Woodbridge is a census-designated place and magisterial district of Prince William County, Virginia, United States, located 20 miles (32 km) south of Washington, D.C.. Bounded by the Occoquan and Potomac rivers, Woodbridge Magisterial District had 54,275 residents at the 2010 census. The Woodbridge census-designated place comprises just one portion of the magisterial district and had a population of 4,055 in the 2010 census. The census-designated place consists solely of the section north of Occoquan Road and Dawson Beach Road, and east of Interstate 95.