The 43rd Canadian federal election (formally the 43rd Canadian general election) is scheduled to take place on or before October 21, 2019. The October 21 date of the vote is determined by the fixed-date procedures in the Canada Elections Act but the Act does not preclude the Governor General of Canada from issuing the writs of election at an earlier date.

The 2015 federal election resulted in a Liberal majority government headed by Justin Trudeau. The Conservatives became the Official Opposition (with Stephen Harper announcing his resignation as party leader) and the New Democrats (NDP) became the third party. While members of the Bloc Québécois and the Greens were elected to the House, both failed to achieve the required number of MPs for official party status. Bloc leader Gilles Duceppe announced his resignation shortly after the election, and was succeeded by Parti Québécois MNA Martine Ouellet. After losing a leadership review, Ouellet announced she would step down as Bloc leader on June 11, 2018.

Due to Tom Mulcair failing his April 2016 leadership review by garnering only 48% of the delegate vote, the NDP held a leadership election on October 1, 2017, electing Ontario MPP and the former Deputy Leader of the Ontario New Democratic Party Jagmeet Singh as his successor.

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Trudeau sees 2019 election as choice between positive Liberals, divisive Tories