- WELCOME TO FAIRFAX COUNTY, VIRGINIA Fairfax County is a world-class business location and the heart of the northern Virginia and Washington, D.C., area technology community. Our dynamic companies, well-educated and highly skilled residents, excellent school system and cultural amenities make Fairfax County one of the most desirable places to live and work in the United States. The Latest News ...www.fairfaxcountyeda.org