Barwick, John an English clergyman, was born at Wetherslack, in Westmoreland, where he resided at the commencement of the civil war. Suspected by the Puritans, he left Cambridge and went to London, where he lived as chaplain to bishop Morton at Ely House. After the execution of king Charles, Barwick engaged with the same zeal in the affairs of Charles II; on which account he was arrested and sent to the Tower, where he was confined for two years, and released Aug. 7, 1652. After the declaration of Monk in favor of the king, Barwick was sent to lay before his majesty the state of ecclesiastical affairs, and was appointed his chaplain. He was afterwards appointed to a stall at Durham, and to the livings of Workingham and Houghton-le-Spring, and in 1660 became dean of Durham, which office he very shortly after resigned for the deanery of St. Paul's and rectory of Therfield, Herts. He died in 1664. His Life of Thomas Morton, Bishop of Durham, and his sermon preached at St. Paul's in 1661, entitled Deceivers Deceived, are his best-known works. His Life, originally written in Latin by his brother Peter, was printed in English (Lon. 1724).