where is fort belvoir located
Fort Belvoir is located in Fairfax County in Northern Virginia approximately 20 miles South of Washington, D.C. The base operatorâs phone number is 703-545-6700. Fort Belvoirâs history is interwoven with the birth of our nation, as well as the founding of Fairfax County, Virginia. Like most land in colonial America, the 8,656-acre tract along the Potomac River that is now Fort Belvoir was part of a grant from a 17th-century English king.