Herndon is a town in Fairfax County, Virginia, in the Washington, D.C. metropolitan area of the United States. Herndon was named for Commander William Lewis Herndon, American naval explorer and author of Exploration of the Valley of the Amazon. Originally part of the rural surroundings of the Washington, D.C. area, the town of Herndon developed into a hub of dairy farming and vacationing for area residents, aided by its presence along the Alexandria, Loudoun and Hampshire Railroad.When the railroad was converted into a hike-and-bike trail, Herndon capitalized on history and small-town feel by converting its train station into a museum and visitors center and by relocating a Norfolk Southern Railway caboose to a nearby site and repainting it in W&OD livery. The Herndon Historic District is listed on the National Register of Historic Places.
Herndon is part of the Dulles Technology Corridor, which Fortune magazine named the “Netplex” because of the presence of the headquarters of such companies as AOL, XO Communications, Verizon Business (formerly MCI, formerly WorldCom, originally UUNET), and Network Solutions, which began as the INTERNIC – the registry where every domain name was once administered. Some of those companies are within Herndon. Others have Herndon mailing addresses, but are located in unincorporated Fairfax or Loudoun counties; for example, south of the Dulles Toll Road. These include Deltek and K12. Herndon is within the Fairfax County Public Schools district.