John Custis (August 1678–after 14 November 1749) was a member of the Governor's Council in the British Colony of Virginia. Often he is designated as John Custis IV or John Custis of Williamsburg to distinguish him from his grandfather, father, and other relatives of the same name. His parents were John Custis (ca. 1654–1714) (usually designated John Custis III or John Custis of Wilsonia), who was also a Council member, and Margaret Michael Custis.