Changes in Ecclesiastical Jurisdictions
in Canada
Changes in Ecclesiastical Jurisdictionsin Canada | |
Date | Change |
| 1658.04.11 | Apostolic Vicariate of Nouvelle-France was established (from Metropolitan Archdiocese of Rouen) |
| 1674.10.01 | Apostolic Vicariate of Nouvelle-France was promoted as Diocese of Québec |
| 1688.01.30 | Diocese of Québec lost territory to Apostolic Vicariate of London District |
| 1784.05.30 | Apostolic Prefecture of Newfoundland was established (from Diocese of Québec) |
| 1784.05.30 | Diocese of Québec lost territory to Diocese of Santiago |
| 1796.01.05 | Apostolic Prefecture of Newfoundland was promoted as Apostolic Vicariate of Newfoundland |
| 1817.07.04 | Apostolic Vicariate of Nova Scotia was established (from Diocese of Québec) |
| 1819.01.12 | Diocese of Québec was promoted as Archdiocese of Québec (lost territory to establish Apostolic Vicariate of Upper Canada) |
| 1819.01.12 | Apostolic Vicariate of Upper Canada was established (from Diocese of Québec) |
| 1820.02.01 | Archdiocese of Québec lost territory to Apostolic Vicariate of Newfoundland |
| 1826.01.27 | Apostolic Vicariate of Upper Canada was promoted as Diocese of Kingston |
| 1829.08.11 | Diocese of Charlottetown was established (from Archdiocese of Québec) |
| 1829.09.04 | Archdiocese of Québec lost territory to Apostolic Vicariate of Nova Scotia |
| 1836.05.13 | Diocese of Montréal was established (from Archdiocese of Québec) |
| 1841.12.17 | Diocese of Toronto was established (from Diocese of Kingston) |
| 1842.02.15 | Apostolic Vicariate of Nova Scotia was promoted as Diocese of Halifax |
| 1842.09.30 | Diocese of Saint John in America was established (from Diocese of Charlottetown) |
| 1844.04.16 | Apostolic Vicariate of North West was established (from Archdiocese of Québec) |
| 1844.07.12 | Archdiocese of Québec was promoted as Metropolitan Archdiocese of Québec (with suffragan sees Charlottetown, Halifax, Kingston, Montréal, Saint John in America and Toronto) |
| 1844.09.22 | Diocese of Arichat was established (from Diocese of Halifax and became suffragan of Québec) |
| 1846.07.24 | Diocese of Vancouver Island was established (from Apostolic Vicariate of Oregon and became suffragan of Oregon City) |
| 1847.06.04 | Apostolic Vicariate of Newfoundland was promoted as Diocese of Newfoundland (became suffragan of Québec) |
| 1847.06.04 | Apostolic Vicariate of North West was promoted as Diocese of North West (became suffragan of Québec) |
| 1847.06.25 | Diocese of Bytown was established (from Diocese of Kingston and became suffragan of Québec) |
| 1851 | Diocese of North West was renamed as Diocese of Saint-Boniface |
| 1852.05.04 | Diocese of Halifax was promoted as Metropolitan Archdiocese of Halifax (with suffragan sees Arichat, Charlottetown, Newfoundland and Saint John in America) |
| 1852.06.08 | Diocese of Saint-Hyacinthe was established (from Metropolitan Archdiocese of Québec and Diocese of Montréal and became suffragan of Québec) |
| 1852.06.08 | Diocese of Trois-Rivières was established (from Metropolitan Archdiocese of Québec and became suffragan of Québec) |
| 1855.02.21 | Diocese of London was established (from Diocese of Toronto and became suffragan of Québec) |
| 1855.12.08 | Apostolic Prefecture of North Pole was established (from Metropolitan Archdiocese of Québec, Diocese of Saint-Boniface, Apostolic Vicariate of Nordic Missions and Apostolic Vicariate of Sweden) |
| 1856.02.29 | Diocese of Hamilton was established (from Diocese of Toronto and became suffragan of Québec) |
| 1856.02.29 | Diocese of Harbour Grace was established (from Diocese of Newfoundland and without ecclesiastical province) |
| 1856.02.29 | Diocese of Newfoundland was renamed as Diocese of Saint John’s, Newfoundland (lost territory to establish Diocese of Harbour Grace) |
| 1859.02.02 | Diocese of London was renamed as Diocese of Sandwich |
| 1860.05.08 | Diocese of Chatham was established (from Diocese of Saint John in America and became suffragan of Halifax) |
| 1860.06.14 | Diocese of Bytown was renamed as Diocese of Ottawa |
| 1862.04.08 | Apostolic Vicariate of Athabaska Mackenzie was established (from Diocese of Saint-Boniface and became suffragan of Québec) |
| 1863.12.14 | Apostolic Vicariate of British Columbia was established (from Diocese of Vancouver Island and became suffragan of Québec) |
| 1866.03.20 | Apostolic Prefecture of North Pole was renamed as Apostolic Prefecture of North Pole |
| 1867.01.15 | Diocese of Saint-Germain de Rimouski was established (from Metropolitan Archdiocese of Québec and became suffragan of Québec) |
| 1869.08.17 | Apostolic Prefecture of North Pole was suppressed (to Diocese of Saint-Boniface, Diocese of Saint-Germain de Rimouski, Apostolic Vicariate of Athabaska Mackenzie, Apostolic Vicariate of Northern District of Scotland, Apostolic Vicariate of Sweden and Apostolic Prefecture of Denmark) |
| 1869.11.15 | Diocese of Sandwich was renamed as Diocese of London |
| 1870 | Diocese of Saint John in America lost territory to Diocese of Portland in Maine |
| 1870.03.18 | Diocese of Toronto was promoted as Metropolitan Archdiocese of Toronto (with suffragan sees Hamilton, Kingston and London) |
| 1870.09.16 | Apostolic Prefecture of Placentia was established (from Diocese of Harbour Grace and Diocese of Saint John’s, Newfoundland and became suffragan of Halifax) |
| 1870.09.16 | Apostolic Prefecture of Western Newfoundland was established (from Diocese of Saint John’s, Newfoundland and became suffragan of Halifax) |
| 1871.09.22 | Diocese of Saint Albert was established (from Diocese of Saint-Boniface and became suffragan of Saint-Boniface) |
| 1871.09.22 | Diocese of Saint-Boniface was promoted as Metropolitan Archdiocese of Saint-Boniface (with suffragan sees Saint Albert and Athabaska Mackenzie and lost territory to establish Diocese of Saint Albert) |
| 1874.01.25 | Apostolic Vicariate of Northern Canada was established (from Diocese of Kingston and became suffragan of Toronto) |
| 1874.08.28 | Diocese of Sherbrooke was established (from Metropolitan Archdiocese of Québec, Diocese of Saint-Hyacinthe and Diocese of Trois-Rivières and became suffragan of Québec) |
| 1878.05.28 | Diocese of Chicoutimi was established (from Metropolitan Archdiocese of Québec and became suffragan of Québec) |
| 1882.05.29 | Apostolic Prefecture of Golfe Saint-Laurent was established (from Diocese of Saint-Germain de Rimouski and became suffragan of Québec) |
| 1882.07.11 | Diocese of Kingston lost territory to Diocese of Peterborough |
| 1882.07.11 | Apostolic Vicariate of Northern Canada was promoted as Diocese of Peterborough (gained territory from Metropolitan Archdiocese of Toronto and Diocese of Kingston) |
| 1882.07.11 | Apostolic Vicariate of Pontiac was established (from Metropolitan Archdiocese of Saint-Boniface, Diocese of Ottawa and Diocese of Trois-Rivières and became suffragan of Québec) |
| 1882.07.11 | Metropolitan Archdiocese of Toronto lost territory to Diocese of Peterborough |
| 1885.07.10 | Diocese of Nicolet was established (from Diocese of Trois-Rivières and became suffragan of Québec) |
| 1886.06.08 | Diocese of Montréal was promoted as Metropolitan Archdiocese of Montréal (with suffragan sees Saint-Hyacinthe and Sherbrooke) |
| 1886.06.08 | Diocese of Ottawa was promoted as Metropolitan Archdiocese of Ottawa (with suffragan see Pontiac) |
| 1886.08.23 | Diocese of Arichat was renamed as Diocese of Antigonish |
| 1889 | Diocese of Saint Albert lost territory to Metropolitan Archdiocese of Saint-Boniface |
| 1889.12.28 | Diocese of Kingston was promoted as Metropolitan Archdiocese of Kingston (with suffragan see Peterborough) |
| 1890.01.21 | Diocese of Alexandria in America was established (from Metropolitan Archdiocese of Kingston and became suffragan of Kingston) |
| 1890.09.02 | Apostolic Vicariate of British Columbia was promoted as Diocese of New Westminster (became suffragan of Saint-Boniface) |
| 1891.06.04 | Apostolic Vicariate of Saskatchewan was established (from Metropolitan Archdiocese of Saint-Boniface and became suffragan of Saint-Boniface) |
| 1892.04.05 | Diocese of Valleyfield was established (from Metropolitan Archdiocese of Montréal and became suffragan of Montréal) |
| 1892.04.28 | Apostolic Prefecture of Placentia was suppressed (to Diocese of Saint John’s, Newfoundland and Apostolic Vicariate of Western Newfoundland) |
| 1892.04.28 | Apostolic Prefecture of Western Newfoundland was promoted as Apostolic Vicariate of Western Newfoundland (gained territory from the suppressed Apostolic Prefecture of Placentia) |
| 1894 | Diocese of Vancouver Island lost territory to Metropolitan Archdiocese of Oregon City |
| 1898.05.04 | Apostolic Vicariate of Pontiac was promoted as Diocese of Pembroke |
| 1901.07.03 | Apostolic Vicariate of Athabaska Mackenzie was renamed as Apostolic Vicariate of Athabaska (lost territory to establish Apostolic Vicariate of Mackenzie) |
| 1901.07.03 | Apostolic Vicariate of Mackenzie was established (from Apostolic Vicariate of Athabaska Mackenzie and became suffragan of Saint-Boniface) |
| 1903.06.19 | Diocese of Vancouver Island was promoted as Metropolitan Archdiocese of Vancouver Island (with suffragan sees New Westminster and Mackenzie) |
| 1904.01.27 | Diocese of Joliette was established (from Metropolitan Archdiocese of Montréal and became suffragan of Montréal) |
| 1904.02.08 | Diocese of Saint John’s, Newfoundland was promoted as Metropolitan Archdiocese of Saint John’s, Newfoundland (with suffragan sees Harbour Grace and Western Newfoundland) |
| 1904.02.18 | Apostolic Vicariate of Western Newfoundland was promoted as Diocese of Saint George’s |
| 1904.09.06 | Metropolitan Archdiocese of Vancouver Island was renamed as Metropolitan Archdiocese of Victoria |
| 1904.09.16 | Diocese of Sault Sainte Marie was established (from Diocese of Peterborough and became suffragan of Kingston) |
| 1905.09.12 | Apostolic Prefecture of Golfe Saint-Laurent was promoted as Apostolic Vicariate of Golfe Saint-Laurent |
| 1907.12.02 | Apostolic Vicariate of Saskatchewan was promoted as Diocese of Prince Albert |
| 1908.03.09 | Apostolic Prefecture of Yukon was established (from Apostolic Vicariate of Mackenzie and became suffragan of Saint-Boniface) |
| 1908.09.19 | Diocese of New Westminster was promoted as Metropolitan Archdiocese of Vancouver (with suffragan sees Victoria and Mackenzie) |
| 1908.09.19 | Metropolitan Archdiocese of Victoria was demoted as Diocese of Victoria (became suffragan of Vancouver) |
| 1908.09.21 | Apostolic Vicariate of Temiskaming was established (from Diocese of Pembroke and became suffragan of Ottawa) |
| 1910.03.04 | Apostolic Vicariate of Keewatin was established (from Diocese of Prince Albert and became suffragan of Saint-Boniface) |
| 1910.03.04 | Diocese of Regina was established (from Metropolitan Archdiocese of Saint-Boniface and became suffragan of Saint-Boniface) |
| 1910.11.15 | Diocese of Alexandria in America was renamed as Diocese of Alexandria in Ontario |
| 1912.06.15 | Apostolic Exarchate of Canada (Ukrainian Rite) was established |
| 1912.11.30 | Diocese of Calgary was established (from Diocese of Saint Albert and became suffragan of Edmonton) |
| 1912.11.30 | Diocese of Saint Albert was promoted as Metropolitan Archdiocese of Edmonton (with suffragan see Calgary and lost territory to establish Diocese of Calgary) |
| 1913.04.21 | Diocese of Mont-Laurier was established (from Metropolitan Archdiocese of Ottawa and became suffragan of Ottawa) |
| 1915.12.04 | Diocese of Regina was promoted as Metropolitan Archdiocese of Regina (with suffragan see Prince Albert) |
| 1915.12.04 | Archdiocese of Winnipeg was established (from Metropolitan Archdiocese of Saint-Boniface and without ecclesiastical province) |
| 1916.01.07 | Apostolic Vicariate of Temiskaming was promoted as Diocese of Haileybury |
| 1916.11.20 | Metropolitan Archdiocese of Vancouver lost territory to Apostolic Vicariate of Yukon–Prince Rupert |
| 1916.11.20 | Apostolic Prefecture of Yukon was promoted as Apostolic Vicariate of Yukon–Prince Rupert (gained territory from Metropolitan Archdiocese of Vancouver) |
| 1919.04.18 | Apostolic Prefecture of Northern Ontario was established (from Diocese of Haileybury and became suffragan of Ottawa) |
| 1920.11.17 | Apostolic Prefecture of Northern Ontario was promoted as Apostolic Vicariate of Northern Ontario |
| 1921.04.30 | Diocese of Prince Albert was renamed as Diocese of Prince Albert–Saskatoon |
| 1921.05.06 | Territorial Abbacy of Saint Peter–Muenster was established (from Diocese of Prince Albert–Saskatoon and became suffragan of Regina) |
| 1922.05.05 | Diocese of Gaspé was established (from Diocese of Saint-Germain de Rimouski and became suffragan of Québec) |
| 1924.11.15 | Diocese of Saint John in America was renamed as Diocese of Saint John, New Brunswick |
| 1925.07.15 | Apostolic Prefecture of Baie d’Hudson was established (from Apostolic Vicariate of Keewatin and became suffragan of Saint-Boniface) |
| 1927.03.15 | Apostolic Vicariate of Athabaska was renamed as Apostolic Vicariate of Grouard (exchanged territory with Apostolic Vicariate of Mackenzie) |
| 1927.03.15 | Apostolic Vicariate of Mackenzie exchanged territory with Apostolic Vicariate of Athabaska |
| 1930.01.31 | Diocese of Gravelbourg was established (from Metropolitan Archdiocese of Regina and became suffragan of Regina) |
| 1931.12.21 | Apostolic Prefecture of Baie d’Hudson was promoted as Apostolic Vicariate of Baie d’Hudson |
| 1933.06.09 | Apostolic Vicariate of Keewatin lost territory to Diocese of Prince Albert |
| 1933.06.09 | Diocese of Prince Albert–Saskatoon was renamed as Diocese of Prince Albert (gained territory from Apostolic Vicariate of Keewatin and lost territory to establish Diocese of Saskatoon) |
| 1933.06.09 | Diocese of Saint-Jean-de-Québec was established (from Metropolitan Archdiocese of Montréal and became suffragan of Montréal) |
| 1933.06.09 | Diocese of Saskatoon was established (from Diocese of Prince Albert–Saskatoon and became suffragan of Regina) |
| 1936.02.22 | Metropolitan Archdiocese of Moncton was established (from Diocese of Chatham and Diocese of Saint John, New Brunswick and with suffragan sees Chatham and Saint John, New Brunswick) |
| 1936.02.22 | Diocese of Nelson was established (from Metropolitan Archdiocese of Vancouver and became suffragan of Vancouver) |
| 1938.03.13 | Diocese of Chatham was renamed as Diocese of Bathurst |
| 1938.12.03 | Diocese of Amos was established (from Diocese of Haileybury and became suffragan of Québec) |
| 1938.12.03 | Apostolic Vicariate of Baie de James was established (from Diocese of Haileybury and Apostolic Vicariate of Northern Ontario and became suffragan of Ottawa) |
| 1938.12.03 | Apostolic Vicariate of Northern Ontario was promoted as Diocese of Hearst (lost territory to establish Apostolic Vicariate of Baie de James) |
| 1938.12.10 | Diocese of Haileybury was renamed as Diocese of Timmins |
| 1940.01.13 | Apostolic Vicariate of Keewatin lost territory to Apostolic Vicariate of Baie d’Hudson |
| 1944.01.14 | Apostolic Vicariate of Yukon–Prince Rupert was renamed as Apostolic Vicariate of Prince Rupert (lost territory to establish Apostolic Vicariate of Whitehorse) |
| 1944.01.14 | Apostolic Vicariate of Whitehorse was established (from Apostolic Vicariate of Grouard and Apostolic Vicariate of Yukon–Prince Rupert and became suffragan of Saint-Boniface) |
| 1944.12.16 | Diocese of Edmundston was established (from Diocese of Bathurst and became suffragan of Moncton) |
| 1945.07.13 | Apostolic Vicariate of Labrador was established (from Diocese of Harbour Grace, Apostolic Vicariate of Baie d’Hudson and Apostolic Vicariate of Golfe Saint-Laurent and became suffragan of Saint John’s, Newfoundland) |
| 1945.11.24 | Diocese of Chicoutimi lost territory to Diocese of Golfe Saint-Laurent |
| 1945.11.24 | Apostolic Vicariate of Golfe Saint-Laurent was promoted as Diocese of Golfe Saint-Laurent (gained territory from Diocese of Chicoutimi) |
| 1945.12.22 | Diocese of Kamloops was established (from Metropolitan Archdiocese of Vancouver and became suffragan of Vancouver) |
| 1946 | Diocese of Charlottetown lost territory to Diocese of Gaspé |
| 1946.02.09 | Diocese of Saint-Germain de Rimouski was promoted as Metropolitan Archdiocese of Rimouski (with suffragan sees Gaspé and Golfe Saint-Laurent) |
| 1948.01.19 | Apostolic Exarchate of Canada (Ukrainian Rite) was renamed as Apostolic Exarchate of Central Canada (lost territory to establish Apostolic Exarchate of Eastern Canada and Apostolic Exarchate of Western Canada) |
| 1948.01.19 | Apostolic Exarchate of Eastern Canada (Ukrainian Rite) was established (from Apostolic Exarchate of Canada) |
| 1948.01.19 | Apostolic Exarchate of Western Canada (Ukrainian Rite) was established (from Apostolic Exarchate of Canada) |
| 1948.07.17 | Diocese of Saint-Paul was established (from Metropolitan Archdiocese of Edmonton and became suffragan of Edmonton) |
| 1951.02.17 | Military Vicariate of Canada was established |
| 1951.03.02 | Diocese of Sherbrooke was promoted as Metropolitan Archdiocese of Sherbrooke (with suffragan sees Nicolet and Saint-Hyacinthe) |
| 1951.03.10 | Apostolic Exarchate of Western Canada (Ukrainian Rite) was renamed as Apostolic Exarchate of Edmonton |
| 1951.03.10 | Apostolic Exarchate of Central Canada (Ukrainian Rite) was renamed as Apostolic Exarchate of Manitoba (lost territory to establish Apostolic Exarchate of Saskatoon) |
| 1951.03.10 | Apostolic Exarchate of Saskatoon (Ukrainian Rite) was established (from Apostolic Exarchate of Central Canada) |
| 1951.03.10 | Apostolic Exarchate of Eastern Canada (Ukrainian Rite) was renamed as Apostolic Exarchate of Toronto |
| 1951.06.23 | Diocese of Saint-Jérôme was established (from Metropolitan Archdiocese of Montréal, Metropolitan Archdiocese of Ottawa and Diocese of Mont-Laurier and became suffragan of Montréal) |
| 1951.06.23 | Diocese of Sainte-Anne-de-la-Pocatière was established (from Metropolitan Archdiocese of Québec and became suffragan of Québec) |
| 1952.04.29 | Diocese of Fort William was established (from Metropolitan Archdiocese of Saint-Boniface and Diocese of Sault Sainte Marie and became suffragan of Toronto) |
| 1953.07.06 | Diocese of Yarmouth was established (from Metropolitan Archdiocese of Halifax and became suffragan of Halifax) |
| 1956.11.03 | Apostolic Exarchate of Edmonton (Ukrainian Rite) was promoted as Diocese of Edmonton (became suffragan of Winnipeg) |
| 1956.11.03 | Apostolic Exarchate of Saskatoon (Ukrainian Rite) was promoted as Diocese of Saskatoon (became suffragan of Winnipeg) |
| 1956.11.03 | Apostolic Exarchate of Toronto (Ukrainian Rite) was promoted as Diocese of Toronto (became suffragan of Winnipeg) |
| 1956.11.03 | Apostolic Exarchate of Manitoba (Ukrainian Rite) was promoted as Metropolitan Archdiocese of Winnipeg (with suffragan sees Edmonton, Saskatoon and Toronto) |
