Sir John Carew, 3rd Baronet (6 November 1635 – 1 August 1692) of Antony, Cornwall, was an English politician who sat in the House of Commons variously between 1660 and 1692.
Carew was the son and heir of Sir Alexander Carew, 2nd Baronet (1608–1644) by his wife Jane Rolle (d.1679) daughter of Robert Rolle (d.1633) of Heanton Satchville, Petrockstowe, Devon. His father was beheaded on Tower Hill on 23 December 1644 for attempting to betray the Parliamentary cause during the English Civil War.
Carew succeeded to the baronetcy in 1644 and although the estates were initially sequestered they were later released and he was allowed to inherit in November 1645.
In 1660 Carew was elected Member of Parliament for Cornwall in the Convention Parliament. In 1661 he was elected MP for Bodmin for the Cavalier Parliament and sat until 1679. He was then elected MP for Lostwithiel until 1685. In 1689 he was re-elected MP for Cornwall until 1690 when he was elected MP for Saltash. He sat until his death at the age of 56 in 1692.
Carew married thrice: