John Chardon (also Charden, Charldon and Charlton) (died 1601) was an Englishman who became the Church of Ireland bishop of Down and Connor from 1596 to 1601.
He was elected probationer on 3 March 1565, and after some wildness, on 24 October 1566 was admitted full and perpetual scholar after he had publicly sworn obedience to the statutes.
In 1571 he was a schoolmaster at Worksop, Nottinghamshire, holding possibly at the same time the post of chaplain to Sir Gervase Clifton (d. 1581).
He was a noted preacher, upholding the reformed doctrine, and at the same time defending the order of the Church of England.
The Casket of Jewels[1] from 1571 is a work of moral philosophy, a translation of the Brevis et perspicua totius ethicae seu de moribus philosophiae descriptio (1566) of the humanist Cornelius Valerius (1512–1578).