The list of New Brunswick by-elections includes every by-election held in the Canadian province of New Brunswick. By-elections occur whenever there is a vacancy in the Legislative Assembly, although an imminent general election may allow the vacancy to remain until the dissolution of parliament. Between 1842 and 1927 incumbent members were required to recontest their seats upon being appointed to Cabinet. These Ministerial by-elections were almost always uncontested.
61st New Brunswick Legislature 2024–present By-election Date Incumbent Party Winner Party Cause RetainedMiramichi WestOctober 6, 2025Michael Dawson Progressive ConservativeKevin Russell Progressive ConservativeResigned to run federally in Miramichi—Grand Lake; elected.Yes
60th New Brunswick Legislature 2020–2024 By-election Date Incumbent Party Winner Party Cause RetainedBathurst East-Nepisiguit-Saint-IsidoreApril 24, 2023Denis Landry LiberalSusan Holt LiberalResigned to run for Mayor of Hautes-Terre, elected.YesRestigouche-ChaleurDaniel Guitard LiberalMarco LeBlanc LiberalResigned to run for Mayor of Belle-Baie, elected.YesDieppeRoger Melanson LiberalRichard Losier LiberalResigned.YesSouthwest Miramichi-Bay du VinJune 20, 2022 Jake Stewart Progressive ConservativeMichael Dawson Progressive ConservativeResigned to run federally in Miramichi—Grand Lake; elected.YesMiramichi Bay-NeguacLisa Harris LiberalRéjean Savoie Progressive ConservativeResigned to run federally in Miramichi—Grand Lake; defeated.No
59th New Brunswick Legislature 2018–2020 No by-elections were held during the 59th New Brunswick Legislature's term.
58th New Brunswick Legislature 2014–2018 By-election Date Incumbent Party Winner Party Cause RetainedCarletonOctober 5, 2015 David Alward Progressive ConservativeStewart Fairgrieve Progressive ConservativeResignation to become Consul to BostonYesSaint John EastNovember 17, 2014 Gary Keating LiberalGlen Savoie Progressive ConservativeResignationNo
57th New Brunswick Legislature 2010–2014 By-election Date Incumbent Party Winner Party Cause RetainedKentApril 15, 2013 Shawn Graham LiberalBrian Gallant LiberalResignationYesRothesayJune 25, 2012Margaret-Ann Blaney Progressive ConservativeTed Flemming Progressive ConservativeResignation to become CEO of Efficiency New BrunswickYes
56th New Brunswick Legislature 2006–2010 By-election Date Incumbent Party Winner Party Cause RetainedRestigouche-La-ValléeMarch 9, 2009Percy Mockler Progressive ConservativeBurt Paulin LiberalAppointed to SenateNoNew Maryland-Sunbury WestNovember 3, 2008 Keith Ashfield Progressive ConservativeJack Carr Progressive ConservativeResignation to contest the 2008 Federal ElectionYesMoncton EastMarch 5, 2007Bernard Lord Progressive ConservativeChris Collins LiberalResignationNo
55th New Brunswick Legislature 2003–2006 By-election Date Incumbent Party Winner Party Cause RetainedSaint John HarbourNovember 14, 2005Elizabeth Weir New DemocraticEd Doherty LiberalResignationNoShediac-Cap-PeléOctober 4, 2004Bernard Richard LiberalVictor Boudreau LiberalResignation to become Provincial OmbudsmanYes
54th New Brunswick Legislature 1999–2003 By-election Date Incumbent Party Winner Party Cause RetainedKent SouthApril 23, 2001Camille Thériault LiberalClaude Williams Progressive ConservativeResignationNoCaraquetFebruary 5, 2001Bernard Thériault LiberalGaston Moore Progressive ConservativeResignation to contest the 2000 Federal ElectionNoCampbelltonFebruary 5, 2001Edmond Blanchard LiberalJean F. Dubé Progressive ConservativeAppointed to the Federal Court of CanadaNo
