Fairfax County, officially the County of Fairfax, is a county in the Commonwealth of Virginia. It is part of Northern Virginia and borders both the city of Alexandria and Arlington County and forms part of the suburban ring of Washington, D.C. The county is predominantly suburban in character with some urban and rural pockets.

The county is home to the headquarters of several intelligence agencies such as the Central Intelligence Agency, National Geospatial-Intelligence Agency, National Reconnaissance Office, National Counterterrorism Center, and Office of the Director of National Intelligence as well as the headquarters of several aerospace manufacturing and defense industry giants. The county is also home to the flagship campus of George Mason University, and headquarters to seven Fortune 500 companies, including three in the Falls Church area, though not in the independent municipality of Falls Church.

According to the U.S. Census Bureau, the county has an area of 406 square miles (1,050 km2), of which 391 square miles (1,010 km2) is land and 15 square miles (39 km2) (3.8%) is water.

Fairfax County is bounded on the north and southeast by the Potomac River. Across the river to the northeast is Washington, D.C., across the river to the north is Montgomery County, Maryland, and across the river to the southeast are Prince George’s County, Maryland and Charles County, Maryland. The county is partially bounded on the north and east by Arlington County and the independent cities of Alexandria and Falls Church. It is bounded on the west by Loudoun County, and on the south by Prince William County.

Most of the county lies in the Piedmont region, with rolling hills and deep stream valleys such as Difficult Run and its tributaries. West of Route 28, the hills give way to a flat, gentle valley that stretches west to the Bull Run Mountains in Loudoun County. Elevations in the county range from near sea level along the tidal sections of the Potomac River in the southeast portion of the county to more than 500 feet (150 m) in the Tysons Corner area.

Adjacent jurisdictions

  • Arlington County – east
  • Charles County, Maryland – southeast
  • City of Alexandria – east
  • City of Fairfax – surrounded by Fairfax County
  • City of Falls Church – east
  • Loudoun County – northwest
  • Montgomery County, Maryland – north
  • Prince George’s County, Maryland – east
  • Prince William County – southwest

The Piedmont hills in the central county are made up of ancient metamorphic rocks such as schist, the roots of several ancestral ranges of the Appalachians. The western valley is floored with more recent shale and sandstone. This geology is similar to adjacent bands of rocks in Maryland and further south in Virginia along the eastern front of the Appalachians.

An area of 11 square miles (30 km2) of the county is known to be underlain with natural asbestos. Much of the asbestos is known to emanate from fibrous tremolite or actinolite. The threat was discovered in 1987, prompting the county to establish laws to monitor air quality at construction sites, control soil taken from affected areas, and require freshly developed sites to lay 6 inches (150 mm) of clean, stable material over the ground.

For instance, during the construction of Centreville High School a large amount of asbestos-laden soil was removed and then trucked to Vienna for the construction of the I-66/Nutley Street interchange. Fill dirt then had to be trucked in to make the site level. Marine clays can be found in widespread areas of the county east of Interstate 95, mostly in the Lee and Mount Vernon districts. These clays contribute to soil instability, leading to significant construction challenges for builders.

Fairfax County’s economy revolves around professional services and technology. Many residents work for the government or contractors of the federal government. The government is the largest employer, with Fort Belvoir in southern Fairfax the county’s single largest source of federal employment. Fairfax County has a gross county product of about $95 billion.

Fairfax County also is home to major employers such as Volkswagen Group of America, Hilton Worldwide, DXC Technology (formerly Computer Sciences Corporation), Northrop Grumman, Science Applications International Corporation (SAIC), Leidos, Booz Allen Hamilton, Gannett, Capital One, General Dynamics, ICF International, Freddie Mac, Sallie Mae, ManTech International, Mars, NII and NVR. The county is home to seven Fortune 500 company headquarters, 11 Hispanic 500 companies, and five companies on the Black Enterprise 500 list.

The county’s economy is supported by the Fairfax County Economic Development Authority, which provides services and information to promote Fairfax County as a leading business and technology center. The FCEDA is the nation’s largest non-state economic development authority. Fairfax County is also home to the Northern Virginia Technology Council, a trade association for local technology companies. It is the nation’s largest technology council, with technology industry figures such as Bill Gates and Meg Whitman speaking at various local banquets. Fairfax County has a higher concentration of high-tech workers than Silicon Valley.

Tysons

The Tysons CDP of Fairfax County is Virginia’s largest office market and the nation’s largest suburban business district, with 26,600,000 square feet (2,470,000 m2) of office space. It is the country’s 12th-largest business district and is expected to grow substantially in the coming decades. It contains a quarter of the county’s total office space inventory, which was 105,200,000 square feet (9,770,000 m2) at year-end 2006, about the size of Lower Manhattan. Forbes wrote that the area is “often described as the place where the Internet was invented, but today it looks increasingly like the center of the global military-industrial complex”, because it is home to the nation’s first ISPs (many now defunct) and attracts numerous defense contractors that have relocated from other states to or near Tysons Corner.

Every weekday, Tysons draws over 100,000 workers from around the region. It also draws 55,000 shoppers every weekday, as it is home to neighboring super-regional malls Tysons Corner Center and Tysons Galleria. In comparison, Washington, D.C., draws 15 million visitors annually, or the equivalent of 62,500 per weekday.

After years of stalling and controversy, the $5.2 billion expansion of the Washington Metro Silver Line in Virginia from Washington, D.C., to Dulles International Airport was funded by the Federal Transit Administration in December 2008. The Silver Line added four stations in Tysons, including a station between Tysons Corner Center and Tysons Galleria.

