John Thomas McNally (1913.04.04 – 1924.08.12); later Bishop of Hamilton (Ontario, Canada) (1924.08.12 – 1937.02.17), Metropolitan Archbishop of Halifax (Canada) (1937.02.17 – death 1952.11.18)
John Thomas Kidd (1925.02.06 – 1931.07.03), next Bishop of London (Ontario, Canada) (1931.07.03 – death 1950.06.02)
Peter Joseph Monahan (1932.06.10 – 1935.06.26), next Metropolitan Archbishop of Regina (Canada) (1935.06.26 – death 1947.05.06)
Auxiliary bishopJoseph Lawrence Wilhelm (1963.06.25 – 1966.12.14), Titular Bishop of Saccæa (1963.06.25 – 1966.12.14); later Metropolitan Archbishop of Kingston (Canada) (1966.12.14 – retired 1982.03.12); died 1995
Francis Joseph Klein (1967.02.25 – death 1968.02.03); previously Bishop of Saskatoon (Canada) (1952.02.28 – 1967.02.25)
Frederick Henry (1998.01.19 – retired 2017.01.04), previously Titular Bishop of Carinola (1986.04.18 – 1995.03.24) as Auxiliary Bishop of London (Canada) (1986.04.18 – 1995.03.24), Bishop of Thunder Bay (Canada) (1995.03.24 – 1998.01.19)
William McGrattan (4 January 2017 – ...); previously Titular Bishop of Furnos minor (2009.11.06 – 2014.04.08) as Auxiliary Bishop of Toronto (Canada) (2009.11.06 – 2014.04.08), Bishop of Peterborough (Canada) (2014.04.08 – 2017.01.04).
As per 2014 it pastorally served 538,000 Catholics (45.5% of 1,183,000 total) on 110,500 km² in 69 parishes with 158 priests (123 diocesan, 35 religious), 50 deacons, 166 lay religious (46 brothers, 120 sisters) and 10 seminarians.[3]
The diocese contains 82+ parishes and missions specifically: 37 parishes in Calgary alone; of which, 10 are ethnic parishes, an additional university parish to serve the University of Calgary and 45+ parishes and missions designated for southern Alberta and the Rockies lower region. On December 3, 2017 Bishop McGrattan announced his intention to make Our Lady of the Rockies Parish in Canmore into a Diocesan Marian Shrine in the spring of 2019.[4]
In 2006: 87 diocesan priests, 38 religious priests
427,200 Catholics.
110 women religious, 48 religious brothers and 30 permanent deacons make up the spiritual work force in Calgary not including the other regions.