John Warren (12 May 1730 – 27 January 1800) was Bishop of St David's 1779–1783, and Bishop of Bangor from 1783 until his death. Warren was born at Cavendish, Suffolk, the son of , the Archdeacon of Suffolk. He was educated in Bury St Edmunds and at Gonville and Caius College, Cambridge, graduating BA in 1751.