Along with the expansion of Washington Metro, Fairfax County government has a plan to “urbanize” the Tysons area. The plan calls for a private-public partnership and a grid-like street system to make Tysons a more urban environment, tripling available housing to allow more workers to live near their workplaces. The goal is to have 95% of Tysons Corner within 1⁄2-mile (800 m) of a metro station.

Employment

Fairfax County’s average weekly wage during the first quarter of 2005 was $1,181, 52% more than the national average. By comparison, the average weekly wage was $1,286 for Arlington—the Washington metropolitan area’s highest—$1,277 for Washington, D.C., and $775 for the U.S. as a whole. The types of jobs available in the area make it very attractive to highly educated workers. The relatively high wages may be partially due to the area’s high cost of living.

In early 2005, Fairfax County had 553,107 total jobs, up from 372,792 in 1990. In the area, this is second to Washington’s 658,505 jobs in 2005 (down from 668,532 in 1990).

As of the 2002 Economic Census, Fairfax County has the largest professional, scientific, and technical service sector in the Washington, D.C., area—in terms of the number of business establishments; total sales, shipments, and receipts; payrolls; and number of employees—exceeding the next-largest, Washington, D.C., by roughly a quarter overall, and double that of neighboring Montgomery County.

The headquarters of the Central Intelligence Agency (CIA) are in Langley, on Fairfax County’s northeastern border.

Annual festivals include the “Celebrate Fairfax!” festival held in June at the Fairfax County Government Center in Fairfax City, the Northern Virginia Fine Arts Festival held in May at the Reston Town Center in Reston, and the International Children’s Festival held in September at the Wolf Trap National Park for the Performing Arts, which features a performing arts center outside Vienna.

Fairfax County supports a summer concert series held in multiple venues throughout the county on various nights. The concert series are called Arts in the Parks, Braddock Nights, Lee District Nights, Mt. Vernon Nights, Nottoway Nights, Spotlight by Starlight, Sounds of Summer and Starlight Cinema.

EagleBank Arena (originally the Patriot Center), on the Fairfax campus of George Mason University just outside the City of Fairfax, hosts concerts and shows. The nearby Center for the Arts at George Mason is a major year-round arts venue, and the Workhouse Arts Center in Lorton, Virginia includes studios for artists, event facilities for performing groups, and gallery exhibitions in addition to hosting the annual Clifton Film Festival. Smaller local art venues include:

  • Alden Theater at the McLean Community Center
  • ArtSpace Herndon
  • Center Stage at the Reston Community Center
  • Greater Reston Arts Center
  • James Lee Community Center Theater
  • Vienna Arts Society

The county has many protected areas, a total of over 390 county parks on more than 23,000 acres (93 km2). The Fairfax County Park Authority maintains parks and recreation centers through the county. There are also two national protected areas that are inside the county at least in part, including the Elizabeth Hartwell Mason Neck National Wildlife Refuge, the George Washington Memorial Parkway, and Wolf Trap National Park for the Performing Arts. The Mason Neck State Park is also in Lorton.

Fairfax County is a member of the Northern Virginia Regional Park Authority.

The Reston Zoo is in Reston, Virginia. The National Zoo is nearby in Washington, D.C.

Trails

The county maintains many miles of bike trails running through parks, adjacent to roads and through towns such as Vienna and Herndon. The Washington & Old Dominion Railroad Trail runs through Fairfax County, offering one of the region’s best, and safest, routes for recreational walking and biking. In addition, nine miles (14 km) of the Mount Vernon Trail runs through Fairfax County along the Potomac River.

Compared to other regions of the Washington area, Fairfax County has a dearth of designated bike lanes for cyclists wishing to commute in the region. On May 16, 2008, Bike-to-Work Day, the Fairfax County Department of Transportation released the first countywide bicycle route map.

The Fairfax Cross County Trail runs from Great Falls National Park in the county’s northern end to Occoquan Regional Park in the southern end. Consisting of mostly dirt paths and short asphalt sections, the trail is used mostly by recreational mountain bikers, hikers, and horse riders.

Three incorporated towns, Clifton, Herndon, and Vienna, are entirely within Fairfax County.

The independent cities of Falls Church and Fairfax were formed out of areas formerly under Fairfax County’s jurisdiction, but are politically separate. Nevertheless, the Postal Service has long considered several portions of Fairfax County to be unincorporated Falls Church and Fairfax City. Several portions of the county also have Alexandria mailing addresses; many locals refer to these neighborhoods collectively as “South Alexandria”, “Lower Alexandria”, or “Alexandria, Fairfax County”. “South Alexandria” communities include Hollin Hills, Franconia, Groveton, Hybla Valley, Huntington, Belle Haven, Mount Vernon, Fort Hunt, Engleside, Burgundy Village, Waynewood, Wilton Woods, Rose Hill, Virginia Hills, Hayfield, and Kingstowne.

It has been proposed to convert the entire county into a single independent city, primarily to gain more control over taxes and roads. The most recent such proposal was made on June 30, 2009.

Other communities in Fairfax County are unincorporated areas. Virginia law dictates that no unincorporated area of a county may be incorporated as a separate town or city following the adoption of the urban county executive form of government. Fairfax County adopted the urban county executive form of government in 1966.

As of the 2000 census, Fairfax County’s 13 largest communities are all unincorporated CDPs, the largest of which are Centreville, Reston, and McLean, each with a population over 45,000. (The largest incorporated place in the county is Herndon, its 14th-largest community.)

Nearby Communities