Statistics on by-elections held since 1970
Summary
Since 1970, there have been 114 by-elections and one cancelled election.
| Year | Date | Electoral division | Elected candidate | Number of registered voters | Number of valid ballots | Number of rejected ballots | Voter turnout (%) |
|---|---|---|---|---|---|---|---|
| 2026 | February 23 | Chicoutimi | Marie-Karlynn Laflamme (PQ) |
45,778 | 15,432 | 231 | 34.22 |
| 2025 | August 11 | Arthabaska | Alex Boissonneault (PQ) |
62,960 | 37,365 | 398 | 59.98 |
| 2025 | March 17 | Terrebonne | Catherine Gentilcore (PQ) |
61,451 | 22,622 | 293 | 37.29 |
| 2023 | October 2 | Jean-Talon | Pascal Paradis (PQ) |
46,941 | 25,684 | 251 | 55.25 |
| 2023 | March 13 | Saint-Henri–Sainte-Anne | Guillaume Cliche-Rivard (QS) |
57,492 | 17,747 | 133 | 31.10 |
| 2022 | April 11 | Marie-Victorin | Shirley Dorismond (CAQ-EFL) |
45,636 | 16,299 | 188 | 36.13 |
| 2019 | December 2 | Jean-Talon | Joëlle Boutin (CAQ-EFL) |
46,857 | 22,936 | 109 | 49.18 |
| 2018 | December 10 | Roberval | Nancy Guillemette (CAQ-EFL) |
44,509 | 15,354 | 85 | 34.69 |
| 2017 | October 2 | Louis-Hébert | Geneviève Guilbault (CAQ-EFL) |
45,540 | 23,690 | 190 | 52.44 |
| 2017 | May 29 | Gouin | Gabriel Nadeau-Dubois (QS) |
44,185 | 14,245 | 243 | 32.79 |
| 2016 | December 5 | Arthabaska | Éric Lefebvre (CAQ-EFL) |
60,285 | 25,744 | 265 | 43.14 |
| 2016 | December 5 | Marie-Victorin | Catherine Fournier (PQ) |
47,267 | 12,005 | 147 | 25.71 |
| 2016 | December 5 | Saint-Jérôme | Marc Bourcier (PQ) |
58,973 | 19,785 | 235 | 33.95 |
| 2016 | December 5 | Verdun | Isabelle Mélançon (PLQ/QLP) |
49,758 | 14,365 | 138 | 29.15 |
| 2016 | April 11 | Chicoutimi | Mireille Jean (PQ) |
46,630 | 18,858 | 305 | 41.10 |
| 2015 | November 9 | Beauce-Sud | Paul Busque (PLQ/QLP) |
48,587 | 19,147 | 195 | 39.81 |
| 2015 | November 9 | Fabre | Monique Sauvé (PLQ/QLP) |
50,074 | 11,450 | 82 | 23.03 |
| 2015 | November 9 | René-Lévesque | Martin Ouellet (PQ) |
34,008 | 13,363 | 102 | 39.59 |
| 2015 | November 9 | Saint-Henri–Sainte-Anne | Dominique Anglade (PLQ/QLP) |
58,171 | 13,760 | 115 | 23.85 |
| 2015 | June 8 | Chauveau | Véronyque Tremblay (PLQ/QLP) |
58,501 | 10,385 | 222 | 43.29 |
| 2015 | June 8 | Jean-Talon | Sébastien Proulx (PLQ/QLP) |
45,475 | 8,214 | 161 | 43.61 |
| 2015 | March 9 | Richelieu | Sylvain Rochon (PQ) |
44,356 | 7,294 | 318 | 46.41 |
| 2014 | October 20 | Lévis | François Paradis (CAQ-EFL) |
47,006 | 10,110 | 165 | 46.31 |
| 2013 | December 9 | Outremont | Philippe Couillard (PLQ) |
38,671 | 10,128 | 89 | 26.42 |
| 2013 | December 9 | Viau | David Heurtel (PLQ) |
40,518 | 6,757 | 101 | 16.93 |
| 2012 | June 11 | Argenteuil | Roland Richer (PQ) |
