Army
  • Department of the Navy
  • United States Marine Corps
  • National War College
  • National Guard
  • Defense Intelligence Agency (DIA)
  • National Security Agency
  • U.S. European Command, Stuttgart-Vaihingen, Germany
  • U.S. Pacific Command, Honolulu, HI
  • U.S. Atlantic Command, Norfolk, VA
  • U.S. Southern Command, Miami, FL
  • U.S. Central Command, MacDill Air Force Base, FL
  • U.S. Space Command, Peterson Air Force Base, CO
  • U.S. Special Operations Command, MacDill Air Force Base, FL
  • U.S. Transportation Command, Scott Air Force Base, IL
  • U.S. Strategic Command, Offutt Air Force Base, NE

• Department of Education
  • National Center for Education Statistics (NCES)
  • Office for Civil Rights
  • National Institute on Postsecondary Education, Libraries, and Lifelong Learning (PLLI)
  • Office of Elementary and Secondary Education (OESE)
  • Office of Special Education and Rehabilitative Service

• Department of Energy
  • Federal Energy Regulatory Commission (FERC)
  • Office of Fissile Materials Disposition
  • Energy Efficiency and Renewable Energy Network (EE)
  • Energy Information Administration (EIA)
  • Office of Environmental Management (EM)
  • Office of Environment, Safety and Health (EH)
  • Federal Energy Management Program
  • Office of Fossil Energy
  • Fusion Energy Sciences Program
  • Argonne National Laboratory (ANL)
  • Brookhaven National Laboratory
  • Ernest Orlando Lawrence Berkeley National Laboratory (LBNL)
  • Fermi National Accelerator Laboratory (Fermilab)
  • Lawrence Livermore National Laboratory (LLNL)
  • Los Alamos National Laboratory (LANL)
  • Oak Ridge National Laboratories
  • Sandia National Laboratories
  • Stanford Linear Accelerator Center (SLAC)
  • Strategic Petroleum Reserve

• Department of Health and Human Services (HHS)
  • Administration on Aging
  • Administration for Children and Families
  • Health Care Financing Administration
  • Health Resources and Services Administration
  • Public Health Service (PHS)
  • Agency for Toxic Substances and Disease Registry
  • Centers for Disease Control and Prevention (CDC)
  • National Vaccine Program Office
  • Office of Health and Safety (OhASIS)
  • Office of Women's Health
  • Epidemiology Program Office
  • National Center for Chronic Disease Prevention and Health Promotion
  • National Center for Environmental Health
  • Office of Genetics and Disease Prevention
  • National Center for Health Statistics
  • National Center for HIV, STD, and TB Prevention
  • National Center for Infectious Diseases
  • National Center for Injury Prevention and Control
  • National Immunization Program
  • National Institute for Occupational Safety and Health
  • Food and Drug Administration (FDA)
  • Indian Health Service (IHS)
  • National Institutes of Health (NIH)
  • National Cancer Institute (NCI)
  • National Human Genome Research Institute (NHGRI)
  • National Center for Research Resources (NCRR)
  • National Institute of Mental Health (NIMH)
  • National Library of Medicine (NLM)

• Department of Housing and Urban Development (HUD)

• Department of the Interior (DOI)

• Department of Justice (DOJ)

• Department of Labor (DOL)

• Department of State (DOS)

• Department of Transportation (DOT)
  • Coast Guard

• Department of the Treasury

• Department of Veterans Affairs

Independent Agencies and Government Corporations
Created by Congress to deal with areas outside of the scope of normal legislation, the agencies and corporations take care of much of the day-to-day business of government.

