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Terrebonne (federal electoral district)

Quebec electoral district
Interactive map of riding boundaries from the 2025 federal election
House of Commons
Tatiana AugusteLiberal

1867
1867
2026
profile, map
106,322
83,775
159
668.7
Les Moulins
Terrebonne (part)

Terrebonne (.mw-parser-output .IPA-label-small{font-size:85%}.mw-parser-output .references .IPA-label-small,.mw-parser-output .infobox .IPA-label-small,.mw-parser-output .navbox .IPA-label-small{font-size:100%}French pronunciation: [tɛʁbɔn]) is a federal electoral district in the Canadian province of Quebec. It was represented in the House of Commons of Canada from 1867 to 1997, when it was dissolved in an electoral redistribution. It was reconstituted as an electoral district beginning with the 2015 election.

The riding was originally created by the British North America Act 1867 which preserved existing electoral districts in Lower Canada. It was abolished in 1996 into Repentigny and Terrebonne—Blainville.

It was recreated during the 2012 federal electoral redistribution from parts of Terrebonne—Blainville (51%) and Montcalm (49%), and consisted solely of the city of Terrebonne. After the 2022 Canadian federal electoral redistribution, the southwestern corner of the city was transferred to Thérèse-De Blainville.

The riding drew headlines in the 2025 federal election, as it was initially called for the Bloc Québécois, but its recount led to Liberal candidate Tatiana Auguste winning by a margin of one vote, the narrowest result in the country. One voter in the district had her ballot returned as undeliverable due to an incorrect postal code printed on the pre-addressed ballot return envelope from Elections Canada; had her vote for the Bloc Québécois candidate been counted, the result would have been tied.

After Elections Canada stated that it did not have legal standing to overturn the judicial recount, the Bloc Québécois announced it would be asking the Superior Court of Quebec for a new by-election to be held. On October 27, the court ruled that a byelection would not be held. On November 3, Sinclair-Desgagné announced that she would be appealing the ruling to the Supreme Court of Canada.

On February 13, 2026, the Supreme Court annulled the result of the election in the riding, triggering a federal by-election. The by-election was held in April 2026, with Auguste winning by a margin of 731 votes, keeping the seat in Liberal control.

According to the 2021 Canadian census, 2023 representation order

Racial groups: 83.2% White, 10.4% Black, 2.5% Arab, 2.2% Latin American, 1.4% Indigenous Languages: 87.3% French, 4.2% English, 2.3% Creole, 2.3% Spanish, 1.4% Arabic, 1.0% Italian Religions: 68.9% Christian (57.9% Catholic, 11.0% Other), 4.2% Muslim, 26.1% None Median income: $45,600 (2020) Average income: $53,750 (2020)

vte2025 Canadian federal election
	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
Notes: Results were annulled by the Supreme Court of Canada on February 13, 2026. The results were also subject to an automatic judicial recount on May 7, 2025. The number of eligible voters does not include election day registrations.

2021 federal election redistributed results
	Bloc Québécois	23,298	41.40
	Liberal	16,528	29.37
	Conservative	5,886	10.46
	Independent	3,762	6.68
	New Democratic	3,742	6.65
	People's	1,506	2.68
	Green	802	1.43
	Free	756	1.34
Total valid votes	56,280	97.75
Rejected ballots	1,296	2.25
Registered voters/ estimated turnout	86,986	66.19

vte2021 Canadian federal election
	Bloc Québécois	Nathalie Sinclair-Desgagné	24,270	41.17	-9.42	$28,625.35
	Liberal	Eric Forget	17,475	29.64	+0.39	$6,336.80
	Conservative	Frédérick Desjardins	6,183	10.49	+2.92	$8,029.08
	New Democratic	Luke Mayba	3,913	6.64	-0.91	$7,745.37
	Independent	Michel Boudrias	3,864	6.55	N/A	$16,574.97
	People's	Louis Stinziani	1,594	2.70	+2.05	$0.00
	Green	Dave Hamelin-Schuilenburg	847	1.44	-2.28	$103.94
	Free	Nathan Fortin-Dubé	803	1.36	N/A	$25.71
Total valid votes/expense limit	58,949	97.75	–	$119,339.41
Total rejected ballots	1,355	2.25	+0.20
Turnout	60,304	66.25	-4.06
Eligible voters	91,028
	Bloc Québécois hold	Swing	-4.90
Source: Elections Canada
Notes: The incumbent MP, Michel Boudrias, was not renominated as the candidate for the Bloc Quebecois, and subsequently ran as an Independent

