List of Ontario by-elections

The list of Ontario by-elections includes every by-election held in the Canadian province of Ontario. 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.

Causes

A by-election occurs whenever there is a vacancy in the Ontario legislature. Vacancies can occur for the following reasons:

  • Death of a member.
  • Resignation of a member.
  • Voided results
  • Expulsion from the legislature.
  • Ineligibility to sit.

When there is a vacancy, a by-election must be called within six months. Under amendments to the Election Act approved in 2016, a by-election is no longer required when a vacancy occurs in the 12 months leading up to a fixed general election date.

Ministerial by-elections

The list includes ministerial by-elections which occurred due to the requirement that incumbent members recontest their seats upon being appointed to Cabinet. These by-elections were almost always uncontested. This requirement was amended in 1926 to exempt ministers appointed within three months after a general election. In 1941 it was abolished completely.

43rd Legislative Assembly of Ontario 2022–present

See also: 43rd Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Bay of Quinte September 19, 2024 Todd Smith      Progressive Conservative Tyler Allsopp      Progressive Conservative Resigned to return to the private sector. Yes
Milton May 2, 2024 Parm Gill      Progressive Conservative Zee Hamid      Progressive Conservative Resigned to run for a seat in the House of Commons Yes
Lambton—Kent—Middlesex May 2, 2024 Monte McNaughton      Progressive Conservative Steve Pinsonneault      Progressive Conservative Resigned to return to the private sector Yes
Kitchener Centre November 30, 2023 Laura Mae Lindo     New Democratic Aislinn Clancy     Green Resigned to take up role at University of Waterloo. No
Scarborough—Guildwood July 27, 2023 Mitzie Hunter     Liberal Andrea Hazell     Liberal Resigned to run for Mayor of Toronto, lost. Yes
Kanata—Carleton July 27, 2023 Merrilee Fullerton      Progressive Conservative Karen McCrimmon     Liberal Resigned. No
Hamilton Centre March 16, 2023 Andrea Horwath     New Democratic Sarah Jama     New Democratic Resigned to run for Mayor of Hamilton, elected. Yes

42nd Legislative Assembly of Ontario 2018–2022

See also: 42nd Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Ottawa—Vanier February 27, 2020 Nathalie Des Rosiers     Liberal Lucille Collard     Liberal Resigned to become Principal of Massey College Yes
Orléans February 27, 2020 Marie-France Lalonde     Liberal Stephen Blais     Liberal Resigned to run in the federal district of Orléans; elected. Yes

41st Legislative Assembly of Ontario 2014–2018

See also: 41st Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Sault Ste. Marie June 1, 2017 David Orazietti      Liberal Ross Romano      Progressive Conservative Resignation. No
Niagara West—Glanbrook November 17, 2016 Tim Hudak      Progressive Conservative Sam Oosterhoff      Progressive Conservative Resignation to become CEO of Ontario Real Estate Association. Yes
Ottawa—Vanier November 17, 2016 Madeleine Meilleur      Liberal Nathalie Des Rosiers      Liberal Resignation. Yes
Scarborough—Rouge River September 1, 2016 Bas Balkissoon      Liberal Raymond Cho      Progressive Conservative Resignation. No
Whitby—Oshawa February 11, 2016 Christine Elliott      Progressive Conservative Lorne Coe      Progressive Conservative Resigned after losing leadership contest. Yes
Simcoe North September 3, 2015 Garfield Dunlop      Progressive Conservative Patrick Brown      Progressive Conservative Resignation to create a vacancy for PC leader Brown. Yes
Sudbury February 5, 2015 Joe Cimino      New Democratic Glenn Thibeault      Liberal Resignation. No

