A by-election will be held to elect a member of Parliament (MP) to represent Rosemont—La Petite-Patrie, Quebec, in the House of Commons for the remainder of the 45th Parliament, following the resignation of Independent MP Alexandre Boulerice.

Background Boulerice was first elected to the House of Commons in the 2011 Canadian federal election, when the New Democratic Party made major gains in Quebec. He was subsequently re-elected in 2015, 2019, 2021 and 2025. By 2026, Boulerice was the last remaining Quebec MP elected as part of the NDP's 2011 Orange Wave.

In the 2025 Canadian federal election, Boulerice was re-elected with 24,358 votes, or 40.99% of the vote. Liberal candidate Jean-Sébastien Vallée finished second with 31.57%, followed by Bloc Québécois candidate Olivier Gignac with 18.28%, Conservative candidate Laetitia Tchatat with 6.85%, and Green candidate Benoît Morham with 2.30%.

On April 27, 2026, Boulerice announced that he would leave the NDP and seek election to the National Assembly of Quebec as a Québec solidaire candidate in Gouin in the 2026 Quebec general election. He subsequently left the NDP caucus and sat in the House of Commons as an independent.

Boulerice formally resigned his seat on August 25, 2026, ahead of the start of the Quebec provincial election campaign. He had represented Rosemont—La Petite-Patrie for five consecutive terms and had served in a number of senior NDP roles, including as deputy leader of the party.

Constituency

Rosemont—La Petite-Patrie is an urban federal electoral district in Montreal, Quebec. The riding covers much of the Rosemont–La Petite-Patrie borough, including the neighbourhoods of Rosemont and Little Italy.

The riding had been represented by Boulerice since 2011. In the 2025 federal election, the NDP retained the seat with 40.99% of the vote, while the Liberals increased their share to 31.57%. The Bloc Québécois finished third with 18.28%.

Timing On August 27, 2026, Elections Canada announced that Chief Electoral Officer Stéphane Perrault had received official notice from the Speaker of the House of Commons on August 26 that the seat was vacant.

Under the Parliament of Canada Act, the date of the by-election must be announced between September 6, 2026, and February 22, 2027. Once the by-election is called, election day must be a Monday at least 36 days and no more than 50 days after the issue of the writ. Elections Canada stated that the earliest possible date for the by-election is October 12, 2026.

Candidates The Bloc Québécois announced Alexandre Curzi as its prospective candidate on June 18, 2026. Curzi is the executive director of the Union des artistes (UDA) and previously served as president of the Alliance québécoise des techniciens et techniciennes de l'image et du son. He is the son of actor and former Parti Québécois MNA Pierre Curzi.

The New Democratic Party selected Pierre Céré as its candidate on July 16, 2026. Céré is a longtime advocate for unemployed workers and former spokesperson for the Conseil national des chômeurs. He had previously sought the leadership of the Parti Québécois in the 2015 Parti Québécois leadership election. NDP leader Avi Lewis subsequently campaigned in the riding with Céré.

Result

Previous result

See also

By-elections to the 45th Canadian Parliament Rosemont—La Petite-Patrie

Notes

References