Most Rev. John T McNally: First Bishop of Calgary, 1913 – 1924.
Later Bishop of Hamilton and Archbishop of Halifax.
Most Rev. John T Kidd: Second Bishop of Calgary, 1925 – 1931.
The former rector of St. Augustine's Seminary. Later Bishop of London.
Most Rev. Peter J Monahan: Third Bishop of Calgary. 1932 – 1935.
Later Bishop of Regina.
Most Rev. Francis P. Carroll: Fourth Bishop of Calgary. 1935 – 1967.
Former rector of St. Augustine's Seminary.
Most Rev. Francis J. Klein: Fifth Bishop of Calgary. 1967 – Early 1968.
Most Rev. Paul J. O'Byrne: Sixth Bishop of Calgary. 1968 - 1998.
Most Rev. Frederick B. Henry: Seventh Bishop of Calgary. 1998-2017.