The 2019 Bloc Québécois leadership election was initiated by the resignation of party leader Martine Ouellet in June 2018. While originally scheduled to be held on February 24, 2019 on a one member, one vote basis, Yves-François Blanchet, as the only candidate in the race following the nomination deadline of January 15, 2019, was officially acclaimed Leader of the Bloc Québécois on January 17, 2019.

The 2017 Bloc Québécois leadership election was held on March 14, 2017 to choose a successor to Gilles Duceppe, who resigned on October 22, 2015 after the 2015 Canadian federal election. Rhéal Fortin, MP for Rivière-du-Nord, had been serving as interim leader since Duceppe's resignation. The election was initially scheduled for April 22, 2017 but ended on March 14, 2017 at the end of the nomination period, because there was only one candidate. Ouellet's tenure was controversial due to her staunch separatist views, and, following a leadership vote, she was forced to resign in June 2018.