43,441 | 18,228 | 225 | 42.48 |
| 2012 | June 11 | LaFontaine | Marc Tanguay (P.L.Q./Q.L.P) |
40,679 | 10,206 | 183 | 25.54 |
| 2011 | December 5 | Bonaventure | Damien Arsenault (PLQ) |
29,510 | 15,946 | 154, | 54.56 |
| 2010 | November 29 | Kamouraska-Témiscouata | André Simard (PQ) |
34,470 | 19,575, | 296, | 57.65 |
| 2010 | September 13 | Saint-Laurent | Jean-Marc Fournier (PLQ) |
52,186 | 11,132 | 166 | 21.65 |
| 2010 | July 5 | Vachon | Martine Ouellet (PQ) |
46,046 | 13,293 | 174 | 29.25 |
| 2009 | June 22 | Marguerite-Bourgeoys | Clément Gignac (PLQ) |
46,478 | 10,707 | 87 | 23.22 |
| 2009 | June 22 | Rivière-du-Loup | Jean D’Amour (PLQ) |
34,219 | 20,972 | 119 | 61.64 |
| 2009 | September 21 | Rousseau | Nicolas Marceau (PQ) |
55,979 | 16,708 | 216 | 30.23 |
| 2008 | May 12 | Bourget | Maka Kotto (PQ) |
47,276 | 16,171 | 162 | 34.55 |
| 2008 | May 12 | Hull | Maryse Gaudreault (PLQ) |
48,335 | 16,376 | 128 | 34.15 |
| 2008 | May 12 | Pointe-aux-Trembles | Nicole Léger (PQ) |
40,496 | 13,675 | 146 | 34.13 |
| 2008 | September 29 | Jean-Talon | Yves Bolduc (PLQ) |
40,434 | 20,583 | 111 | 51.18 |
| 2007 | September 24 | Charlevoix | Pauline Marois (PQ) |
33,174 | 19,256 | 163 | 58.54 |
| 2006 | April 10 | Sainte-Marie–Saint-Jacques | Martin Lemay (PQ) |
42,437 | 13,255 | 101 | 31.47 |
| 2006 | August 14 | Pointe-aux-Trembles | André Boisclair (PQ) |
40,516 | 12,793 | 315 | 32.35 |
| 2006 | August 14 | Taillon | Marie Malavoy (PQ) |
55,303 | 19,068 | 197 | 34.84 |
| 2005 | December 12 | Outremont | Raymond Bachand (PLQ) |
41,799 | 16,749 | 89 | 40.28 |
| 2005 | December 12 | Verchères | Stéphane Bergeron (PQ) |
42,401 | 18,957 | 171 | 45.11 |
| 2004 | September 20 | Gouin | Nicolas Girard (PQ) |
43,858 | 14,989 | 123 | 34.46 |
| 2004 | September 20 | Laurier-Dorion | Elsie Lefebvre (PQ) |
47,107 | 16,430 | 171 | 35.24 |
| 2004 | September 20 | Nelligan | Yolande James (PLQ) |
52,163 | 14,856 | 62 | 28.60 |
| 2004 | September 20 | Vanier | Sylvain Légaré (ADQ/ÉMD) |
50,547 | 23,864 | 173 | 47.55 |
| 2002 | April 15 | Anjou | Lise Thériault (PLQ) |
35,134 | 16,203 | 178 | 46.62 |
| 2002 | April 15 | Saguenay | François Corriveau (ADQ/ÉMD) |
35,378 | 21,172 | 199 | 60.41 |
| 2002 | April 15 | Viger | Anna Mancuso (PLQ) |
36,744 | 11,560 | 166 | 31.91 |
| 2002 | June 17 | Berthier | Marie Grégoire (ADQ/ÉMD) |
49,941 | 32,133 | 515 | 65.37 |
| 2002 | June 17 | Joliette | Sylvie Lespérance (ADQ/ÉMD) |
46,551 | 28,570 | 823 | 63.14 |
| 2002 | June 17 | Lac-Saint-Jean | Stéphan Tremblay (PQ) |
41,090 | 25,111 | 280 | 61.79 |
| 2002 | June 17 | Vimont | François Gaudreau (ADQ/ÉMD) |
57,961 | 30,475 | 304 | 53.10 |