53rd New Brunswick Legislature 1995–1999 By-election Date Incumbent Party Winner Party Cause RetainedMoncton EastOctober 19, 1998Ray Frenette LiberalBernard Lord Progressive ConservativeResignationNoKentAlan R. Graham LiberalShawn Graham LiberalResignationYesFredericton SouthRussell King LiberalBrad Green Progressive ConservativeResignationNoTantramarNovember 17, 1997 Marilyn Trenholme Counsell LiberalPeter Mesheau Progressive ConservativeAppointed Lieutenant GovernorNoMiramichi-Bay du VinFrank McKenna LiberalJames Doyle LiberalResignationYesVictoria-TobiqueJune 23, 1997Larry Kennedy LiberalLarry Kennedy LiberalVoid ElectionYes
52nd New Brunswick Legislature 1991–1995 By-election Date Incumbent Party Winner Party Cause RetainedTracadieSeptember 26, 1994 Denis Losier LiberalElvy Robichaud Progressive ConservativeResignationNoMadawaska SouthNovember 29, 1993Pierrette Ringuette LiberalPercy Mockler Progressive ConservativeResignation to contest the 1993 Federal ElectionNoCarleton NorthJune 28, 1993Fred Harvey LiberalDale Graham Progressive ConservativeResignation following conviction for election fraudNoMoncton NorthFebruary 15, 1993Michael McKee LiberalJohn Lebans LiberalAppointed a judgeYes
51st New Brunswick Legislature 1987–1991 By-election Date Incumbent Party Winner Party Cause RetainedTracadieNovember 14, 1988Doug Young LiberalDenis Losier LiberalResignation to contest the 1988 Federal ElectionYes
50th New Brunswick Legislature 1982–1987 By-election Date Incumbent Party Winner Party Cause RetainedEdmundstonFebruary 10, 1986Jean-Maurice Simard Progressive ConservativeRobert Beaulieu LiberalAppointed to the SenateNoRiverviewApril 29, 1985Brenda Robertson Progressive ConservativeHubert Seamans LiberalAppointed to the SenateNoMadawaska-CentreNovember 26, 1984Gérald Clavette LiberalDonald Marmen Progressive ConservativeResignation to contest the 1984 Federal ElectionNoEast Saint JohnGerald Merrithew Progressive ConservativePeter Trites New DemocraticResignation to contest the 1984 Federal ElectionNo
49th New Brunswick Legislature 1978–1982 By-election Date Incumbent Party Winner Party Cause RetainedBay du VinNovember 5, 1979Norbert Thériault LiberalReginald MacDonald LiberalAppointed to the SenateYes
48th New Brunswick Legislature 1974–1978 By-election Date Incumbent Party Winner Party Cause RetainedVictoria-TobiqueNovember 29, 1976J. Stewart Brooks Progressive ConservativeJ. Douglas Moore Progressive ConservativeResignationYes
47th New Brunswick Legislature 1970–1974 By-election Date Incumbent Party Winner Party Cause RetainedYorkSeptember 30, 1974Harry Ames Progressive ConservativeDavid Bishop Progressive ConservativeDeathYesCampbelltonCharles Van Horne Progressive ConservativeFernand Dubé Progressive ConservativeResignationYesSaint John CentreJune 25, 1973George E. McInerney Progressive ConservativeJohn W. Fernhill LiberalDeathNoSaint John EastDecember 11, 1972Charles A. McIlveen Progressive ConservativeGerald Merrithew Progressive ConservativeDeathYesCharlotteJohn E. Rigby Progressive ConservativeJames N. Tucker, Jr. Progressive ConservativeDeathYesBathurstH. H. Williamson LiberalEugene McGinley LiberalDeathYesGloucesterSeptember 18, 1972Bernard Jean LiberalLorenzo Morais Progressive ConservativeResignationNoKentOctober 1, 1971Louis Robichaud LiberalOmer Léger Progressive ConservativeResignationNo
