Round Hill is an unincorporated community in Loudoun County, Virginia, United States. Round Hill is located west of Winchester on the Northwestern Turnpike. It is often referred to as Round Hill after Round Hill (1381 ft) but this may cause confusion as there is already an incorporated town with the same name in nearby Loudoun County. Round Hill has also been known as Chambersville throughout its history. It lies on Round Hill Road, off U.S. Route 50 at Poorhouse Road.