Antoine de Montazet (17 August 1713, Laugnac – 2 May 1788) was a French theologian, of Jansenist tendencies, who became bishop of Autun and archbishop of Lyon.
Contrary to the papal bull of Pope Pius V on the Roman Breviary, Montazet changed the text of the Breviary and the Missal.
The later efforts of Pope Pius IX and Cardinal Bonald to suppress the innovations of Montazet provoked resistance on the part of the canons, who defended the traditional Lyonnese ceremonies.