• Advisory Council on Historic Preservation
• African Development Foundation
• Amtrak
• Broadcasting Board of Governors
• Central Intelligence Agency (CIA)
• Commission on Civil Rights
• Commodity Futures Trading Commission (CFTC)
• Consumer Product Safety Commission (CPSC)
• Corporation for National and Community Service
• Defense Nuclear Facilities Safety Board (DNFSB)
• Environmental Protection Agency (EPA)
• Equal Employment Opportunity Commission (EEOC)
• Export-Import Bank of the United States
• Farm Credit Administration
• Federal Communications Commission (FCC)
• Federal Deposit Insurance Corporation (FDIC)
• Federal Election Commission (FEC)
• Federal Emergency Management Agency (FEMA)
• Federal Housing Finance Board
• Federal Labor Relations Authority
• Federal Office of Child Support Enforcement
• Federal Maritime Commission
• Federal Mediation and Conciliation Service
• Federal Mine Safety and Health Review Commission
• Federal Reserve System
• Federal Retirement Thrift Investment Board
• Federal Trade Commission (FTC)
• General Services Administration (GSA)
• Inter-American Foundation
• International Broadcasting Bureau (IBB)
• Merit Systems Protection Board
• National Aeronautics and Space Administration (NASA)
• National Archives and Records Administration (NARA)
• National Capital Planning Commission
• National Credit Union Administration (NCUA)
• National Endowment for the Arts
• National Endowment for the Humanities
• National Labor Relations Board (NLRB)
• National Mediation Board
• National Railroad Passenger Corporation (AMTRAK)
• National Science Foundation (NSF)
• National Transportation Safety Board
• Nuclear Regulatory Commission (NRC)
• Occupational Safety and Health Review Commission
• Office of Government Ethics
• Office of Personnel Management
• Office of Special Counsel (OSC)
• Overseas Private Investment Corporation
• Panama Canal Commission
• Peace Corps
• Pension Benefit Guaranty Corporation
• Postal Rate Commission
• Railroad Retirement Board
• Securities and Exchange Commission (SEC)
• Selective Service System
• Small Business Administration (SBA)
• Social Security Administration (SSA)
• Tennessee Valley Authority
• Trade and Development Agency
• United States Chemical Safety and Hazard Investigation Board
• United States Commission on Civil Rights
• United States Agency for International Development
• United States International Information Program
• United States International Trade Commission (USITC)
• United States Postal Service (USPS)
  • USPS Postage Rates

Commissions, Boards and Councils

• Accounting and Auditing Policy Committee (AAPC)
• Administrative Committee of the Federal Register
• Advisory Commission on Intergovernmental Relations
• American Battle Monuments Commission
• Appalachian Regional Commission
• Architectural and Transportation Barriers Compliance Board (Access Board)
• Arctic Research Commission
• Armed Forces Retirement Home
• Arthritis and Musculoskeletal Interagency Coordinating Committee
• Barry M. Goldwater Scholarship and Excellence in Education Foundation
• Chemical Safety and Hazard Investigation Board
• Chief Financial Officers Council
• Chief Information Officers Council
• Commission of Fine Arts
• Committee for the Implementation of Textile Agreements
• Committee for Purchase from People Who Are Blind or Severely Disabled
• Coordinating Council on Juvenile Justice and Delinquency Prevention
• Critical Infrastructure Assurance Office (CIAO)
• Delaware River Basin Commission
• Endangered Species Committee
• Federal Accounting Standards Advisory Board (FASAB)
• Federal Credit Policy Working Group (FCPWG)
• Federal Financial Institutions Examination Council
• Federal Financial Managers Council (FFMC)
• Federal Executive Board
• Federal Financing Bank
• Federal Interagency Committee on Education
• Federal Interagency Committee for the Management of Noxious and Exotic Weeds
• Federal Interagency Council on Statistical Policy
• Federal Laboratory Consortium for Technology Transfer
• Federal Library and Information Center Committee
• Harry S. Truman Scholarship Foundation
• Illinois and Michigan Canal National Heritage Corridor Commission
• Indian Arts and Crafts Board
• Interagency Commission on Crime and Security in U.S. Seaports
• Interagency Committee on Employment of People with Disabilities
• Inter-Agency Electronic Grants Committee (IAEGC)
• Interagency Alternative Dispute Resolution Working Group (IADRWG)
• J. William Fulbright Foreign Scholarship Board
• James Madison Memorial Fellowship Foundation
• Japan-United States Friendship Commission
• Marine Mammal Commission
• Medicare Payment Advisory Commission (MedPAC)
• Migratory Bird Conservation Commission
• Mississippi River Parkway Commission
• Morris K. Udall Scholarship and Excellence in National Environmental Policy Foundation
• National Bioethics Advisory Commission
• National Bipartisan Commission on the Future of Medicare
• National Commission on Libraries and Information Science
• National Communications System
• National Council on Disability
• National Gambling Impact Study Commission
• National Occupational Information Coordinating Committee
• National Park Foundation
• Northwest Power Planning Council
• Office of Navajo and Hopi Indian Relocation
• President's Commission on the Celebration of Women in American History
• President's Committee on Employment of People with Disabilities
• President's Council on Integrity and Efficiency
• President's Foreign Intelligence Advisory Board
• Presidio Trust
• Regulatory Information Service Center
• Small Agency Council (SAC)
• Social Security Advisory Board
• Susquehanna River Basin Commission
• Trade Policy Staff Committee
• United States Holocaust Memorial Museum
• United States Nuclear Waste Technical Review Board
• Veterans Day National Committee
• White House Commission on Presidential Scholarships

Quasi-Governmental Agencies
Not official agencies of the Executive Branch, but required by law to inform Congress of their activities. Their reports are published in the Federal Register.

• Amtrak
• Legal Services Corporation
• Smithsonian Institution
• State Justice Institute
• United States Institute of Peace