John Carew (3 July 1622 - 15 October 1660) was a member of the landed gentry from Antony, Cornwall and MP for Tregony from 1647 to 1653. A prominent supporter of the Fifth Monarchists, a millenarianist religious sect, he backed Parliament and the Commonwealth in the Wars of the Three Kingdoms and approved the Execution of Charles I in January 1649. He held various administrative positions during the Interregnum, including membership of the English Council of State, but was deprived of office and jailed in 1655 for his opposition to The Protectorate.