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Fairfax County, Virginia

Fairfax County, Virginia
County
County of Fairfax
borded
The Fairfax County Courthouse at Fairfax in 2010.
Flag of Fairfax County, Virginia
Flag
Seal of Fairfax County, Virginia
Seal
Logo of Fairfax County, Virginia
Logo
Nickname(s): "Fairfax"
Map of Virginia highlighting Fairfax County
Location in the U.S. state of Virginia
Map of the United States highlighting Virginia
Virginia's location in the U.S.
Founded June 19, 1742
Named for Thomas Fairfax, 6th Lord Fairfax of Cameron
Seat Fairfax1
Largest town Herndon
Area
 • Total 406 sq mi (1,052 km2)
 • Land 391 sq mi (1,013 km2)
 • Water 15 sq mi (39 km2), 3.8%
Population (est.)
 • (2015) 1,142,234
 • Density 2,813/sq mi (1,086/km²)
Congressional districts 8th, 10th, 11th
Time zone Eastern: UTC-5/-4
Website www.fairfaxcounty.gov
Footnotes: 1 Administrative and court offices are located in unincorporated areas in Fairfax County

Fairfax County, officially the County of Fairfax, is a county in the Commonwealth of Virginia.

As of the 2010 census, the population was 1,081,726, in 2015, it was estimated at 1,142,234, making it the Commonwealth's most populous jurisdiction, with 13.6% of Virginia's population. The county is also the most populous jurisdiction in the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area, with 19.8% of the MSA population, as well as the larger Washington-Baltimore-Arlington, DC-MD-VA-WV-PA Combined Statistical Area, with 13.1% of the CSA population. The county seat is the City of Fairfax, though because it is an independent city under Virginia law, the city of Fairfax is not part of Fairfax County.

Fairfax was the first U.S. county to reach a six-figure median household income and has the second-highest median household income of any local jurisdiction in the United States after neighbor Loudoun County.

The county is home to the headquarters of intelligence agencies such as the Central Intelligence Agency, National Geospatial-Intelligence Agency, and National Reconnaissance Office, as well as the National Counterterrorism Center and Office of the Director of National Intelligence. The county is also home to seven Fortune 500 companies, including three with Falls Church addresses.


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