40th Legislative Assembly of Ontario 2011–2014

See also: 40th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Thornhill February 13, 2014 Peter Shurman     Progressive Conservative Gila Martow     Progressive Conservative Resignation Yes
Niagara Falls February 13, 2014 Kim Craitor     Liberal Wayne Gates     New Democratic Resignation No
Scarborough—Guildwood August 1, 2013 Margarett Best     Liberal Mitzie Hunter     Liberal Resignation Yes
Etobicoke—Lakeshore August 1, 2013 Laurel Broten     Liberal Doug Holyday     Progressive Conservative Resignation No
Ottawa South August 1, 2013 Dalton McGuinty     Liberal John Fraser     Liberal Resignation to re-enter private life after retiring as Premier and Liberal leader. Yes
Windsor—Tecumseh August 1, 2013 Dwight Duncan     Liberal Percy Hatfield     New Democratic Resignation following the retirement of Premier McGuinty No
London West August 1, 2013 Chris Bentley     Liberal Peggy Sattler     New Democratic Resignation following the retirement of Premier McGuinty No
Kitchener—Waterloo September 6, 2012 Elizabeth Witmer     Progressive Conservative Catherine Fife     New Democratic Resignation to accept appointment as Chair of the Workplace Safety & Insurance Board No
Vaughan September 6, 2012 Greg Sorbara     Liberal Steven Del Duca     Liberal Resignation Yes

39th Legislative Assembly of Ontario 2007–2011

See also: 39th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Ottawa West—Nepean March 4, 2010 Jim Watson      Liberal Bob Chiarelli      Liberal Resignation to run for Mayor of Ottawa Yes
Leeds—Grenville March 4, 2010 Robert Runciman     Progressive Conservative Steve Clark     Progressive Conservative Resignation upon appointment to Canadian Senate. Yes
Toronto Centre February 4, 2010 George Smitherman      Liberal Glen Murray      Liberal Resignation to run for Mayor of Toronto. Yes
St. Paul's September 17, 2009 Michael Bryant      Liberal Eric Hoskins      Liberal Resignation to accept municipal appointment. Yes
Haliburton—Kawartha Lakes—Brock March 5, 2009 Laurie Scott     Progressive Conservative Rick Johnson      Liberal Resignation to create vacancy for PC leader John Tory. No

38th Legislative Assembly of Ontario 2003–2007

See also: 38th Parliament of Ontario
See also: 2007 Ontario provincial by-elections
By-election Date Incumbent Party Winner Party Cause Retained
Burlington February 8, 2007 Cam Jackson     Progressive Conservative Joyce Savoline     Progressive Conservative Resignation to run for Mayor of Burlington Yes
York South—Weston February 8, 2007 Joe Cordiano      Liberal Paul Ferreira     New Democratic Resignation No
Markham February 8, 2007 Tony Wong      Liberal Michael Chan      Liberal Resignation to run municipally. Yes
Parkdale—High Park September 14, 2006 Gerard Kennedy      Liberal Cheri DiNovo     New Democratic Resignation to seek federal Liberal leadership. No
Whitby—Ajax March 30, 2006 Jim Flaherty     Progressive Conservative Christine Elliott     Progressive Conservative Resignation to run federally. Yes
Toronto—Danforth March 26, 2006 Marilyn Churley      New Democratic Peter Tabuns      New Democratic Resignation to run federally. Yes
Nepean—Carleton March 26, 2006 John Baird     Progressive Conservative Lisa MacLeod     Progressive Conservative Resignation to run federally. Yes
Scarborough—Rouge River November 24, 2005 Alvin Curling      Liberal Bas Balkissoon      Liberal Resignation to accept diplomatic posting. Yes
Dufferin—Peel—Wellington—Grey March 17, 2005 Ernie Eves     Progressive Conservative John Tory     Progressive Conservative Resignation. Yes
Hamilton East May 13, 2004 Dominic Agostino      Liberal Andrea Horwath     New Democratic Death No

37th Legislative Assembly of Ontario 1999–2003

See also: 37th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Dufferin—Peel—Wellington—Grey May 2, 2002 David Tilson     Progressive Conservative Ernie Eves     Progressive Conservative Resignation to create vacancy for PC leader and Premier Ernie Eves. Yes
Nipissing May 2, 2002 Mike Harris     Progressive Conservative Al McDonald     Progressive Conservative Resignation after retiring as Premier and party leader. Yes
Beaches-East York September 20, 2001 Frances Lankin     New Democratic Michael Prue     New Democratic Resignation to become CEO of United Way Toronto Yes
Vaughan—King—Aurora June 28, 2001 Al Palladini     Progressive Conservative Greg Sorbara      Liberal Death No
Parry Sound—Muskoka March 22, 2001 Ernie Eves     Progressive Conservative Norm Miller     Progressive Conservative Resignation Yes
Wentworth-Burlington September 7, 2000 Toni Skarica     Progressive Conservative Ted McMeekin      Liberal Resignation to protest municipal amalgamation. No