| 1958.02.22 | Diocese of Harbour Grace was renamed as Diocese of Harbour Grace–Grand Falls |
| 1958.11.22 | Diocese of Saint Catharines was established (from Metropolitan Archdiocese of Toronto and Diocese of Hamilton and became suffragan of Toronto) |
| 1959 | Diocese of Bathurst lost territory to Diocese of Saint John, New Brunswick |
| 1960.02.29 | Diocese of Golfe Saint-Laurent was renamed as Diocese of Hauterive |
| 1963.04.27 | Diocese of Hull was established (from Metropolitan Archdiocese of Ottawa and became suffragan of Ottawa) |
| 1964.10.30 | Diocese of Harbour Grace–Grand Falls was renamed as Diocese of Grand Falls |
| 1967.07.13 | Apostolic Vicariate of Baie d’Hudson was promoted as Diocese of Churchill (became suffragan of Keewatin–Le Pas) |
| 1967.07.13 | Apostolic Vicariate of Grouard was promoted as Metropolitan Archdiocese of Grouard–McLennan (with suffragan sees Mackenzie–Fort Smith, Prince George and Whitehorse) |
| 1967.07.13 | Apostolic Vicariate of Keewatin was promoted as Metropolitan Archdiocese of Keewatin–Le Pas (with suffragan sees Churchill, Labrador–Schefferville and Moosonee) |
| 1967.07.13 | Apostolic Vicariate of Labrador was promoted as Diocese of Labrador–Schefferville (became suffragan of Keewatin–Le Pas) |
| 1967.07.13 | Apostolic Vicariate of Mackenzie was promoted as Diocese of Mackenzie–Fort Smith (became suffragan of Grouard–McLennan) |
| 1967.07.13 | Apostolic Vicariate of Baie de James was promoted as Diocese of Moosonee (became suffragan of Keewatin–Le Pas) |
| 1967.07.13 | Apostolic Vicariate of Prince Rupert was promoted as Diocese of Prince George (became suffragan of Grouard–McLennan) |
| 1967.07.13 | Apostolic Vicariate of Whitehorse was promoted as Diocese of Whitehorse (became suffragan of Grouard–McLennan) |
| 1968.01.29 | Diocese of Churchill was renamed as Diocese of Churchill–Baie d’Hudson |
| 1970.02.26 | Diocese of Fort William was renamed as Diocese of Thunder Bay |
| 1973.11.29 | Diocese of Rouyn-Noranda was established (from Diocese of Timmins and became suffragan of Ottawa) |
| 1974.06.27 | Diocese of New Westminster (Ukrainian Rite) was established (from Diocese of Edmonton and became suffragan of Winnipeg) |
| 1976.09.17 | Diocese of Alexandria in Ontario was renamed as Diocese of Alexandria–Cornwall |
| 1980.10.13 | Diocese of Saint-Sauveur de Montréal (Greek-Melkite Rite) was established (without ecclesiastical province) |
| 1980.10.13 | Diocese of Saints Cyril and Methodius of Toronto (Slovak Rite) was established |
| 1981.07.03 | Apostolic Exarchate of United States of America and Canada (Armenian Rite) was established |
| 1982.01.11 | Apostolic Exarchate of United States of America (Romanian Rite) was established |
| 1982.02.27 | Diocese of Saint-Jean-de-Québec was renamed as Diocese of Saint-Jean–Longueuil |
| 1982.03.01 | Diocese of Hull was renamed as Diocese of Gatineau–Hull |
| 1982.08.27 | Diocese of Saint-Maron de Montréal (Maronite Rite) was established (without ecclesiastical province) |
| 1986.07.14 | Diocese of Hauterive was renamed as Diocese of Baie-Comeau |
| 1986.07.21 | Military Vicariate of Canada was promoted as Military Ordinariate of Military Ordinariate of Canada |
| 1987.03.26 | Apostolic Exarchate of United States of America (Romanian Rite) was promoted as Diocese of Saint George’s in Canton (without ecclesiastical province) |
| 1987.04.27 | Diocese of Labrador–Schefferville was renamed as Diocese of Labrador City–Schefferville |
| 1990.10.31 | Diocese of Gatineau–Hull was promoted as Metropolitan Archdiocese of Gatineau–Hull (with suffragan sees Amos, Mont-Laurier and Rouyn-Noranda) |
| 1998.09.14 | Diocese of Gravelbourg was suppressed (to Metropolitan Archdiocese of Regina and Diocese of Saskatoon) |