vte2019 Canadian federal election
	Bloc Québécois	Michel Boudrias	31,029	50.59	+17.58	$20,129.32
	Liberal	Frédéric Beauchemin	17,944	29.26	+1.26	none listed
	Conservative	France Gagnon	4,640	7.57	-3.78	$1,869.33
	New Democratic	Maxime Beaudoin	4,627	7.54	-18.07	$0.33
	Green	Réjean Monette	2,277	3.71	+1.97	none listed
	People's	Jeffrey Barnes	399	0.65		none listed
	Rhinoceros	Paul Vézina	260	0.42		$0.00
	Independent	Jade Hébert	159	0.26		$0.00
Total valid votes/expense limit	61,335	97.95
Total rejected ballots	1,282	2.05	-0.06
Turnout	62,617	70.31	-0.15
Eligible voters	89,062
	Bloc Québécois hold	Swing	+8.16
Source: Elections Canada

vte2015 Canadian federal election
	Bloc Québécois	Michel Boudrias	19,238	33.01	+2.23	$17,316.45
	Liberal	Michèle Audette	16,316	27.99	+21.07	$28,471.60
	New Democratic	Charmaine Borg	14,928	25.61	-25.93	$66,226.31
	Conservative	Michel Surprenant	6,615	11.35	+3.28	$4,734.68
	Green	Susan Moen	1,016	1.74	-0.95	–
	Strength in Democracy	Louis Clément Sénat	171	0.29	–	$1,208.41
Total valid votes/expense limit	58,284	97.89		$222,232.39
Total rejected ballots	1,256	2.11	–
Turnout	59,540	70.46	–
Eligible voters	84,502
	Bloc Québécois gain from New Democratic	Swing	+14.08
Source: Elections Canada


New Democratic	25,625	51.54
Bloc Québécois	15,304	30.78
Conservative	4,011	8.07
Liberal	3,440	6.92
Green	1,339	2.69

vte1993 Canadian federal election
	Bloc Québécois	Benoît Sauvageau	58,030	68.87
	Liberal	Claire Brouillet	15,102	17.92	-0.62
	Progressive Conservative	Jean-Marc Robitaille	9,825	11.66	-41.09
	New Democratic	Renée-Claude Lorimier	900	1.07	-9.67
	Commonwealth of Canada	Christian Chouery	403	0.48
Total valid votes	84,260	95.50
Total rejected ballots	3,973	4.50	+2.09
Turnout	88,233	79.12	+5.29
Eligible voters	111,511
	Bloc Québécois gain from Progressive Conservative	Swing	+54.98
Source: Canadian Elections Database

vte1988 Canadian federal election
	Progressive Conservative	Jean-Marc Robitaille	35,345	52.76	-7.55
	Liberal	Claire Brouillet	12,422	18.54	-7.66
	Independent	Robert Toupin	10,390	15.51
	New Democratic	Lauraine Vaillancourt	7,194	10.74	+1.86
	Rhinoceros	Alain Cowboy De Lagrave	1,647	2.46
Total valid votes	66,998	97.59
Total rejected ballots	1,655	2.41	+0.21
Turnout	68,653	73.84	-1.09
Eligible voters	68,653
	Progressive Conservative hold	Swing	+0.06
Source: Elections Canada

vte1984 Canadian federal election
	Progressive Conservative	Robert Toupin	43,822	60.30	+51.19
	Liberal	Joseph-Roland Comtois	19,040	26.20	-42.20
	New Democratic	Brian Umansky	6,454	8.88	-4.04
	Parti nationaliste	Jean-A. Bonin	3,060	4.21
	Commonwealth of Canada	Claude Brosseau	292	0.40
Total valid votes	72,668	97.80
Total rejected ballots	1,634	2.20	+0.82
Turnout	74,302	74.93	+7.98
Electors on the lists	99,162
	Progressive Conservative gain from Liberal	Swing	+46.70
Source: Report of the Chief Electoral Officer, Thirty-third General Election, 1984.

