The Roman Catholic Diocese of Valleyfield () is a Catholic diocese in Quebec and a suffragan of the Archdiocese of Montreal. It was erected in 1892.
The diocese, which is based in the western suburbs of Montreal, features approximately 201,000 baptized Catholics. Parishioners are served by 48 priests, 17 deacons, 31 religious brothers, and 76 religious sisters. In 2008, the diocese consolidated its 63 parishes into 24.
Bishops Ordinaries
Joseph-Médard Émard (1892–1922), appointed Archbishop of Ottawa Felix-Raymond-Marie Rouleau, O.P. (1923–1926), appointed Archbishop of Québec (elevated to Cardinal in 1927) Joseph Alfred Langlois (1926–1966) Percival Caza (1966–1969) Guy Bélanger (1969–1975) Robert Lebel (1976–2000) Luc Cyr (2001–2011), appointed Archbishop of Sherbrooke, Québec Noël Simard (2011–2024) Alain Faubert (2024–present)
Coadjutor bishop Percival Caza (1955–1966)
Auxiliary bishop Percival Caza (1948–1955), appointed Coadjutor here
Other priests of this diocese who became bishop Bernard Hubert, appointed Bishop of Saint-Jérôme, Québec in 1971 Paul-Émile Léger, appointed Archbishop of Montreal, Québec in 1950
Other priest of this diocese who became cardinal
Paul-Émile Léger, appointed Cardinal in 1953
References