Circumscription | Cathedral | Type |
| Amos | Cathédrale Sainte-Thérèse-d’Avila  Amos, Québec, Canada  |  Cathedral |
| Antigonish | St. Ninian’s Cathedral Antigonish, Nova Scotia, Canada | Cathedral |
| Antigonish | Église Notre Dame de l’Assomption Arichat, Nova Scotia, Canada |  Former Cathedral |
| Baie-Comeau | Cathédrale Saint-Jean-Eudes Baie-Comeau, Québec, Canada | Cathedral |
| Baie-Comeau | Église Sainte-Amélie Baie-Comeau, Québec, Canada | Former Cathedral |
| Baie-Comeau | Ancienne Cathédrale du Cœur-Immaculé de Marie Schefferville, Québec, Canada |  Former Cathedral |
| Bathurst | Cathédrale Sacré-Cœur Bathurst, New Brunswick, Canada | Cathedral |
| Calgary | St. Mary’s Cathedral Calgary, Alberta, Canada | Cathedral |
| Canada (Syriac Rite) | Cathédrale syriaque Saint-Éphrem Chomedey, Québec, Canada |  Cathedral |
| Charlottetown | Cathedral Basilica of St. Dunstan Charlottetown, Prince Edward Island, Canada |  Cathedral, Minor Basilica |
| Chicoutimi | Cathédrale Saint-François-Xavier Chicoutimi, Québec, Canada | Cathedral |
| Churchill–Baie d’Hudson | Cathédrale Saints-Martyrs-Canadiens-et-Reine-des-Martyrs Churchill, Manitoba, Canada | Cathedral |
| Corner Brook and Labrador | Cathedral of the Holy Redeemer and Immaculate Conception Corner Brook, Newfoundland and Labrador, Canada | Cathedral |
| Corner Brook and Labrador | Basilica of Our Lady of Perpetual Help Labrador City, Newfoundland and Labrador, Canada |  Former Cathedral, Minor Basilica |
| Corner Brook and Labrador | Church of St. Joseph St. George’s, Newfoundland and Labrador, Canada | Former Cathedral |
| Edmonton | St. Joseph’s Cathedral Basilica Edmonton, Alberta, Canada | Cathedral, Minor Basilica |
| Edmonton (Ukrainian Rite) | St. Josaphat’s Cathedral Edmonton, Alberta, Canada | Cathedral |
| Edmundston | Cathédrale de l’Immaculée-Conception Edmundston, New Brunswick, Canada | Cathedral |
| Gaspé | Cathédrale du Christ-Roi Gaspé, Québec, Canada | Cathedral |
| Gatineau | Cathédrale Saint-Joseph Gatineau, Québec, Canada | Cathedral |
| Gatineau | Église Saint-Jean-Marie-Vianney Gatineau, Québec, Canada | Former Cathedral |
| Grand Falls | Cathedral of the Immaculate Conception Grand Falls-Windsor, Newfoundland and Labrador, Canada | Cathedral |
| Grand Falls | Former Cathedral of the Immaculate Conception Harbour Grace, Newfoundland and Labrador, Canada | Former Cathedral |
| Grouard–McLennan | Cathedral of St. John the Baptist McLennan, Alberta, Canada | Cathedral |
| Grouard–McLennan | Church of St. Bernard Grouard, Alberta, Canada | Former Cathedral |
| Halifax–Yarmouth | St. Mary’s Cathedral Basilica Halifax, Nova Scotia, Canada | Cathedral, Minor Basilica |
| Halifax–Yarmouth | St. Ambrose Co-Cathedral Yarmouth, Nova Scotia, Canada |  Co-Cathedral |
| Hamilton | Cathedral Basilica of Christ the King Hamilton, Ontario, Canada | Cathedral, Minor Basilica |
| Hamilton | St. Mary’s Pro-Cathedral Hamilton, Ontario, Canada | Former Cathedral |
| Hearst–Moosonee | Cathédrale Notre-Dame-de-l’Assomption Hearst, Ontario, Canada | Cathedral |
| Hearst–Moosonee | Basilica of Christ the King Moosonee, Ontario, Canada | Former Cathedral, Minor Basilica, Parish |
| Joliette | Cathédrale Saint-Charles-Borromée Joliette, Québec, Canada | Cathedral |
| Kamloops | Sacred Heart Cathedral Kamloops, British Columbia, Canada | Cathedral |