vte1980 Canadian federal election
	Liberal	Joseph-Roland Comtois	36,089	68.40	+6.11
	New Democratic	Gilles Bertrand	6,817	12.92	+7.35
	Progressive Conservative	Jacques Dupuis	4,807	9.11	-1.34
	Social Credit	Georgette Grenier	2,839	5.38	-12.93
	Rhinoceros	Pédro Gervais G.D. Drapeau	1,844	3.50	+1.16
	Union populaire	Réal Godin	233	0.44	-0.09
	Marxist–Leninist	Jacques Coderre	131	0.25	-0.04
Total valid votes	52,760	98.62
Total rejected ballots	738	1.38
Turnout	53,498	66.95
Eligible voters	79,910
	Liberal hold	Swing	-0.62
Source: Canadian Elections Database

vte1979 Canadian federal election
	Liberal	Joseph-Roland Comtois	34,839	62.29	+7.22
	Social Credit	Georgette Grenier	10,239	18.31	+14.01
	Progressive Conservative	Louis-Rhéal Tremblay	5,845	10.45	-23.77
	New Democratic	Roland Francis	3,114	5.57	+2.71
	Rhinoceros	Jean-Marie Da Silva	1,306	2.34
	Union populaire	Réal Godin	298	0.53
	Marxist–Leninist	André Cousineau	164	0.29
	Communist	Gaétan Trudel	122	0.22	-0.42
Total valid votes	55,927	100.0
	Liberal hold	Swing	-3.40

Canadian federal by-election, 24 May 1977
On Mr. Comtois' resignation, 25 October 1976
	Liberal	Joseph-Roland Comtois	25,006	55.1	-1.1
	Progressive Conservative	Roger Delorme	15,539	34.2	+14.8
	Social Credit	Jean Léveillé	1,949	4.3	-11.7
	New Democratic	Pierre Demers	1,299	2.9	-4.6
	Independent	Gilles Mélançon	1,151	2.5
	Communist	Claude Demers	290	0.6	+0.1
	Independent	J. Noël St-Michel	167	0.4
Total valid votes	45,401	100.0

vte1974 Canadian federal election
	Liberal	Joseph-Roland Comtois	28,652	56.1	+9.1
	Progressive Conservative	Gilles Mélançon	9,897	19.4	-5.4
	Social Credit	Guy Meunier	8,138	15.9	-4.6
	New Democratic	Pierre Demers	3,812	7.5	-0.1
	Marxist–Leninist	Françoise Daoust	272	0.5
	Communist	Nicole Ledoux	265	0.5
Total valid votes	51,036	100.0
lop.parl.ca

vte1972 Canadian federal election
	Liberal	Joseph-Roland Comtois	24,928	47.1	-15.0
	Social Credit	Guy Meunier	13,136	24.8	+20.8
	Progressive Conservative	Michel Coté	10,885	20.5	+0.3
	New Democratic	Pierre Demers	4,022	7.6	-3.7
Total valid votes	52,971	100.0
Note: Social Credit vote is compared to Ralliement créditiste vote in the 1968 election.
Source: lop.parl.ca

vte1968 Canadian federal election
	Liberal	Joseph-Roland Comtois	21,191	62.0	+17.8
	Progressive Conservative	Jacques Vachon	6,934	20.3	-7.1
	New Democratic	Jean-Maurice Sénécal	3,860	11.3	-2.9
	Ralliement créditiste	Rosario Therrien	1,363	4.0	-10.2
	Démocratisation Économique	Pierre Therrien	824	2.4
Total valid votes	34,172	100.0

vte1965 Canadian federal election
	Liberal	Léo Cadieux	16,806	44.2	-1.8
	Progressive Conservative	André Fauteux	10,417	27.4	+15.8
	Ralliement créditiste	Jean-Marc Fontaine	5,412	14.2	-18.7
	New Democratic	Jean-Maurice Sénécal	5,384	14.2	+4.7
Total valid votes	38,019	100.0

