Spouse of the Prime Minister of Canada

The spouse of the Prime Minister of Canada is the wife or husband of the Prime Minister of Canada. Sophie Grégoire-Trudeau is the wife of the current prime minister, Justin Trudeau. To date, 18 women have been the wives of the Prime Minister of Canada; Kim Campbell, the only female prime minister to date, was unmarried during her time in office. The spouse of the prime minister participates alongside the prime minister in various ceremonial, diplomatic, or partisan activities and may pursue philanthropic or charitable endeavours on their own, although the spouses to date have varied in how actively they sought or accepted the public spotlight.

Some media outlets have styled prime ministers' wives as First Lady of Canada, similar to the style of First Lady used in republics. This is not a recognized nor accurately applicable title, as both the spouses of the Canada's monarch and that of the governor general take precedence over a prime minister's spouse. Rather, use of "First Lady" is based on the influence of United States media.

The prime minister is not the head of state; thus, their spouse does not officially play as active a role in Canadian affairs as the royal and viceregal consorts. The prime minister's spouse, however, still frequently accompanies the prime minister on campaign and other public appearances, and often hosting dignitaries at the prime minister's residences. Laureen Harper, wife of former prime minister Stephen Harper, stated of her position "[Michelle Obama] is the First Lady of the United States and it's a defined role... I'm the wife of the Prime Minister—there's no First Lady in Canada... [The Prime Minister's wife] can have a big role, a small role, whatever."

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