John Rainolds (or Reynolds) (1549 – 21 May 1607) was an English academic and churchman, of Puritan views. He is remembered for his role in the Authorized Version of the Bible, a project of which he was initiator.
He was born about Michaelmas 1549 at Pinhoe, near Exeter. He was fifth son of Richard Rainolds; William Rainolds was his brother. His uncle Thomas Rainolds held the living of Pinhoe from 1530 to 1537, and was subsequently Warden of Merton College, Oxford, and Dean of Exeter. John Rainolds appears to have entered the University of Oxford originally at Merton, but on 29 April 1563 he was elected to a scholarship at Corpus Christi College, where two of his brothers, Hierome and Edmond, were already fellows. He became probationary fellow on 11 October 1566, and full fellow two years subsequently. On 15 October 1568 he graduated B.A.; and about this time he was assigned as tutor to Richard Hooker. In 1566 he played the female role of Hippolyta in a performance of the play Palamon and Arcite at Oxford, as part of an elaborate entertainment for the queen. She rewarded him with 8 gold angels. Rainolds later recalled this youthful role with embarrassment, as he came to support Puritan objections to the theatre, being particularly critical of cross-dressing roles.
In 1572–73 Rainolds was appointed reader in Greek, and his lectures on Aristotle's Rhetoric made his reputation. In 1576 he objected to the proposal that Antonio de Corro should be allowed to proceed Doctor of Divinity; and at the same time he was instrumental in having Francesco Pucci expelled from the university, Pucci being an associate and ally of Corro, who had moved against orthodox Calvinist positions.