2026 Terrebonne federal by-election

2026 Terrebonne federal by-election
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Riding of Terrebonne
Incumbent MP; Vacant;	; ;

A by-election will be held on April 13, 2026, to elect a member of Parliament (MP) to represent Terrebonne, Quebec, in the House of Commons for the remainder of the 45th Parliament after the riding's result in the 2025 general election was annulled by the Supreme Court of Canada on February 13, 2026, vacating the seat held by the then-Liberal Party MP Tatiana Auguste.^[1]

Background

The 2025 federal election result in Terrebonne was contested by the Bloc Québécois candidate, defeated MP Nathalie Sinclair-Desgagné, after a judicial recount awarded the seat to Liberal candidate Tatiana Auguste by one vote. The result was challenged due to a printing error by Elections Canada on a return envelope for mail-in ballots which resulted in an envelope containing a vote for the Bloc Québécois candidate being returned to sender. The Supreme Court of Canada overturned a lower court decision and annulled the result, vacating the seat and requiring a by-election.^[1]

Timing

A writ for the by-election could be issued no sooner than February 27 and no later than August 1, 2026.^[2] Under the Canada Elections Act, the minimum length of a campaign is 36 days between dropping the writ and election day, but must not exceed 50 days. The by-election must also be held on a Monday within that time frame.^[3] Accordingly, the earliest possible date for the by-election was April 6 and the latest was September 28.^[2]

On March 8, the writ was issued for a by-election to be held on April 13.^[4]^[5]^[6] Nominations close on March 23, at 2 pm local time.^[7]

Preparation

After reviewing its internal procedures, Elections Canada announced that, to avert the possibility of misdirected ballots in future, special ballots will no longer be manually prepared by a riding office, but will be centrally and automatically prepared at its Ottawa office. However, the change was not expected to be fully implemented until the fall.^[8]

Candidates

The candidates in 2025 have reappeared for the by-election:

Auguste and Sinclair-Desgagné had already been confirmed as candidates before the by-election was called.^[9]

Conservative Adrienne Charles's candidacy was announced on March 11.^[10] The Greens are fielding Benjamin Rankin again,^[11] as are the NDP with Maxime Beaudoin.^[12] Maria Cantore is also returning for the PPC.^[13]

The Longest Ballot Committee chose Terrebonne as their target out of three by-elections being held simultaneously.^[14] This resulted in a total of 48 candidates when nominations closed, and Elections Canada announced that write-in ballots similar to those used in Battle River—Crowfoot in 2025 would be employed.^[15]

Campaign

Sinclair-Desgagné used the slogan Une voix qui compte! ("A voice/vote that counts!"). She promoted the Bloc platform for supporting seniors and first-time home buyers, and voiced concerns over the proposed routing of the Alto high-speed rail line and potential expropriations for it in the riding.^[16] Local observers note that, besides the issue of the Alto line, other concerns include the construction of new housing and the decontamination of a former DND firing range to make way for a new interchange on Autoroute 640.^[17]

Bloc leader Yves-François Blanchet laughed off suggestions that "fake candidates" could be nominated in the concurrent by-elections being held in Scarborough Southwest and University—Rosedale, in order to create extra campaign financing room in the Terrebonne contest.^[18]

At a Liberal rally, Auguste's advocate claimed that she had "won fair and square" in 2025, and that the Supreme Court of Canada had later decided that it wanted to punish Elections Canada. At a subsequent Bloc rally, Sinclair-Desgagné described that as saugrenu ("absurd"), and said that people would find it strange that the Liberals would distance themselves from a decision of the SCC where normally it would be embraced by the party. That rally also featured posters bearing the slogan Reprenons notre place le 13 avril ("Let's take back our place on April 13").^[19]

