John Boyle, 5th Earl of Cork and of Orrery (13 January 1707 - 16 November 1762), was a writer and a friend of Jonathan Swift, Alexander Pope and Samuel Johnson.

The only son of Charles Boyle, 4th Earl of Orrery, he was born at Westminster and attended Christ Church, Oxford. He published a translation of the letters of Pliny the Younger in 1751, and Remarks on the Life and Writings of Jonathan Swift in the same year, and the Memoirs of Robert Carey, Earl of Monmouth . His Letters from Italy was published in 1774 by J. Duncombe .

He was was married twice, and succeeded as Earl of Cork by his son Hamilton , who died in 1764 and passed the earldom to John's next son, Edmund .