Note: Ralliement créditiste vote is compared to Social Credit vote in the 1963 election.

vte1963 Canadian federal election
	Liberal	Léo Cadieux	19,015	46.0	+6.8
	Social Credit	Hubert Murray	13,618	33.0	+9.6
	Progressive Conservative	Bert Walker	4,798	11.6	-16.5
	New Democratic	Gérard Gagnon	3,895	9.4	+0.1
Total valid votes	41,326	100.0

vte1962 Canadian federal election
	Liberal	Léo Cadieux	15,547	39.2	-9.4
	Progressive Conservative	Marcel Deschambault	11,155	28.1	-23.3
	Social Credit	Lucien Bachand	9,269	23.4
	New Democratic	Jean Philip	3,680	9.3
Total valid votes	39,651	100.0

vte1958 Canadian federal election
	Progressive Conservative	Marcel Deschambault	19,319	51.4	+11.5
	Liberal	Raymond Raymond	18,241	48.6	-11.5
Total valid votes	37,560	100.0

vte1957 Canadian federal election
	Liberal	Raymond Raymond	19,515	60.1
	Progressive Conservative	Marcel Deschambault	12,973	39.9
Total valid votes	32,488	100.0

vte1953 Canadian federal election
	Liberal	Lionel Bertrand	acclaimed

vte1949 Canadian federal election
	Liberal	Lionel Bertrand	18,304	66.9	+0.2
	Progressive Conservative	Lucien Thinel	8,107	29.6
	Union des électeurs	Jean-Paul Houle	953	3.5
Total valid votes	27,364	100.0

vte1945 Canadian federal election
	Liberal	Lionel Bertrand	15,383	66.6	+26.9
	Bloc populaire	Henri Dionne	6,726	29.1
	Independent	Charles Aubry	691	3.0
	Co-operative Commonwealth	Louis-Philippe Lebel	281	1.2
Total valid votes	23,081	100.0

vte1940 Canadian federal election
	Independent Liberal	Lionel Bertrand	7,839	44.9
	Liberal	Louis-Étienne Parent	6,938	39.8	-25.3
	National Government	Léopold Lachapelle	2,668	15.3	-11.9
Total valid votes	17,445	100.0

Note: "National Government" vote is compared to Conservative vote in 1935 election.

vte1935 Canadian federal election
	Liberal	Louis-Étienne Parent	9,900	65.1	+8.9
	Conservative	Léopold Nantel	4,141	27.2	-16.6
	Liberal	Eugène Léveillé	1,172	7.7
Total valid votes	15,213	100.0

vte1930 Canadian federal election
	Liberal	Louis-Étienne Parent	8,609	56.1	-19.5
	Conservative	Guillaume-André Fauteux	6,727	43.9	+19.5
Total valid votes	15,336	100.0

vte1926 Canadian federal election
	Liberal	Jules-Édouard Prévost	7,060	75.7	+3.4
	Conservative	Léopold Nantel	2,270	24.3	-3.4
Total valid votes	9,330	100.0

vte1925 Canadian federal election
	Liberal	Jules-Édouard Prévost	6,789	72.2	+1.3
	Conservative	Léopold Nantel	2,609	27.8	-1.3
Total valid votes	9,398	100.0

vte1921 Canadian federal election
	Liberal	Jules-Édouard Prévost	8,882	71.0
	Conservative	Guillaume-André Fauteux	3,636	29.0
Total valid votes	12,518	100.0

vte1917 Canadian federal election
	Opposition (Laurier Liberals)	Jules-Édouard Prévost	acclaimed

Canadian federal by-election, 8 February 1915
	Conservative	Gédéon Rochon	2,193	53.6
	Unknown	Joseph-Alphonse Beaulieu	1,895	46.4
Total valid votes	4,088	100.0
Called upon Mr. Nantel being appointed Railway Commissioner, 20 October 1914.

