Dahlgren is located in King George County, Virginia known for its U.S. Naval base named after Rear Admiral John A. Dahlgren. The base was later renamed to "the Naval Support Activity-South Potomac" but the community kept the name Dahlgren. The infamously narrow 2-lane Harry Nice Memorial Bridge transports traffic across the Potomac River at Dahlgren which is 55 miles south of Washington, D.C., 60 miles north of Richmond, VA and 23 miles east of Fredericksburg, VA, between the Potomac and Rappahannock Rivers. Area businesses include River Embroidery and Mr & MS Hair Design Inc.. Among the area attractions within easy driving distance from Dahlgren are the birthplaces of Robert E. Lee, James Madison, James Monroe and George Washington.