The following Federal Agencies are headquartered in Northern Virginia. Agencies with approximately 10,000+ employees, or a $10 billion+ budget are in bold.

Agency (common abbreviation)	City/CDP (Area)	Seal/Insignia/Crest
Defense Contract Management Agency	Alexandria
National Credit Union Administration	Alexandria
Office of the Inspector General, U.S. Department of Defense	Alexandria
Office of Local Defense Community Cooperation, formerly the Office of Economic Adjustment (OEA) (OLDCC)	Alexandria
United States Patent and Trademark Office (PTO)	Alexandria
Food and Nutrition Service (FNS)	Alexandria
National Science Foundation (NSF)	Alexandria
Foreign Service Institute	Arlington (Arlington Hall)
Air Force Office of Scientific Research (AFOSR)	Arlington (Ballston)
Air Force Office of Special Investigations (AFOSI)	Triangle (Quantico)
Defense Advanced Research Projects Agency (DARPA)	Arlington (Ballston)
Defense POW/MIA Accounting Agency (DPAA)	Arlington (The Pentagon)
Defense Security Cooperation Agency (DSCA)	Arlington (The Pentagon)
Cybersecurity and Infrastructure Security Agency (CISA)	Arlington (Ballston)
Office of Naval Research (ONR)	Arlington (Ballston)
National Cybersecurity & Communications Integration Center	Arlington (Bluemont)
Nuclear Waste Technical Review Board	Arlington (Courthouse)
US Marshals Service (USMS)	Arlington (Crystal City)
Special Inspector General for Afghanistan Reconstruction (SIGAR)	Arlington (Crystal City)
Warrior Transition Command	Arlington (Crystal City)
Mine Safety and Health Administration (MSHA)	Arlington (Crystal City)
Army National Guard Readiness Center	Arlington (Arlington Hall)
Joint Improvised Explosive Device Defeat Organization	Arlington (The Pentagon)
United States Air Force (USAF)	Arlington (The Pentagon)
United States Army (USA)	Arlington (The Pentagon)
United States Marine Corps (USMC)	Arlington (The Pentagon)
United States Navy (USN)	Arlington (The Pentagon)
Department of Defense (DOD)	Arlington (The Pentagon)
Department of the Air Force	Arlington (The Pentagon)
Department of the Army	Arlington (The Pentagon)
Department of the Navy	Arlington (The Pentagon)
Missile Defense Agency (MDA)	Fort Belvoir
National Guard Bureau (NGB)	Arlington (The Pentagon)
National Security Space Office	Arlington (The Pentagon)
National Technical Information Service (NTIS)	Alexandria
Pentagon Force Protection Agency (PFPA)	Arlington (The Pentagon)
Transportation Security Administration (TSA)	Arlington (Pentagon City)
Drug Enforcement Administration (DEA)	Arlington (Pentagon City)
Bureau of Conflict and Stabilization Operations (CSO)	Arlington (Rosslyn)
Bureau of Diplomatic Security	Arlington (Rosslyn)
Bureau of Overseas Buildings Operations	Arlington (Rosslyn)
United States Trade and Development Agency	Arlington (Rosslyn)
Federal Deposit Insurance Corporation (FDIC)	Arlington (Virginia Square)
United States Fish & Wildlife Service	Bailey's Crossroads
National Reconnaissance Office (NRO)	Chantilly
National Reconnaissance Operations Center	Chantilly
Defense Health Agency (DHA)	Falls Church
Defense Contract Audit Agency (DCAA)	Fort Belvoir
Defense Logistics Agency (DLA)	Fort Belvoir
Defense Counterintelligence and Security Agency (DCSA)	Triangle (Quantico)
Defense Human Resources Activity (DHRA)	Alexandria
Defense Technology Security Administration (DTSA)	Alexandria
Defense Threat Reduction Agency (DTRA)	Fort Belvoir
Department of Defense Education Activity (DODEA)	Alexandria
National Geospatial-Intelligence Agency (NGA)	Fort Belvoir
United States Army Intelligence and Security Command (INSCOM)	Fort Belvoir
Washington Headquarters Services (WHS)	Arlington (The Pentagon)
Central Intelligence Agency (CIA)	McLean (Langley)
Farm Credit Administration	McLean (Tysons Corner)
National Counterterrorism Center (NCTC)	McLean (Tysons Corner)
Office of the Director of National Intelligence (ODNI)	McLean (Tysons Corner)
United States Geological Survey (USGS)	Reston
Bureau of Indian Affairs Division of Acquisitions	Reston