Dioceses and Archdioceses are ecclesiastical jurisdictions under the leadership of a Bishop or an Archbishop.

Eparchies and the Archeparchy are ecclesiastical jurisdictions under the leadership of a Bishop or an Archbishop (also called an Eparch or an Archeparch) of an Eastern Catholic Church.

Pastoral Regions: West / Ontario / Quebec / Atlantic
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Diocese
Website
Alexandria-Cornwall
http://www.alexandria-cornwall.ca
Sault Ste-Marie
http://www.dioceseofsaultstemarie.org
Amos
http://www.diocese-amos.org
Antigonish
http://www.antigonishdiocese.com/
Baie-Comeau
http://www.diocese-bc.net
Bathurst
http://www.diocesebathurst.com
Calgary
http://www.calgarydiocese.ca/
Laval - Apostolic Exarchate for Syro-Catholics in Canada
Canada / USA - Armenian Catholic Eparchy
Mississauga - Syro-Malabar Exarchate of Canada
www.syromalabarcanada.org
Canada / USA - Syro-Malankara Eparchy of St. Mary, Queen of Peace of the USA and Canada
http://www.syromalankarausa.org/
Canada / USA - Eparchy for Romanian Catholic
http://www.romaniancatholic.org
Toronto - Mar Addai Chaldean Catholic Eparchy of Canada
Charlottetown
http://www.dioceseofcharlottetown.com
Chicoutimi
http://www.evechedechicoutimi.qc.ca
Churchill-Hudson Bay
Corner Brook and Labrador
http://www.rcchurch.com
Edmonton - Ukrainian Catholic Eparchy
http://www.edmontoneparchy.com
Edmonton
http://www.caedm.ca
Edmundston
http://www.diocese-edmundston.ca
Gaspé
http://www.diocesegaspe.org/
Gatineau
http://www.diocesegatineau.org
Grand Falls
http://www.rcdiocesegrandfalls.ca
Grouard-McLennan
http://archgm.ca
Halifax-Yarmouth
http://www.halifaxyarmouth.org/
Hamilton
http://www.hamiltondiocese.com
Hearst
http://www.hearstdiocese.com/
Joliette
http://www.diocesedejoliette.org
Kamloops
http://www.rcdk.org
Keewatin-Le Pas
http://www.dioceseofkeewatinlepas.ca
Kingston
http://www.romancatholic.kingston.on.ca
London
http://www.dol.ca
MacKenzie-Fort Smith
http://www.mfsdiocese.org/
Moncton
http://www.diomoncton.ca
Mont-Laurier
http://www.dioceseml.com/
Montréal - Maronite Catholic Eparchy of Canada
http://www.maronites.ca
Montréal
http://diocesemontreal.org
Montréal - Greek-Melkite Catholic Eparchy of Canada
http://www.melkitecanada.org
Moosonee
Nelson
http://www.nelsondiocese.org
New Westminster - Ukrainian Catholic Eparchy
http://www.nweparchy.ca
Nicolet
http://www.diocesenicolet.qc.ca
Ottawa
http://www.catholicottawa.ca/
Pembroke
http://www.pembrokediocese.com
Peterborough
http://www.peterboroughdiocese.org
Prince Albert
http://www.padiocese.ca
Prince George
http://www.pgdiocese.bc.ca/
Québec
http://www.ecdq.org/
Regina
http://www.archregina.sk.ca
Rimouski
http://www.dioceserimouski.com/
Rouyn-Noranda
http://www.diocese-rouyn-noranda.org
Sainte-Anne-de-la-Pocatière
http://www.diocese-ste-anne.net
Saint-Boniface
http://www.archsaintboniface.ca
St. Catharines
http://www.saintcd.com
Saint-Hyacinthe
http://www.diocese-st-hyacinthe.qc.ca
Saint-Jean-Longueuil
http://www.dsjl.org
Saint-Jérôme
http://www.diocesestj.ca
Saint John
http://www.dioceseofsaintjohn.org
St. John's
http://www.rcsj.org
Saint-Paul
http://www.dioceseofstpaul.ca
Saskatoon - Ukrainian Catholic Eparchy
http://www.skeparchy.org
Saskatoon
http://www.saskatoonrcdiocese.com
Sherbrooke
http://www.diocesedesherbrooke.org
Thunder Bay
http://www.dotb.ca
Timmins
http://www.dioctims.ca
Toronto
http://www.archtoronto.org
Toronto and Eastern Canada - Ukrainian Catholic Eparchy
http://www.ucet.ca
Toronto – Eparchy of Saints Cyril and Methodius of Slovaks of the Byzantine Rite in Canada
Trois-Rivières
http://www.diocese-trois-rivieres.org
Valleyfield
http://www.diocesevalleyfield.org
Vancouver
http://www.rcav.org
Victoria
http://www.rcdvictoria.org
Whitehorse
http://www.whitehorsediocese.ca/
Winnipeg
http://www.archwinnipeg.ca
Winnipeg - Ukrainian Catholic Archeparchy
http://www.archeparchy.ca