Fairfax County's economy revolves around professional services and technology.
Many residents work for the government or for contractors of the federal government.
The government is the largest employer, with Fort Belvoir in southern Fairfax being the county's single largest location 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, CSC (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.
Northrop Grumman announced in 2010 that it would move its corporate headquarters from Los Angeles to Fairfax County.

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.
Fairfax County's economy revolves around professional services and technology. Many residents work for the government or for contractors of the federal government. The government is the largest employer, with Fort Belvoir in southern Fairfax being the county's single largest location 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, CSC (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. Northrop Grumman announced in 2010 that it would move its corporate headquarters from Los Angeles to Fairfax County.
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.
Fairfax County, Virginia