| 2001 | April 9 | Mercier | Nathalie Rochefort (PLQ) |
42,651 | 17,174 | 352 | 41.09 |
| 2001 | October 1 | Blainville | Richard Legendre (PQ) |
46,581 | 22,319 | 309 | 48.58 |
| 2001 | October 1 | Jonquière | Françoise Gauthier (PLQ) |
44,716 | 28,101 | 273 | 63.45 |
| 2001 | October 1 | Labelle | Sylvain Pagé (PQ) |
41,002 | 22,454 | 317 | 55.54 |
| 2001 | October 1 | Laviolette | Julie Boulet (PLQ) |
34,445 | 21,591 | 317 | 63.60 |
| 1998 | June 1 | Argenteuil | David Whissel (PLQ) |
48,340 | 23,764 | 410 | 50.01 |
| 1997 | April 28 | Beauce-Sud | Diane Leblanc (PLQ) |
41,284 | 27,253 | 432 | 67.06 |
| 1997 | April 28 | Prévost | Lucie Papineau (PQ) |
46,261 | 21,820 | 571 | 48.40 |
| 1997 | October 6 | Bertrand | Denis Chalifoux (PLQ) |
41,178 | 21,605 | 403 | 53.45 |
| 1997 | October 6 | Bourassa | Michèle Lamquin-Ethier (PLQ) |
31,227 | 14,442 | 305 | 47.23 |
| 1997 | October 6 | Duplessis | Normand Duguay (PQ) |
36,548 | 17,350 | 337 | 48.39 |
| 1997 | October 6 | Kamouraska-Témiscouata | Claude Béchard (PLQ) |
34,076 | 19,145 | 351 | 57.21 |
| 1996 | February 19 | Jonquière | Lucien Bouchard (PQ) |
43,614 | 26,261 | 341 | 60.99 |
| 1996 | February 19 | La Prairie | Monique Simard (PQ) |
53,079 | 29,204 | 305 | 55.59 |
| 1996 | June 10 | L’Assomption | Jean-Claude St-André (PQ) |
48,626 | 23,372 | 440 | 48.97 |
| 1996 | June 10 | Outremont | Pierre-Etienne Laporte (PLQ) |
42,354 | 14,416 | 173 | 34.45 |
| 1996 | December 9 | Pointe-aux-Trembles | Nicole Léger (PQ) |
38,313 | 15,287 | 333 | 40.77 |
| 1994 | February 21 | Bonaventure | Marcel Landry (PQ) |
27,689 | 21,496 | 338 | 78.85 |
| 1994 | February 28 | Shefford | Bernard Brodeur (PLQ) |
45,662 | 22,480 | 651 | 50.66 |
| 1993 | July 5 | Portneuf | Roger Bertrand (PQ) |
34,085 | 20,778 | 455 | 62.29 |
| 1993 | December 13 | Laval-des-Rapides | Serge Ménard (PQ) |
35,961 | 13,829 | 160 | 38.90 |
| 1992 | January 20 | Anjou | Pierre Bélanger (PQ) |
29,043 | 16,531 | 213 | 57.65 |
| 1991 | August 12 | Montmorency | Jean Filion (PQ) |
46,318 | 25,003 | 595 | 55.27 |
| 1989 | May 29 | Hull | Robert Lesage (PLQ) |
39,544 | 13,733 | 291 | 35.46 |
| 1989 | May 29 | Papineau | Norman MacMillan (PLQ) |
29,845 | 14,868 | 154 | 50.33 |
| 1988 | June 20 | Anjou | René Serge Larouche (PLQ) |
42,202 | 21,575 | 207 | 51.61 |
| 1988 | June 20 | Roberval | Gaston Blackburn (PLQ) |
40,490 | 26,045 | 227 | 64.89 |
| 1987 | September 14 | Notre-Dame-de-Grâce | Harold Peter Thuringer (PLQ) | 32,820 | 13,898 | 208 | 42.98 |
| 1986 | January 20 | Saint-Laurent | Robert Bourassa (PLQ) |
42,514 | 19,372 | 266 | 46.19 |
| 1985 | June 3 | Bertrand | Robert Bourassa (PLQ) |
39,776 | 26,723 | 567 | 68.61 |