Result

v t e Canadian federal by-election, April 13, 2026: Terrebonne 2025 result annulled by Supreme Court
The by-election will be held on April 13, 2026.
Party	Candidate	Votes	%	±%
	Liberal	Tatiana Auguste
	Bloc Québécois	Nathalie Sinclair-Desgagné
	Conservative	Adrienne Charles
	New Democratic	Maxime Beaudoin
	Green	Benjamin Rankin
	People's	Maria Cantore
	Rhinoceros	Mark Moutter
	Independent	Alex Banks
	Independent	Sophia Bearden
	Independent	Myriam Beaulieu
	Independent	Danica Boe
	Independent	Jeani Boudreault
	Independent	Jenny Cartwright
	Independent	Nicolas Champagne
	Independent	Jaël Champagne Gareau
	No Affiliation	Sébastien CoRhino
	Independent	Jayson Cowan
	Independent	Gerrit Dogger
	Independent	Geneviève Dorval
	Independent	Samuel Ducharme
	Independent	Ysack Dupont
	Independent	Elizabeth Dupuis
	Independent	Michael Dyck
	Independent	Alexandra Engering
	Independent	Laurie Goble
	Independent	Emily Goose
	Independent	Anthony Hamel
	Independent	Kazimir Haykowsky
	Independent	Seyed Hosseini Lavasani
	Independent	Ryan Huard
	Independent	Jack Jean-Louis
	Independent	Chris Kowalchuk
	Independent	Krzysztof Krzywinski
	Independent	Joseph Alain Matthew Laveault
	Independent	Jocelyn LeBlanc-Courchaine
	Independent	John Francis O'Flynn
	Independent	Lanna Palsson
	Independent	Samuel Pignedoli
	Independent	Lajos Polya
	Independent	Spencer Rocchi
	Independent	Kayll Schaefer
	Independent	Julie St-Amand
	Independent	Pascal St-Amand
	Independent	Myles René Laurent St. Pierre
	Independent	Justin Steinburg
	Independent	Vivian Unger
	Independent	Bryan Wang
	Independent	Alon Weinberg
Total valid votes/expense limit
Total rejected ballots
Turnout
Eligible voters
Source:

Previous results

2025 nullified result

v t e 2025 Canadian federal election: Terrebonne
Party	Candidate	Votes	%	±%
	Liberal	Tatiana Auguste	23,352	38.741	+9.37
	Bloc Québécois	Nathalie Sinclair-Desgagné	23,351	38.739	−2.66
	Conservative	Adrienne Charles	10,961	18.18	+7.73
	New Democratic	Maxime Beaudoin	1,556	2.58	−4.07
	Green	Benjamin Rankin	630	1.05	−0.38
	People's	Maria Cantore	428	0.71	−1.97
Total valid votes			60,278	98.63
Total rejected ballots			840	1.37	-0.88
Turnout			61,118	67.93	+1.74
Eligible voters			89,966
	Liberal notional gain from Bloc Québécois		Swing		+6.02
Source: Elections Canada^[20]^[21]
Notes: Results were annulled by the Supreme Court of Canada on February 13, 2026.^[22] The results were also subject to an automatic judicial recount on May 7, 2025.^[23] The number of eligible voters does not include election day registrations.

2021 valid result (redistributed)

2021 federal election redistributed results^[24]
Party		Vote	%
	Bloc Québécois	23,298	41.40
	Liberal	16,528	29.37
	Conservative	5,886	10.46
	New Democratic	3,742	6.65
	People's	1,506	2.68
	Green	802	1.43
	Others	4,518	8.03

2021 valid result (actual)

v t e 2021 Canadian federal election: Terrebonne
Party	Candidate	Votes	%	±%	Expenditures
	Bloc Québécois	Nathalie Sinclair-Desgagné	24,270	41.2	-9.4	$28,625.35
	Liberal	Eric Forget	17,475	29.6	+0.3	$6,336.80
	Conservative	Frédérick Desjardins	6,183	10.5	+2.9	$8,029.08
	New Democratic	Luke Mayba	3,913	6.6	-0.9	$7,745.37
	Independent	Michel Boudrias	3,864	6.6	N/A	$16,574.97
	People's	Louis Stinziani	1,594	2.7	+2.0	$0.00
	Green	Dave Hamelin-Schuilenburg	847	2.4	-2.3	$103.94
	Free	Nathan Fortin-Dubé	803	1.4	N/A	$25.71
Total valid votes/expense limit			58,949	97.8	–	$119,339.41
Total rejected ballots			1,355	2.2
Turnout			60,304	66.4
Eligible voters			90,835
	Bloc Québécois hold		Swing		-4.9
Source: Elections Canada^[25]
Notes: The incumbent MP, Michel Boudrias, was not renominated as the candidate for the Bloc Quebecois, and subsequently ran as an Independent^[26]

