The Diocese of Calgary (Latin: Diœcesis Calgariensis) is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Alberta, Canada.

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.

Airdrie Banff Beiseker Blairmore (Crowsnest Pass) Bow Island Brocket Brooks Canmore Carstairs Chestermere Claresholm

Cluny Coaldale Cochrane Drumheller Fort Macleod Hanna High River Lethbridge Medicine Hat

Milk River Okotoks Oyen Picture Butte Pincher Creek Rockyford Siksika Nation Standoff Strathmore Taber Vauxhall