| 1985 | June 3 | Bourget | Claude Trudel (PLQ) |
33,788 | 15,228 | 326 | 46.03 |
| 1985 | June 3 | L’Assomption | Jean-Guy Gervais (PLQ) |
48,148 | 25,733 | 789 | 55.08 |
| 1985 | June 3 | Trois-Rivières | Paul Philibert (PLQ) |
39,381 | 21,386 | 472 | 55.50 |
| 1984 | June 18 | Marguerite-Bourgeoys | Gilles Fortin (PLQ) |
34,030 | 15,671 | 248 | 46.78 |
| 1984 | June 18 | Marie-Victorin | Guy Pratt (PLQ) |
35,584 | 19,657 | 421 | 56.42 |
| 1984 | June 18 | Sauvé | Marcel Parent (PLQ) |
36,022 | 16,457 | 352 | 46.66 |
| 1984 | November 26 | Saint-Jacques | Jean-François Viau (PLQ) |
32,414 | 16,060 | 356 | 50.64 |
| 1983 | June 20 | Charlesbourg | Marc-Yvan Côté (PLQ) |
41,208 | 25,102 | 454 | 62.02 |
| 1983 | June 20 | Saguenay | Ghislain Maltais (PLQ) |
35,366 | 21,636 | 309 | 62.05 |
| 1983 | June 20 | Saint-Jacques | Serge Champagne (PLQ) |
30,552 | 15,629 | 345 | 52.28 |
| 1983 | December 5 | Jonquière | Aline St-Amand (PLQ) |
42,725 | 31,366 | 751 | 75.17 |
| 1983 | December 5 | Mégantic-Compton | Madeleine Bélanger (PLQ) |
28,270 | 20,282 | 194 | 72.43 |
| 1982 | April 5 | Louis-Hébert | Réjean Doyon (PLQ) |
38,176 | 23,971 | 637 | 64.46 |
| 1982 | April 5 | Saint-Laurent | Germain Leduc (PLQ) |
39,852 | 21,618 | 355 | 55.14 |
| 1980 | November 17 | Brome-Missisquoi | Pierre Paradis (PLQ) |
31,342 | 21,249 | 154 | 68.29 |
| 1980 | November 17 | Johnson | Camille Picard (PLQ) |
32,353 | 22,359 | 156 | 69.59 |
| 1980 | November 17 | Mégantic-Compton | Fabien Bélanger (PLQ) |
28,222 | 19,719 | 144 | 70.38 |
| 1980 | November 17 | Outremont | Pierre C. Fortier (PLQ) |
39,072 | 18,808 | 248 | 48.77 |
| 1979 | April 30 | Argenteuil | Claude Ryan (PLQ) |
34,610 | 25,777 | 1,295 | 78.22 |
| 1979 | April 30 | Jean-Talon | Jean-Claude Rivest (PLQ) |
32,523 | 25,411 | 816 | 80.64 |
| 1979 | November 14 | Beauce-Sud | Hermann Mathieu (PLQ) |
33,459 | 26,948 | 557 | 82.21 |
| 1979 | November 14 | Maisonneuve | Georges Lalande (PLQ) |
29,066 | 20,212 | 596 | 71.59 |
| 1979 | November 14 | Prévost | Solange Chaput-Rolland (PLQ) |
53,771 | 40,783 | 1,145 | 77.98 |
| 1979 | November 26 | D’Arcy-McGee | Herbert Marx (PLQ) |
41,201 | 23,106 | 301 | 56.81 |
| 1978 | July 5 | Notre-Dame-de-Grâce | Reed Scowen (PLQ) |
33,414 | 20,565 | 436 | 62.85 |
| 1974 | August 28 | Johnson | Maurice Bellemare (UN) |
27,183 | 19,090 | 328 | 71.43 |
| 1972 | October 11 | Duplessis | Donald Gallienne (PLQ) |
26,663 | 19,510 | 473 | 74.95 |
| 1972 | October 11 | Gatineau | Élection annulée | ||||
| 1972 | November 15 | New by-election in Gatineau | Michel Gratton (PLQ) |
43,083 | 21,311 | 548 | 50.74 |
| 1971 | February 8 | Chambly | Jean Cournoyer (PLQ) |
52,795 | 35,073 | 928 | 68.19 |