John Kettlewell (10 March 1653 – 12 April 1695) was an English clergyman, nonjuror and devotional writer. He is now known for his arguments against William Sherlock, who had justified the change of monarch of 1688–89 and his own switch of sides in The Case of the Allegiance. According to J. P. Kenyon, Kettlewell's reply made a case "with which conformist Anglicans could only agree, because it was spiritual, while Sherlock's was resolutely aspiritual". He went on to attack defenders of the Glorious Revolution generally as proponents of fallacious contractarian theories.