Oak Hill Historic District is a national historic district at Hagerstown, Washington County, Maryland, United States. The district consists of a residential neighborhood of approximately 76 acre in northern Hagerstown. It is characterized generally by large scale houses built in the first third of the 20th century and standing in a garden city type setting. The houses are generally Colonial or Georgian revival in stylistic influences. It was added to the National Register of Historic Places in 1987.