He was the younger brother of Thomas King (died 1725), soldier and MP.
[1] He matriculated at Christ Church, Oxford on 4 July 1678, receiving his B.A.
From the mid-1690s, he was Preacher at the Charterhouse School, and, upon the death of Thomas Burnet in 1715, King was made Master of Charterhouse.
A devout man who carried a copy of Thomas à Kempis's Imitation of Christ with him everywhere, King had a formative influence on John Wesley, who was a gownboy at the Charterhouse School 1714–1720.
King was made Archdeacon of Colchester in 1722, and a Canon of Bristol in 1728.