The Roman Catholic Archdiocese of Montréal (Latin: Archdioecesis Marianopolitana) is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church in Canada.

The cathedral of the Archdiocese of Montréal is the Cathedral Basilica of Mary, Queen of the World and St. James the Greater (Basilique cathédrale de Marie-Reine-du-Monde et de Saint-Jacques-le-Majeur), built in 1894.

As per 2014, it pastorally served 1,724,357 Catholics (72.3% of 2,386,038 total) on 947 km² in 170 parishes and 35 missions with 901 priests (377 diocesan, 524 religious), 87 deacons, 3,817 lay religious (741 brothers, 3,076 sisters) and 16 seminarians.

The Metropolitan Archbishop of Montréal's province has as suffragan sees: Below is a list of individuals who have led the Archdiocese of Montreal and its antecedent jurisdictions since its founding.

[4][5][6] All coadjutor ordinaries except for John Charles Prince and Joseph La Rocque eventually succeeded to become head of the Archdiocese of Montreal or its antecedent jurisdictions.