| Keewatin–Le Pas | Our Lady of the Sacred Heart Cathedral The Pas, Manitoba, Canada | Cathedral |
| Kingston | Cathedral of St. Mary of the Immaculate Conception Kingston, Ontario, Canada | Cathedral |
| London | St. Peter’s Cathedral Basilica London, Ontario, Canada | Cathedral, Minor Basilica |
| London | Church of Our Lady of the Assumption Windsor, Ontario, Canada | Former Cathedral |
| MacKenzie–Fort Smith | Cathédrale Saint-Joseph Fort Smith, Northwest Territories, Canada | Cathedral |
| MacKenzie–Fort Smith | Co-Cathedral of St. Patrick Yellowknife, Northwest Territories, Canada | Co-Cathedral, Parish |
| Mar Addai of Toronto (Chaldean Rite) | Cathedral of the Good Shepherd North York, Ontario, Canada | Cathedral |
| Mississauga (Syro-Malabar Rite) | St. Alphonsa Syro-Malabar Catholic Cathedral Mississauga, Ontario, Canada | Cathedral |
| Moncton | Cathédrale Notre-Dame-de-l’Assomption Moncton, New Brunswick, Canada | Cathedral |
| Mont-Laurier | Cathédrale Notre-Dame-de-Fourvière Mont-Laurier, Québec, Canada | Cathedral |
| Montréal | Basilique-Cathédrale Marie-Reine-du-Monde et Saint-Jacques Montréal, Québec, Canada | Cathedral, Minor Basilica |
| Montréal | Ancienne cathédrale Saint-Jacques Montréal, Québec, Canada | Former Cathedral |
| Nelson | Cathedral of Mary Immaculate Nelson, British Columbia, Canada | Cathedral |
| New Westminster (Ukrainian Rite) | Cathedral of the Holy Eucharist New Westminster, British Columbia, Canada | Cathedral |
| Nicolet | Cathédrale Saint-Jean-Baptiste Nicolet, Québec, Canada | Cathedral |
| Ottawa–Cornwall | Basilique-Cathédrale Notre-Dame-d’Ottawa Ottawa, Ontario, Canada | Cathedral, Minor Basilica |
| Ottawa–Cornwall | Cocathédrale de la Nativité de la Bienheureuse Vierge Marie Cornwall, Ontario, Canada | Co-Cathedral |
| Ottawa–Cornwall | Basilica of St. Finnan Alexandria, Ontario, Canada | Former Cathedral, Minor Basilica |
| Ottawa–Cornwall | Former Church of St. Raphael Saint Raphaels (South Glengarry), Ontario, Canada | Former Cathedral |
| Pembroke | St. Columbkille Cathedral Pembroke, Ontario, Canada | Cathedral |
| Peterborough | Cathedral of St. Peter in Chains Peterborough, Ontario, Canada | Cathedral |
| Prince Albert | Sacred Heart Cathedral Prince Albert, Saskatchewan, Canada | Cathedral |
| Prince George | Sacred Heart Cathedral Prince George, British Columbia, Canada | Cathedral |
| Québec | Basilique-Cathédrale Notre-Dame-de-Québec Québec, Québec, Canada | Cathedral, Minor Basilica,  World Heritage Site |
| Regina | Cathedral of Our Lady of the Holy Rosary Regina, Saskatchewan, Canada | Cathedral |
| Regina | Our Lady of Assumption Co-Cathedral Gravelbourg, Saskatchewan, Canada | Co-Cathedral |
| Rimouski | Cathédrale Saint-Germain Rimouski, Québec, Canada | Cathedral |
| Rouyn-Noranda | Cathédrale Saint-Joseph Rouyn-Noranda, Québec, Canada | Cathedral |
| Rouyn-Noranda | Ancienne cathédrale Saint-Michel-Archange Rouyn-Noranda, Québec, Canada | Former Cathedral |
| Saint-Boniface | Basilique-Cathédrale Saint-Boniface Winnipeg, Manitoba, Canada | Cathedral, Minor Basilica |
| Saint Catharines | Cathedral of St. Catherine of Alexandria St. Catharines, Ontario, Canada | Cathedral |
| Sainte-Anne-de-la-Pocatière | Cathédrale Sainte-Anne La Pocatière, Québec, Canada | Cathedral |
| Saint-Hyacinthe | Cathédrale Saint-Hyacinthe-le-Confesseur Saint-Hyacinthe, Québec, Canada | Cathedral |
