The following is an image from current topographic maps of the area in which the Oak Hill Plantation is located. The site is to the west of State Route 15, near the town of Aldie, just north of Gilbert's Corner and State Route 50, and 9 miles south of Leesburg, in Loudoun County.
The next image is of Loudoun County and the surrounding region, from an 1895 Rand McNally map in the University of Virginia's collections. Oak Hill's proximity to the Potomac River and Washington, D.C. can be seen from this image.