Roman Catholic Diocese of Kamloops Tags: Clerical Administrative Region, Diocese.The Roman Catholic Diocese of Kamloops (Latin: Dioecesis Kamloopsensis) (erected 22 December 1945) is a suffragan of the Archdiocese of Vancouver. The Diocese of Kamloops is led by Bishop David John James Monroe. thumbnail area (km2) 1.19e+11 Established December 22 1945 patron Immaculate Heart of Mary, John Vianney province Metropolitan bishop Learn more... Loading...