| Saint-Hyacinthe | Église Saint-Matthieu Beloeil, Québec, Canada | Former Cathedral |
| Saint-Jean–Longueuil | Cathédrale Saint-Jean-l’Évangéliste Saint-Jean-sur-Richelieu, Québec, Canada | Cathedral |
| Saint-Jean–Longueuil | Cocathédrale Saint-Antoine-de-Padoue Longueuil, Québec, Canada | Co-Cathedral |
| Saint-Jérôme | Cathédrale Saint-Jérôme Saint-Jérôme, Québec, Canada | Cathedral |
| Saint John, New Brunswick | Cathedral of the Immaculate Conception Saint John, New Brunswick, Canada | Cathedral |
| Saint John, New Brunswick | Basilica of St. Michael the Archangel Miramichi, New Brunswick, Canada | Former Cathedral, Minor Basilica, Parish |
| Saint John’s, Newfoundland | Cathedral Basilica of St. John the Baptist St. John’s, Newfoundland and Labrador, Canada | Cathedral, Minor Basilica |
| Saint-Maron de Montréal (Maronite Rite) | Cathédrale Saint-Maron Montréal, Québec, Canada | Cathedral |
| Saint-Paul | St. Paul’s Cathedral Saint-Paul, Alberta, Canada | Cathedral |
| Saint-Sauveur de Montréal (Greek-Melkite Rite) | Cathédrale de Saint-Sauveur Montréal, Québec, Canada | Cathedral |
| Saint-Sauveur de Montréal (Greek-Melkite Rite) | Former Cathedral of the Transfiguration of Our Lord Markham, Ontario, Canada |  Former Cathedral |
| Saints Cyril and Methodius of Toronto (Slovak Rite) | Chrám Narodenia Bohorodičky Toronto, Ontario, Canada | Cathedral |
| Saskatoon | Cathedral of the Holy Family Saskatoon, Saskatchewan, Canada | Cathedral |
| Saskatoon | Co-Cathedral of St. Paul Saskatoon, Saskatchewan, Canada | Co-Cathedral |
| Saskatoon | Co-Cathedral of St. Peter Muenster, Saskatchewan, Canada | Co-Cathedral |
| Saskatoon (Ukrainian Rite) | Ukrainian Catholic Cathedral of St. George Saskatoon, Saskatchewan, Canada | Cathedral |
| Sault Sainte Marie | Precious Blood Cathedral Sault Sainte Marie, Ontario, Canada | Cathedral |
| Sault Sainte Marie | Assumption Pro-Cathedral North Bay, Ontario, Canada |  Pro-Cathedral |
| Sherbrooke | Basilique-Cathédrale Saint-Michel Sherbrooke, Québec, Canada | Cathedral, Minor Basilica |
| The Chair of Saint Peter (Anglican Rite) | Church of the Annunciation of the Blessed Virgin Mary Ottawa, Ontario, Canada | Former Cathedral, Parish |
| Thunder Bay | St. Patrick Cathedral Thunder Bay, Ontario, Canada | Cathedral |
| Timmins | Cathédrale Saint-Antoine-de-Padoue Timmins, Ontario, Canada | Cathedral |
| Timmins | Église Sainte-Croix Haileybury, Ontario, Canada | Former Cathedral |
| Toronto | St. Michael’s Cathedral Basilica Toronto, Ontario, Canada | Cathedral, Minor Basilica |
| Toronto (Ukrainian Rite) | St. Josaphat’s Cathedral Toronto, Ontario, Canada | Cathedral |
| Trois-Rivières | Cathédrale de l’Assomption Trois-Rivières, Québec, Canada | Cathedral |
| Valleyfield | Basilique-Cathédrale Sainte-Cécile Salaberry-de-Valleyfield, Québec, Canada | Cathedral, Minor Basilica |
| Vancouver | Holy Rosary Cathedral Vancouver, British Columbia, Canada | Cathedral |
| Victoria | St. Andrew Cathedral Victoria, British Columbia, Canada | Cathedral, Parish |
| Victoria | Former Cathedral of St. Andrew Victoria, British Columbia, Canada | Former Cathedral |
| Whitehorse | Sacred Heart Cathedral Whitehorse, Yukon, Canada | Cathedral |
| Winnipeg | St. Mary’s Cathedral Winnipeg, Manitoba, Canada | Cathedral |
| Winnipeg (Ukrainian Rite) | Cathedral of Sts. Vladimir and Olga Winnipeg, Manitoba, Canada | Cathedral |
