John Hacket (Born Halket) (1 September 1592 – 28 October 1670) was an English churchman, Bishop of Lichfield and Coventry from 1661 until his death.

[1] On taking his degree he was elected a fellow of his college, and soon afterwards wrote the comedy, Loiola (London, 1648), which was twice performed before King James I.

He was ordained in 1618, and through the influence of John Williams became rector in 1621 of Stoke Hammond, Buckinghamshire, and Kirkby Underwood, Lincolnshire.

When the so-called Root and Branch Bill was before Parliament in 1641, Hacket was selected to plead in the House of Commons for the continuance of cathedral establishments.

On the accession of Charles II, his fortunes improved; he frequently preached before the king, and was elected Bishop of Lichfield and Coventry after the bishopric was rejected by the Presbyterian leader Edmund Calamy the elder.