References

^ Jump up to: ^a ^b "Supreme Court of Canada annuls single-vote win in Terrebonne riding, vacating seat". Montreal Gazette. 2026-02-13. Retrieved 2026-02-13.
^ Jump up to: ^a ^b "A Federal Seat Is Vacant in Terrebonne". Elections Canada. February 16, 2026. Retrieved February 16, 2026.
^ "Result of the 45th General Election in Terrebonne Annulled". Elections Canada. February 13, 2026. Retrieved February 13, 2026.
^ Tumilty, Ryan (March 8, 2026). "Mark Carney calls three byelections for April that could lead to Liberal majority". Toronto Star.
^ Beaulieu-Lépine, Mathilde (March 8, 2026). "Les trois élections partielles fédérales se tiendront le 13 avril" [Three byelections will be held on April 13]. Le Devoir (in French).
^ Bourquin, Chloé (March 8, 2026). "Trois élections partielles fédérales se dérouleront le 13 avril" [Three byelections will roll out on April 13]. La Presse (in French).
^ Stephens, Matthew (March 9, 2025). "Federal byelection in Scarborough Southwest to take place on April 13". Beach Metro Community News. Retrieved March 13, 2026.
^ Proulx, Boris (March 2, 2026). "L'erreur de code postal ne sera plus possible lors du nouveau scrutin dans Terrebonne" [The postal code error will no longer be possible in the new vote in Terrebonne]. Le Devoir (in French).
^ Blais, Stéphane (February 26, 2026). "Liberal, Bloc Québécois candidates set for Terrebonne rematch after court ruling". CBC News.
^ "Conservatives nominate candidates for two coming byelections". The Canadian Press. 11 March 2026. Retrieved 11 March 2026.
^ "Terrebonne byelection to be held April 13, featuring rematch between Liberal and Bloc candidates". Montreal Gazette. March 8, 2026.
^ Maxime Beaudoin's NDP site
^ Maria Cantore's PPC site
^ Haws, Emily (March 16, 2026). "Longest Ballot Committee collecting signatures for potential candidates in Terrebonne by-election". The Globe and Mail.
^ Major, Darren (March 24, 2026). "Montreal-area byelection to use write-in ballots due to dozens of protest". CBC News.
^ "Terrebonne byelection: Bloc Québécois candidate who lost now-nullified election by single vote unveils platform". CityNews. Montreal. March 12, 2026.
^ Proulx, Boris (March 21, 2026). "Terrebonne face au même choix, mais dans un nouveau contexte à Ottawa" [Terrebonne faces the same choice, but in a new context in Ottawa]. Le Devoir (in French).
^ Major, Darren (March 9, 2026). "Bloc leader laughs off running 'fake' byelection candidates outside of Quebec". CBC News.
^ Thériault, William; Lefebvre, Catherine (March 22, 2026). "Le Bloc accuse les libéraux de « nier le verdict de la Cour suprême »" [The Bloc accuses the Liberals of 'denying the Supreme Court's verdict']. La Presse (in French).
^ "Voter information service". Elections Canada. Retrieved May 11, 2025.
^ "Official Voting Results". Elections Canada. Retrieved March 18, 2026.
^ Major, Darren (February 13, 2026). "Supreme Court nullifies Liberal single-vote election win in Montreal-area riding". CBC News.
^ Lopez Stephen, Benjamin (May 10, 2025). "Quebec riding of Terrebonne flips to Liberals after recount shows candidate won by single vote". CBC News. Retrieved May 11, 2025.
^ "Transposition of Votes from the 44th General Election to the 2023 Representation Orders". Elections Canada. Retrieved 9 April 2024.
^ "List of confirmed candidates – September 20, 2021 Federal Election". Elections Canada. Retrieved 2 September 2021.
^ https://www.ctvnews.ca/montreal/article/as-bloc-prepares-for-federal-election-infighting-grows-over-candidate-selection-process/

Notes

^ In 2021, the Conservatives received 10.46% of the vote.
^ In 2021, the Liberals received 29.37% of the vote.
^ In 2021, the BQ received 41.40% of the vote.
^ Tatiana Auguste (Liberal) lost her seat in the House of Commons on February 13, 2026, following the Supreme Court's annulment of the 2025 federal election in Terrebonne.