List of Catholic dioceses in Canada

a Latin Church hierarchy, consisting of eighteen ecclesiastical provinces each headed by a metropolitan archbishop, with a total of 54 suffragan dioceses, each headed by a bishop, and a non-metropolitan archbishopric, plus a military ordinariate.
a Ukrainian Catholic ecclesiastical province, comprising a metropolitan archeparchy and four suffragan eparchies
six single jurisdictions for other Eastern Catholic Churches.

Those bishops all belong to the Canadian episcopal conference, the Canadian Conference of Catholic Bishops.
Three Eastern Catholic churches have US-based North American jurisdictions covering Canada, as does the Latin Personal Ordinariate of the Chair of Saint Peter for former Anglicans headquartered in the US.
There also in an Apostolic Nunciature to Canada as papal diplomatic representation.

Current Latin Provinces and Dioceses

Latin ''sui iuris'' jurisdictions

The following particular churches are not suffragan to metropolitan sees, but are instead immediately subject to the Holy See:

The Archdiocese of Winnipeg is an independent Latin Church district, serving southwestern portions of Manitoba.
The Military Ordinariate of Canada serves Canadian servicemen abroad and is not defined by geographical territory.
The Personal Ordinariate of the Chair of Saint Peter serves Catholics of the Anglican Use in both Canada and the United States.

Ecclesiastical province of Edmonton

The province geographically consists of the majority of Alberta, except for the province's northwestern corner.

Ecclesiastical province of Gatineau

The province geographically consists of the western third of Quebec.

Ecclesiastical province of Grouard–McLennan

The province geographically consists of the entirety of the Yukon and the Northwest Territories, plus the northwestern corner of Alberta, the western third of Nunavut, a northern portion of British Columbia above 57 degrees latitude, and a tiny portion of northern Saskatchewan.

Ecclesiastical province of Halifax–Yarmouth

The province is geographically conterminous with the provinces of Nova Scotia and Prince Edward Island.

Ecclesiastical province of Keewatin–Le Pas

The province geographically consists of the northern half of Manitoba, the northern third of Saskatchewan, the eastern two-thirds of Nunavut, and a portion of northwestern Ontario.

Ecclesiastical province of Kingston

The province geographically consists of central and parts of eastern Ontario.

Ecclesiastical province of Moncton

The province is geographically coterminous with the province of New Brunswick.

Ecclesiastical province of Montréal

The province geographically consists of south-central portions of Quebec.

Ecclesiastical province of Ottawa–Cornwall

The province geographically consists of northeastern and parts of eastern Ontario.

Ecclesiastical province of Québec

The province geographically consists of north-central portions of Quebec.

Ecclesiastical province of Regina

The province geographically consists of the southern two-thirds of Saskatchewan.

Ecclesiastical province of Rimouski

The province geographically consists of northeastern portions of Quebec.

Ecclesiastical province of Saint Boniface

The province geographically consists of the southeastern portion of Manitoba.

Archdiocese of Saint Boniface

Ecclesiastical province of St. John's

The province is geographically coterminous with the province of Newfoundland and Labrador.

Ecclesiastical province of Sherbrooke

The province geographically consists of portions of southeastern Quebec.

Ecclesiastical province of Toronto

The province geographically consists of southern and portions of northwestern Ontario.

Ecclesiastical province of Vancouver

The province is geographically coterminous with the province of British Columbia except for the northernmost portion of B.C. above 57 degrees latitude.

Current Eastern Catholic province and dioceses

These belong to particular churches sui iuris, which use a non-Latin rite but are in full communion with Rome and the entirety of the Catholic Church, yet have their own patriarch or other hierarch directly under Rome

Metropolia of Winnipeg (Ukrainian Catholic)

The Ukrainian Greek Catholic Church in Canada, a particular church, using the Byzantine Rite in both the Ukrainian language and local vernacular, is organized into a metropolia consisting of a metropolitan archeparchy and its four suffragan eparchies :

Other Eastern Catholic dioceses in Canada

Chaldean Catholic Eparchy of Mar Addai of Toronto, part of the Chaldean Catholic Church
Maronite Catholic Eparchy of Saint Maron of Montreal, part of the Maronite Church
Melkite Greek Catholic Eparchy of Saint-Sauveur of Montréal, part of the Melkite Greek Catholic Church
Syro-Malabar Catholic Eparchy of Mississauga, part of the Syro-Malabar Catholic Church
Syriac Catholic Apostolic Exarchate of Canada, part of the Syriac Catholic Church
Slovak Catholic Exarchate of Saints Cyril and Methodius of Toronto, part of the Byzantine Catholic Metropolis of Pittsburgh, USA.

International Eastern Catholic jurisdictions

Several Eastern Catholic Churches have jurisdictions that include members and congregations in both the United States and Canada:

Former jurisdictions

Titular see

Diocese of Gravelbourg

Other suppressed jurisdictions

Nearly all other former jurisdictions have direct successors, usually after promotion, except :

Apostolic Prefecture of Placentia, suppressed
Territorial Abbacy of Saint Peter–Muenster, suppressed
Diocese of Labrador City–Schefferville, suppressed
Diocese of Harbour Grace, suppressed
Diocese of Moosonee, suppressed
Diocese of Yarmouth, suppressed
Diocese of Alexandria-Cornwall, suppressed
Diocese of St. George's, suppressed