Sikhism in Canada has nearly 800,000 adherents who account for 2.1% of Canada's population as of 2021, forming the country's fastest-growing and fourth-largest religious group. The largest Sikh populations in Canada are found in Ontario, followed by British Columbia and Alberta. As of the 2021 Census, more than half of Canada's Sikhs can be found in one of four cities: Brampton (163,260), Surrey (154,415), Calgary (49,465), and Edmonton (41,385).

Religion in Canada encompasses a wide range of beliefs and customs that historically has been dominated by Christianity. The constitution of Canada refers to God and the monarch carries the title of Defender of the Faith, however Canada has no official church and the government is officially committed to religious pluralism. Freedom of religion in Canada is a constitutionally protected right, allowing individuals to assemble and worship without limitation or interference.