46th New Brunswick Legislature 1967–1970 By-election Date Incumbent Party Winner Party Cause RetainedNorthumberlandJune 16, 1969J. L. A. Savoie LiberalFrank E. Kane LiberalDeathYesRestigoucheNovember 4, 1968J.M. Joffre Daigle LiberalCharles Van Horne Progressive ConservativeDeathNoFredericton CityJune 10, 1968John F. McInerney Progressive ConservativeLawrence Garvie Progressive ConservativeDeathYes
45th New Brunswick Legislature 1963–1967 By-election Date Incumbent Party Winner Party Cause RetainedRestigoucheFebruary 6, 1967Georges Dumont LiberalCharles Van Horne Progressive ConservativeDeathNoSaint John CitySeptember 12, 1966Daniel Aloysius Riley LiberalStephen Weyman LiberalResignationYesWestmorlandSeptember 27, 1965Donald C. Harper LiberalW. Wynn Meldrum LiberalDeathYesKentMarch 16, 1964Hugh A. Dysart LiberalCamille Bordage LiberalDeathYes
44th New Brunswick Legislature 1960–1963 By-election Date Incumbent Party Winner Party Cause RetainedKingsDecember 3, 1962Gordon Fairweather Progressive ConservativeJohn B. M. Baxter, Jr. Progressive ConservativeResignation to contest the 1962 Federal ElectionYesHarry N. Jonah Progressive ConservativeGeorge E. Horton Progressive ConservativeAppointed a judgeYesNorthumberlandJune 19, 1961Paul B. Lordon LiberalJ. Fraser Kerr LiberalResignationYesCarletonHugh John Flemming Progressive ConservativeRichard Hatfield Progressive ConservativeResignation to contest a federal by-electionYes
43rd New Brunswick Legislature 1956–1960 no by-elections
42nd New Brunswick Legislature 1952–1956 no by-elections
41st New Brunswick Legislature 1948–1952 By-election Date Incumbent Party Winner Party Cause RetainedCharlotteJanuary 9, 1950James Joseph Hayes Doone Liberal William N. Campbell LiberalAppointed to the SenateYes
40th New Brunswick Legislature 1944–1948 By-election Date Incumbent Party Winner Party Cause RetainedSaint John CountyJuly 30, 1945Alphonso Colby Smith Progressive ConservativeEdward Claude Seeley IndependentDeathNoRestigoucheJuly 30, 1945†Benoît Michaud LiberalJean-Baptiste D'Astous LiberalResignation to contest the 1945 Federal ElectionYesGloucesterJuly 30, 1945†Clovis-Thomas Richard LiberalJ. Michel Fournier LiberalResignation to contest the 1945 Federal ElectionYesVictoriaMay 21, 1945†Frederick William Pirie LiberalMichael F. McCloskey LiberalAppointed to the SenateYes † Won by acclamation
39th New Brunswick Legislature 1939–1944 By-election Date Incumbent Party Winner Party Cause RetainedGloucesterAugust 19, 1940†Frederick T. B. Young LiberalJoseph E. Connolly LiberalDeathYesKentMarch 27, 1940†Allison Dysart LiberalJ. Killeen McKee LiberalAppointed a judgeYesVictoriaJanuary 24, 1940John W. Niles LiberalJohn B. McNair LiberalResignation to provide a seat for McNairYes † Won by acclamation
38th New Brunswick Legislature 1935–1939 no by-elections
37th New Brunswick Legislature 1930–1935 By-election Date Incumbent Party Winner Party Cause RetainedGloucesterOctober 26, 1931John P. Lordon LiberalWesley H. Coffyn ConservativeDeathNoSaint John CountyJune 29, 1931John Babington Macaulay Baxter ConservativeRobert McAllister ConservativeAppointed Chief Justice of New BrunswickYesWestmorlandOctober 7, 1930†Melville A. Oulton ConservativeLewis Smith ConservativeAppointed Medical Officer of the New Brunswick Worker's Compensation BoardYes † Won by acclamation
36th New Brunswick Legislature 1925–1930