John King (died 30 March 1621) was a Church of England clergyman and bishop of London from 1611–1621.

John King was educated at Westminster School and Christ Church, Oxford. A chaplain to bishop John Piers, King became preacher to the city of York before becoming domestic chaplain to Thomas Egerton in London. As Rector of St Andrews, Holborn in 1597 and prebend of Sneating in St Paul's in 1599, King became a well-known Calvinist anti-Catholic preacher. Appointed a chaplain in ordinary to James I, James then made John King dean of Christ Church in August 1605. He was Vice-Chancellor of Oxford University from 1607 until 1610. He was consecrated Bishop of London on 8 September 1611.

King married Joan Freeman; their eldest son was the poet and bishop of Chichester Henry King.