Dulles, Virginia is an unincorporated area located in Loudoun County, Virginia, part of the Washington metropolitan area. The headquarters of Orbital Sciences Corporation, GeoEye, and ODIN technologies and the former headquarters of MCI Inc. and AOL are located in Dulles. Dulles covers roughly the southwestern third of Sterling, Virginia (another unincorporated community). The usage of Dulles as a community name began in the mid-1980s when Loudoun County economic development officer Pam Treadwell successfully lobbied the United States Postal Service to allow Sterling businesses and residents to use Dulles as an alternate address.
Washington Dulles International Airport is located partially in Dulles (although its postal address uses the Sterling name instead) and partially in Fairfax County. The community derives its name from the airport; the airport in turn takes its name from former United States Secretary of State John Foster Dulles (1888–1959).
Orbital Sciences Corporation has its headquarters in Dulles. AOL had its headquarters at 22000 AOL Way in Dulles. In 2007 AOL announced that it would move its headquarters from Loudoun County to New York City; it would continue to operate its Virginia offices. Before its dissolution, FLYi, Inc./Independence Air (originally Atlantic Coast Airlines) was headquartered in Dulles. Prior to its dissolution, MAXjet Airways was headquartered on the grounds of Washington-Dulles International Airport and in Dulles. Other companies have offices in Dulles, e.g., Harris IT Services, a wholly owned subsidiary of Harris Corporation.