Column 1	Column 2	Column 3	Column 4
By-election on 27 October 1911
On Mr. Nantel being appointed Minister of Inland Revenue, 10 October 1911
	Conservative	Wilfrid-Bruno Nantel	acclaimed

vte1911 Canadian federal election
	Conservative	Wilfrid Bruno Nantel	2,727	56.5	+5.7
	Liberal	Samuel Desjardins	2,101	43.5	-5.7
Total valid votes	4,828	100.0

vte1908 Canadian federal election
	Conservative	Wilfrid Bruno Nantel	2,592	50.8	+2.7
	Liberal	Thibaudeau Rinfret	2,513	49.2	-2.7
Total valid votes	5,105	100.0

vte1904 Canadian federal election
	Liberal	Samuel Desjardins	2,481	51.9	-1.5
	Conservative	W. Bruno Nantel	2,297	48.1	+1.5
Total valid votes	4,778	100.0

Canadian federal by-election, 24 February 1903
Préfontaine was appointed Minister ofMarine and Fisheries, 11 November 1902
	Liberal	Samuel Desjardins	2,325	53.4	+0.3
	Conservative	A.H. Masson	2,029	46.6	-0.3
Total valid votes	4,354	100.0

vte1900 Canadian federal election
	Liberal	Raymond Préfontaine	2,277	53.1	+4.9
	Conservative	Léon-Adolphe Chauvin	2,010	46.9	-4.9
Total valid votes	4,287	100.0

vte1896 Canadian federal election
	Conservative	Léon-Adolphe Chauvin	1,862	51.8	-10.1
	Liberal	P.F.C. Petit	1,734	48.2	+10.1
Total valid votes	3,596	100.0

Note: popular vote is compared to vote in 1891 general election.

Column 1	Column 2	Column 3	Column 4
By-election on 10 January 1893
Chapleau was appointed Lieutenant-Governorof Quebec, 7 December 1892
	Conservative	Pierre Leclaire	acclaimed

vte1891 Canadian federal election
	Conservative	Joseph-Adolphe Chapleau	1,830	61.9	-1.8
	Liberal	M.D. Limoges	1,126	38.1	+1.8
Total valid votes	2,956	100.0

vte1887 Canadian federal election
	Conservative	Joseph-Adolphe Chapleau	1,819	63.8	-1.8
	Liberal	M.J. Therrien	1,034	36.2
Total valid votes	2,853	100.0

Column 1	Column 2	Column 3	Column 4
By-election on 16 August 1882
To allow Mr. Chapleau to run for office.
	Conservative	Joseph-Adolphe Chapleau	acclaimed

Note: popular vote is compared to vote in 1882 general election.

vte1882 Canadian federal election
	Conservative	Guillaume-Alphonse Nantel	1,593	65.6	-21.3
	Unknown	A.E. Poirier	836	34.4
Total valid votes	2,429	100.0

Note: popular vote is compared to vote in 1878 general election.

Column 1	Column 2	Column 3	Column 4
By-election on 6 November 1878
Masson was appointed Minister ofMilitia and Defence, 19 October 1878
	Conservative	Louis-Rodrigue Masson	acclaimed

vte1878 Canadian federal election
	Conservative	Louis-Rodrigue Masson	1,194	86.8
	Unknown	B. Longpré A	181	13.2
Total valid votes	1,375	100.0

vte1874 Canadian federal election
	Conservative	Louis-Rodrigue Masson	acclaimed
Source: lop.parl.ca

vte1872 Canadian federal election
	Conservative	Louis-Rodrigue Masson	acclaimed
Source: Canadian Elections Database

vte1867 Canadian federal election
	Conservative	Louis-Rodrigue Masson	acclaimed
Source: Canadian Elections Database

List of Canadian electoral districts
Historical federal electoral districts of Canada
Riding history 1867-1996 from the Library of Parliament

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