| 1998.09.14 | Metropolitan Archdiocese of Regina lost territory to Diocese of Saskatoon |
| 1998.09.14 | Territorial Abbacy of Saint Peter–Muenster was suppressed (to Diocese of Saskatoon) |
| 2005.09.12 | Apostolic Exarchate of United States of America and Canada (Armenian Rite) was promoted as Diocese of Our Lady of Nareg in New York (without ecclesiastical province) |
| 2005.10.28 | Metropolitan Archdiocese of Gatineau–Hull was renamed as Metropolitan Archdiocese of Gatineau |
| 2007.05.31 | Diocese of Amos lost territory to Diocese of Chicoutimi, Diocese of Joliette and Diocese of Trois-Rivières |
| 2007.05.31 | Diocese of Saint George’s was renamed as Diocese of Corner Brook and Labrador (gained territory from the suppressed Diocese of Labrador City–Schefferville) |
| 2007.05.31 | Diocese of Labrador City–Schefferville was suppressed (to Diocese of Amos, Diocese of Baie-Comeau and Diocese of Corner Brook and Labrador) |
| 2007.05.31 | Diocese of Moosonee lost territory to Diocese of Amos |
| 2008.11.11 | Diocese of Bathurst lost territory to Diocese of Saint John, New Brunswick |
| 2009.10.22 | Metropolitan Archdiocese of Halifax was renamed as Metropolitan Archdiocese of Halifax–Yarmouth (gained territory from the suppressed Diocese of Yarmouth and lost suffragan see Yarmouth) |
| 2009.10.22 | Diocese of Yarmouth was suppressed (to Metropolitan Archdiocese of Halifax–Yarmouth) |
| 2010.07.14 | Apostolic Exarchate of United States of America (Syro-Malankar Rite) was established |
| 2011.06.10 | Diocese of Mar Addai of Toronto (Chaldean Rite) was established (without ecclesiastical province) |
| 2012.01.01 | Personal Ordinariate of The Chair of Saint Peter (Anglican Rite) was established |
| 2014.12.29 | Diocese of Our Lady of Nareg in New York (Armenian Rite) was renamed as Diocese of Our Lady of Nareg in Glendale |
| 2015.08.06 | Apostolic Exarchate of Canada (Syro-Malabar Rite) was established |
| 2015.12.22 | Apostolic Exarchate of United States of America (Syro-Malankar Rite) was promoted as Diocese of Saint Mary, Queen of Peace, of the United States of America and Canada (gained territory of Canada and without ecclesiastical province) |
| 2016.01.07 | Apostolic Exarchate of Canada (Syriac Rite) was established (from Diocese of Our Lady of Deliverance of Newark) |
| 2017.03.18 | Diocese of Sault Sainte Marie lost territory to Diocese of Thunder Bay |
| 2018.12.03 | Diocese of Hearst was renamed as Diocese of Hearst–Moosonee (gained territory from the suppressed Diocese of Moosonee) |
| 2018.12.03 | Diocese of Moosonee was suppressed (to Diocese of Hearst–Moosonee) |
| 2018.12.22 | Apostolic Exarchate of Canada (Syro-Malabar Rite) was promoted as Diocese of Mississauga (without ecclesiastical province) |
| 2020.05.06 | Diocese of Alexandria–Cornwall was suppressed (to Metropolitan Archdiocese of Ottawa–Cornwall) |
| 2020.05.06 | Metropolitan Archdiocese of Ottawa was renamed as Metropolitan Archdiocese of Ottawa–Cornwall (gained territory from the suppressed Diocese of Alexandria–Cornwall) |
| 2022.03.03 | Apostolic Exarchate of Saints Cyril and Methodius of Toronto (Ruthenian Rite) was established (from the suppressed Diocese of Saints Cyril and Methodius of Toronto and became suffragan of Pittsburgh) |
| 2022.03.03 | Diocese of Saints Cyril and Methodius of Toronto (Slovak Rite) was suppressed (to establish Apostolic Exarchate of Saints Cyril and Methodius of Toronto) |
| 2022.06.01 | Diocese of Mont-Laurier was suppressed (to Metropolitan Archdiocese of Gatineau and Diocese of Saint-Jérôme–Mont-Laurier) |
| 2022.06.01 | Diocese of Saint-Jérôme was renamed as Diocese of Saint-Jérôme–Mont-Laurier (gained territory from the suppressed Diocese of Mont-Laurier) |
Last updated on 2024.10.02
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