36th Legislative Assembly of Ontario 1995–1999

See also: 36th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Nickel Belt October 1, 1998 Floyd Laughren     New Democratic Blain Morin     New Democratic Resignation to accept appointment as chair of Ontario Energy Board Yes
Oriole September 4, 1997 Elinor Caplan      Liberal David Caplan      Liberal Resignation to enter federal politics Yes
Ottawa West September 4, 1997 Bob Chiarelli      Liberal Alex Cullen      Liberal Resignation to run municipally Yes
Windsor—Riverside September 4, 1997 Dave Cooke     New Democratic Wayne Lessard     New Democratic Resignation to accept provincial appointment to the Education Improvement Commission. Yes
York South May 23, 1996 Bob Rae     New Democratic Gerard Kennedy      Liberal Resignation. No

35th Legislative Assembly of Ontario 1990–1995

See also: 35th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Victoria—Haliburton March 17, 1994 Dennis Drainville     Independent Chris Hodgson     Progressive Conservative Resignation to run federally. No
Essex South December 2, 1993 Remo Mancini      Liberal Bruce Crozier      Liberal Resignation Yes
St. George—St. David April 1, 1993 Ian Scott      Liberal Tim Murphy      Liberal Resignation Yes
Don Mills April 1, 1993 Margery Ward     New Democratic David Johnson     Progressive Conservative Death No
Brant—Haldimand March 5, 1992 Robert Nixon      Liberal Ronald Eddy      Liberal Resignation to accept federal appointment. Yes

34th Legislative Assembly of Ontario 1987–1990

See also: 34th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Welland—Thorold November 3, 1988 Mel Swart     New Democratic Peter Kormos     New Democratic Resignation. Yes
London North March 31, 1988 Ron Van Horne      Liberal Dianne Cunningham     Progressive Conservative Resignation. No

33rd Legislative Assembly of Ontario 1985–1987

See also: 33rd Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Cochrane North August 14, 1986 René Fontaine      Liberal René Fontaine      Liberal Resignation from cabinet and legislature to resubmit candidacy to voters after it was revealed he had forgotten to disclose his ownership of shares in a mining company contrary to conflict of interest guidelines. Yes
York East April 17, 1986 Robert Elgie     Progressive Conservative Christine Hart      Liberal Resignation to accept appointment as head of Workers Compensation Board. No

32nd Legislative Assembly of Ontario 1981–1985

See also: 32nd Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Wentworth North December 13, 1984 Eric Cunningham      Liberal Ann Sloat     Progressive Conservative Resignation to run federally. No
Prescott and Russell December 13, 1984 Don Boudria      Liberal Jean Poirier      Liberal Resignation to run federally. Yes
Ottawa East December 13, 1984 Albert J. Roy      Liberal Bernard Grandmaître      Liberal Resignation to run federally. Yes
Ottawa Centre December 13, 1984 Michael Cassidy     New Democratic Evelyn Gigantes     New Democratic Resignation to run federally. Yes
Hamilton Centre December 13, 1984 Sheila Copps      Liberal Mike Davison     New Democratic Resignation to run federally. No
Stormont—Dundas—Glengarry December 15, 1983 Osie Villeneuve     Progressive Conservative Noble Villeneuve     Progressive Conservative Death Yes
York South November 4, 1982 Donald C. MacDonald     New Democratic Bob Rae     New Democratic Resignation to create vacancy for NDP leader Bob Rae. Yes
Hamilton West June 17, 1982 Stuart Smith      Liberal Richard Allen     New Democratic Resignation from legislature after his successor as Liberal leader was chosen. No

31st Legislative Assembly of Ontario 1977–1981

See also: 31st Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Carleton November 20, 1980 Sid Handleman     Progressive Conservative Robert C. Mitchell     Progressive Conservative Resignation Yes
Scarborough West April 5, 1979 Stephen Lewis     New Democratic Richard Johnston     New Democratic Resignation several months after his successor as Ontario NDP leader was chosen. Yes
Wentworth April 5, 1979 Ian Deans     New Democratic Colin Isaacs     New Democratic Resignation after being defeated in his candidacy to lead the Ontario NDP. Yes
Sault Ste. Marie December 14, 1978 John Rhodes     Progressive Conservative Russ Ramsay     Progressive Conservative Death. Yes
Chatham—Kent October 19, 1978 Darcy McKeough     Progressive Conservative Andrew Naismith Watson     Progressive Conservative Resignation. Yes

