Old Colchester Road used to be a road leading to the seaport of Colchester, Virginia, which was on the banks of the Occoquan River near the Potomac River. Silt filled up the Occoquan River, making Colchester untenable as a seaport. Alexandria, Virginia became the major seaport in the area, taking the place of Colchester. The result was that Old Colchester Road became a minor road, and much later was incorporated into SR 611 (Fairfax County).
