John Carmel Heenan (26 January 1905 – 7 November 1975) was a senior-ranking English prelate of the Catholic Church.

He auditioned for Westminster Cathedral Choir School at age 9, but Sir Richard Terry rejected him for his "metallic voice".

He then did pastoral work in Brentwood until 1947, at which time he became Superior of the Catholic Missionary Society of England and Wales.

[4] He also condemned the periti, or theological experts, who sought to change the church's doctrine on birth control.

A compilation of their letters, A Bitter Trial: Evelyn Waugh and John Carmel Cardinal Heenan on the Liturgical Changes, was first published in 1996 and reprinted in an expanded edition in 2011.