30th Legislative Assembly of Ontario 1975–1977

See also: 30th Parliament of Ontario

no by-elections

29th Legislative Assembly of Ontario 1971–1975

See also: 29th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Carleton East November 7, 1974 Bert Lawrence     Progressive Conservative Paul Frederick Taylor     Liberal Resignation. No
Stormont October 17, 1974 Fernand Guindon     Progressive Conservative George Samis     New Democratic Resignation to run federally. No
Huron March 15, 1973 Charles MacNaughton     Progressive Conservative Jack Riddell     Liberal Resignation. No
St. George March 15, 1973 Allan Lawrence     Progressive Conservative Margaret Campbell     Liberal Resignation to enter federal politics. No

28th Legislative Assembly of Ontario 1967–1971

See also: 28th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Middlesex South September 18, 1969 Neil Leverne Olde     Progressive Conservative Kenneth Charles Bolton     New Democratic Death. No

27th Legislative Assembly of Ontario 1963–1967

See also: 27th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Kenora September 22, 1966 Robert Wayne Gibson     Liberal-Labour Leo Bernier     Progressive Conservative Death No
Nipissing September 15, 1965 Leo Troy     Liberal Richard Smith     Liberal Death Yes
Bracondale September 15, 1965 Joseph M. Gould     Liberal George Ben     Liberal Death Yes
Riverdale September 10, 1964 Robert Macaulay     Progressive Conservative Jim Renwick     New Democratic Resigned to return to private life No
Windsor—Sandwich September 10, 1964 Maurice Belanger     Liberal Ivan Thrasher     Progressive Conservative Death[1] No

26th Legislative Assembly of Ontario 1959–1963

See also: 26th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Huron—Bruce October 4, 1962 John William Hanna     Progressive Conservative Murray Gaunt     Liberal Death No
Beaches January 18, 1962 William Henry Collings     Progressive Conservative Robert John Harris     Progressive Conservative Death Yes
Brant January 18, 1962 Harry Nixon     Liberal Robert Nixon     Liberal Death Yes
Eglinton January 18, 1962 William James Dunlop     Progressive Conservative Leonard Mackenzie Reilly     Progressive Conservative Death Yes
Kenora January 18, 1962 Albert Wren     Liberal-Labour Robert Wayne Gibson     Liberal Death Yes
Renfrew South January 18, 1962 James Anthony Maloney     Progressive Conservative Leonard Joseph Quilty     Liberal Death No
Simcoe Centre September 29, 1960 George Graham Johnston     Progressive Conservative David Arthur Evans     Progressive Conservative Death Yes
Timiskaming September 29, 1960 Alexander Robert Herbert     Progressive Conservative Phillip Hoffman     Progressive Conservative Death Yes

25th Legislative Assembly of Ontario 1955–1959

See also: 25th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Hastings East August 28, 1958† Roscoe Robson     Progressive Conservative Lloyd Harrison Price     Progressive Conservative[2] Appointed Sheriff Yes
Lanark August 28, 1958† John Arthur McCue     Progressive Conservative George Gomme     Progressive Conservative Death Yes
Cochrane North May 12, 1958 Philip Timothy Kelly     Progressive Conservative René Brunelle     Progressive Conservative Resignation Yes
Huron May 12, 1958 Thomas Pryde     Progressive Conservative Charles MacNaughton     Progressive Conservative Death Yes
Renfrew North May 12, 1958 Stanley Joseph Hunt     Progressive Conservative Maurice Hamilton     Progressive Conservative Resigned to enter federal politics Yes
St. George May 12, 1958 Dana Porter     Progressive Conservative Allan Lawrence     Progressive Conservative Appointed Chief Justice of the Ontario Court of Appeal Yes
Elgin January 30, 1958 Fletcher Stewart Thomas     Progressive Conservative Ron McNeil     Progressive Conservative Death Yes
Lanark October 24, 1957 George Doucett     Progressive Conservative John Arthur McCue     Progressive Conservative Resigned to enter federal politics Yes
Glengarry September 5, 1957 Osie Villeneuve     Progressive Conservative Fernand Guindon     Progressive Conservative Resigned to enter federal politics Yes
Middlesex North September 5, 1957 Thomas L. Patrick     Progressive Conservative William Atcheson Stewart     Progressive Conservative Death Yes
York West October 18, 1956 W. Elmer Brandon     Progressive Conservative Leslie Rowntree     Progressive Conservative Death Yes
Renfrew South January 12, 1956 James Shannon Dempsey     Progressive Conservative James Anthony Maloney     Progressive Conservative Death Yes

