Pentagon City is an unincorporated neighborhood (also called an "urban village") located in the southeast portion of Arlington County, Virginia, near The Pentagon and Arlington National Cemetery. Due to its proximity to Washington, D.C., this community of residential, office, and retail complexes is a major tourist stop.Pentagon City is less than a mile from the Potomac River, which separates the Commonwealth of Virginia from Washington, D.C. It is located on the Blue and Yellow Lines of the Washington Metro, and the Pentagon City Metro station is one of the busiest in the metrorail system during peak and off-peak hours.