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 1688-9 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.
He was the second son of John Kettlewell, a merchant at Northallerton, Yorkshire, by his wife, Elizabeth Ogle, was born 10 March 1653, and was educated at Northallerton Grammar School under Thomas Smelt, a royalist, whose other pupils included George Hickes, William Palliser, Thomas Burnet, Thomas Rymer, and John Radcliffe. Kettlewell matriculated at St Edmund Hall, Oxford on 11 November 1670, and graduated B.A. 20 June 1674. On Radcliffe's resignation of a fellowship at Lincoln College, Oxford, Kettlewell was elected in his place in July 1675, with the backing of George Hickes, then himself a Fellow. For about five years he acted as tutor in college, and proceeded M.A. 3 May 1677.
He was ordained deacon by John Fell in Christ Church Cathedral 10 June 1677, and priest 24 February 1678. The reputation which his first book made for him led to his appointment as chaplain to Anne, Countess of Bedford, and to his presentation by Simon Digby, 4th Baron Digby to the vicarage of Coleshill, Warwickshire (December 1682). He resigned his fellowship at Lincoln College on 22 November 1683, devoted himself to his parish, where he preached the high church doctrine of passive obedience. In 1685 Kettlewell married.