† Won by acclamation

24th Legislative Assembly of Ontario 1951–1955

See also: 24th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Leeds September 16, 1954 Charles Gordon MacOdrum     Progressive Conservative James Auld     Progressive Conservative Death Yes
Nipissing September 16, 1954 William Bruce Harvey     Progressive Conservative Jean Marc Chaput     Progressive Conservative Death Yes
Russell September 16, 1954 Joseph Daniel Nault     Progressive Conservative Gordon Lavergne     Progressive Conservative Death Yes
Simcoe East February 8, 1954 John Duncan McPhee     Progressive Conservative Lloyd Averall Letherby     Progressive Conservative Death Yes
Niagara Falls October 26, 1953 William Houck     Liberal Arthur Connaught Jolley     Progressive Conservative Resigned to enter federal politics No

23rd Legislative Assembly of Ontario 1948–1951

See also: 23rd Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Leeds October 31, 1949 Walter Bain Reynolds     Progressive Conservative Hugh Alexander Reynolds     Progressive Conservative Death Yes
Cochrane North June 8, 1949 John Carrère     Progressive Conservative Marcel Léger     Progressive Conservative Death Yes
Parry Sound December 9, 1948 Charles Wilson Cragg     Progressive Conservative Allister Johnston     Progressive Conservative Death Yes

22nd Legislative Assembly of Ontario 1945–1948

See also: 22nd Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Huron February 16, 1948 Robert Hobbs Taylor     Progressive Conservative Thomas Pryde     Progressive Conservative Death Yes

21st Legislative Assembly of Ontario 1943–1945

See also: 21st Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Haldimand—Norfolk March 20, 1944 Wallace William Walsh     Progressive Conservative Charles Hammond Martin     Progressive Conservative Death Yes

20th Legislative Assembly of Ontario 1937–1943

See also: 20th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Grey South February 24, 1941† Farquhar Oliver     United Farmers of Ontario Farquhar Oliver      Liberal Sought re-election upon appointment as Minister of Public Works No
Ottawa East November 27, 1940 Paul Leduc      Liberal Robert Laurier      Liberal Resignation Yes
Simcoe Centre October 23, 1940† Leonard Jennett Simpson      Liberal Duncan McArthur      Liberal Death Yes
Simcoe East February 14, 1939† William Finlayson     Conservative George A. Drew     Conservative Resignation to provide a seat for Conservative leader Drew Yes
Parkdale October 5, 1938 Fred McBrien     Conservative William James Stewart     Conservative Death Yes
Waterloo South September 28, 1938† Norman Hipel      Liberal Norman Hipel      Liberal Sought re-election upon appointment as Minister of Labour Yes
Brantford July 20, 1938 Morrison Mann MacBride      Independent-Liberal* Louis Hagey      Liberal Death Yes
Lambton East March 22, 1938 Milton Duncan McVicar      Liberal Charles Oliver Fairbank      Liberal Death Yes
Hamilton Centre March 2, 1938 William Frederick Schwenger      Liberal John Newlands      Liberal Resigned to become a judge Yes
Sault Ste. Marie November 23, 1937† Richard McMeekin      Liberal Colin Campbell      Liberal Resignation to provide a seat for Campbell Yes

† Won by acclamation

*Though nominally an "Independent-Liberal", MacBride was a supporter of the Liberal government and was a cabinet minister at the time of his death

