(1628–27 July 1680), Puritan divine, was an English Puritan Presbyterian clergyman born at the St Katherine Cree parish of London.
Charnock studied at Emmanuel College, Cambridge, during which he was converted to the Christian faith, beginning his spiritual journey as a Puritan divine. After leaving the college, he possibly held a position as either a private teacher or tutor, then moving on to become a minister of the faith in Southwark for a short time, converting individuals to Christianity. He continued on to New College, Oxford, where he earned a fellowship and gained a position as senior proctor
He moved to Ireland in 1656 where he became a chaplain to Henry Cromwell, governor of Ireland. In Dublin, he began a regular ministry of preaching to other believers. Those who came to hear him were from different classes of society and differing denominations, and he became widely known for the skill by which he discharged his duties.