Truro Parish was the ecclesiastical jurisdiction of the Anglican church in colonial Virginia with jurisdiction originally over all of Fairfax County. The parish had its central church at the Truro Church and the parish was named for the parish in Truro in Cornwall. The parish was created on November 1, 1732 from . It was divided twice: in 1748, Cameron Parish was formed and in 1764 Fairfax Parish was created. After 1765, Truro Parish covered southern Fairfax County until disestablishment ended the parish system by 1786.