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Laws surrounding marriage in Canada
The Parliament of Canada has exclusive legislative authority over marriage and divorce in Canada under section 91(26) of the Constitution Act, 1867. However, section 92(12) of the Constitution Act, 1867 gives the provincial legislatures the power to pass laws regulating the solemnization of marriage. The marriage rate in Canada has been declining over the years. In 2001, there were 146,618 marriages in Canada, down 6.8% from 157,395 in 2000, but by 2020, there were only 98,355 marriages registered in Canada, which was the lowest total since 1938. Prince Edward Island had the highest crude marriage rate (6.5 per 1,000 people) and Quebec had the lowest (3.0). Marriage ceremonies in Canada can be either civil or religious. Marriages may be performed by members of the clergy, marriage commissioners, judges, justices of the peace or clerks of the court, depending on the laws of each province and territory regulating marriage solemnization. In 2001, the majority of Canadian marriages (76.4%) were religious, with the remainder (23.6%) being performed by non clergy. Same sex marriage has been legal in Canada nationally since 2005. Court decisions, starting in 2003, had already legalized same sex marriage in eight out of ten provinces and one of three territories.

Both parties must freely consent. Forcing somebody to get married is a criminal offence under s. 293.1 of the Criminal Code. In addition, s. 2.1 of the Civil Marriage Act stipulates, "Marriage requires the free and enlightened consent of two persons to be the spouse of each other."

Since 2015, federal law has set the absolute minimum marriageable age at 16. Provinces and territories may set a minimum age higher than that. In Canada the age of majority is set by province/territory at 18 or 19, so minors under this age have additional restrictions (i. e. parental and court consent). Section 293.2 of the Criminal Code also addresses marriages of individuals under the age of 16, reading: Everyone who celebrates, aids or participates in a marriage rite or ceremony knowing that one of the persons being married is under the age of 16 years is guilty of an indictable offence and liable to imprisonment for a term not exceeding five years. Before 2015, it was possible for children less than 16 years old to get married in some jurisdictions of Canada, with parental consent or a court order. (The legal marriage age with parental consent was possibly as low as 7 in some Canadian jurisdictions.)

British Columbia: 19, or 16 with parental consent. Alberta: 18, or 16 with consent of all parents and legal guardians. Saskatchewan: 18, or 16 with a "Consent to Marriage of a Minor" form signed and completed by the parent(s) or guardian(s) in the presence of a Saskatchewan marriage licence issuer, clergy or any person authorized to take affidavits. "If the parent(s) or guardian(s) refuse to consent to the marriage, the minor can apply to a judge of either the provincial or Queen's Bench court for an order dispensing with their consent. The minor may obtain the judge's order by applying to a court house in Saskatchewan." Manitoba: 18. Ontario: 18, or 16 with written consent from both sets of parents. Quebec: 18, or 16 with authorization from the courts. New Brunswick: 18, or 16 with an affidavit of consent signed by parents or guardians. Nova Scotia: 19, or 16 with a signed consent form. Prince Edward Island: 18, or younger with a consent form signed by parent(s). Newfoundland and Labrador: 19, or younger wherein "special consents may be required." Yukon: 19, or younger with consent of parent(s) or legal guardian(s). Northwest Territories: 19, or younger with parental consent. Nunavut: 19, or 16 with parental consent.

This chart, with data from Statistics Canada, shows the amount of divorces per 100,000 residents of Canada from 1950 to 2008.

In Canada, polygamy is a criminal offence, their prosecutions were the first such cases in Canada in over sixty five years. In 2007, an independent prosecutor in British Columbia recommended that Canadian courts be asked to rule on the constitutionality of laws against polygamy. The Supreme Court of British Columbia upheld Canada's polygamy laws in a 2011 reference case. On March 9, 2018, the Supreme Court of British Columbia reaffirmed the constitutionality of Canada's anti polygamy laws, upholding the July 2017 polygamy convictions of Winston Blackmore and James Oler.