Cameron Parish was the ecclesiastical jurisdiction of the Anglican church in colonial Virginia with jurisdiction over the western part of Fairfax County and, once it was created in 1757, over Loudoun County. The parish was named for the minor title of Thomas, Lord Fairfax, Baron of Cameron. The parish was created in 1748 from Truro Parish. It was divided in 1770 and Shelburne Parish was formed from the western half of Loudoun County. After 1770, Cameron Parish covered eastern Loudoun County until disestablishment ended the parish system by 1786.