The United Church of Canada (French: Église unie du Canada) is a mainline Protestant denomination that is the largest Protestant Christian denomination in Canada and the second largest Canadian Christian denomination after the Catholic Church in Canada.

The United Church was founded in 1925 as a merger of four Protestant denominations with a total combined membership of about 600,000 members: the Methodist Church, Canada, the Congregational Union of Ontario and Quebec, two-thirds of the congregations of the Presbyterian Church in Canada, and the Association of Local Union Churches, a movement predominantly of the Canadian Prairie provinces. The Canadian Conference of the Evangelical United Brethren Church joined the United Church of Canada on January 1, 1968.

Membership peaked in 1964 at 1.1 million and has declined since that time. From 1991 to 2001, the number of people claiming an affiliation with the United Church decreased by 8%, the third largest decrease in mainstream Christian denominations in Canada. In 2011, Statistics Canada reported approximately 2 million people identifying as adherents. The 2021 Canadian census found that more than 1 million Canadians (3.3% of the population) self-identified with the church, remaining the second-largest Christian denomination in Canada. Church statistics for the end of 2018 showed 388,363 members in 317,051 households under pastoral care, of whom 120,986 attend services regularly in 2,119 communities of faith representing 2,774 congregations.

The United Church has a "council-based" structure, where each council (congregational, regional, or denominational) has specific responsibilities. In some areas, each of these councils has sole authority, while in others, approval of other councils is required before action is taken. (For example, a congregation requires regional council approval before a minister can be called or appointed to the congregation.) The policies of the church are inclusive and liberal: there are no restrictions of gender, sexual orientation or marital status for a person considering entering the ministry; interfaith marriages are recognized; communion is offered to all Christian adults and children, regardless of denomination or age.


L'Église unie du Canada ou EUC (en anglais : United Church of Canada ou UCC) est une Église protestante canadienne. En termes de personnes affiliées, elle est la deuxième Église du Canada, après l'Église catholique romaine, et la première Église protestante. Étant issue de l'union de différentes dénominations, elle appartient à la fois au courant méthodiste et au courant calviniste. Principalement anglophone, l'Église applique un standard de bilinguisme anglais-français « fonctionnel et pratique ».

Selon le recensement de 2011, il y a 2,0 millions de Canadiens qui disent appartenir à cette Église et 121 000 personnes assistent à ses cultes du dimanche. L'Église unie est présente dans les toutes les provinces et territoires canadiens ainsi qu'aux Bermudes.

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