The 45th Canadian federal election will take place on or before October 20, 2025, to elect members of the House of Commons to the 45th Canadian Parliament. The date of the vote is determined by the fixed-date provisions of the Canada Elections Act, which requires federal elections to be held on the third Monday in October in the fourth calendar year after the polling day of the previous election, though a current government bill proposes to postpone the date to October 27, 2025 to avoid conflicting with Diwali. In addition to the statutory fixed election date provisions, Canada has a constitutional requirement specified in both section 50 of the Constitution Act, 1867 and section 4 of the Canadian Charter of Rights and Freedoms that elections for the House of Commons must be held no more than five years after the preceding election.

The House of Commons of Canada is the lower house of the Parliament of Canada. Together with the Crown and the Senate of Canada, they comprise the bicameral legislature of Canada.