19th Legislative Assembly of Ontario 1934–1937

See also: 19th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Hastings East December 9, 1936 James Ferguson Hill     Conservative Harold Edward Welsh     Conservative Death Yes
Nipissing March 4, 1935 Théodore Legault      Liberal Joseph Marceau      Liberal Death Yes
Grey North August 20, 1934 David James Taylor      Liberal-Progressive Roland Patterson      Liberal-Progressive Resigned to accept appointment as Deputy Minister of Game and Fisheries Yes
Wellington South August 20, 1934 Duncan Paul Munro      Liberal James Harold King      Liberal Death Yes
Kenora August 7, 1934† Earl Hutchinson      Labour Peter Heenan      Liberal Resigned to become vice-chairman of Workmen's Compensation Board No

† Won by acclamation

18th Legislative Assembly of Ontario 1929–1934

See also: 18th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Kent East January 3, 1934† Philip James Henry     Conservative Douglas Munro Campbell      Liberal Death No
York West May 28, 1932 Forbes Godfrey     Conservative Henry Isaac Price     Conservative Death Yes
Wellington South November 18, 1931 Lincoln Goldie     Conservative Duncan Paul Munro      Liberal Died No
Dundas August 29, 1931† George Holmes Challies     Conservative George Holmes Challies     Conservative Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Norfolk July 8, 1931 John Strickler Martin     Conservative Arthur Campbell Burt     Conservative Death Yes
Grenville February 11, 1931 Howard Ferguson     Conservative James Alfred Sanderson     Conservative Resigned to accept appointment as Canadian High Commissioner to the United Kingdom Yes
Hamilton West February 11, 1931 Frederick Thomas Smye     Conservative D'Arcy Argue Counsell Martin     Conservative Death Yes
Lanark South October 29, 1930 James Alexander Anderson     Conservative Egerton Reuben Stedman     Conservative Death Yes
Nipissing October 29, 1930 Henri Morel     Conservative Charles Robert Harrison     Conservative Resigned to run in the 1930 federal election Yes
Perth South October 29, 1930 David Bonis     Conservative Charles Edward Richardson     Conservative Death Yes
Waterloo South October 29, 1930 Karl Kenneth Homuth     Conservative Norman Hipel      Liberal Resigned to run in the 1930 federal election No
Algoma October 18, 1930† John Morrow Robb     Conservative John Morrow Robb     Conservative Sought re-election upon appointment as Minister of Health Yes
Brantford October 18, 1930† William George Martin     Conservative William George Martin     Conservative Sought re-election upon appointment as Minister of Public Welfare Yes
Peel October 18, 1930† Thomas Laird Kennedy     Conservative Thomas Laird Kennedy     Conservative Sought re-election upon appointment as Minister of Agriculture Yes
Renfrew North October 18, 1930† Edward Arunah Dunlop     Conservative Edward Arunah Dunlop     Conservative Sought re-election upon appointment as Provincial Treasurer Yes
York South October 18, 1930† Leopold Macaulay     Conservative Leopold Macaulay     Conservative Sought re-election upon appointment as Provincial Secretary and Registrar Yes

† Won by acclamation

17th Legislative Assembly of Ontario 1926–1929

See also: 17th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Renfrew North June 27, 1928 Alexander Stuart     Conservative Edward Arunah Dunlop     Conservative Death Yes
Bruce South June 27, 1928 Malcolm Alex McCallum     Progressive Foster Graham Moffatt     Conservative Election declared void No
Hamilton East June 27, 1928 Leeming Carr     Conservative William Robert Morrison     Conservative Resigned to accept appointment as Sheriff of Wellington County Yes
Prince Edward November 1, 1927† William Raney     United Farmers of Ontario Horace Stanley Colliver     Conservative Appointed to Supreme Court of Ontario No

† Won by acclamation

16th Legislative Assembly of Ontario 1923–1926

See also: 16th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Toronto Northwest A July 7, 1924 Thomas Crawford     Conservative William Henry Edwards     Conservative Resigned to accept appointment as Registrar Yes
Waterloo South June 23, 1924 Karl Kenneth Homuth     Labour Karl Kenneth Homuth     Labour Election declared void Yes
Lennox October 22, 1923 John Perry Vrooman      Liberal Charles Wesley Hambly     Conservative Death No
York West August 16, 1923† Forbes Godfrey     Conservative Forbes Godfrey     Conservative Sought re-election upon appointment as Minister of Labour Yes
York East August 16, 1923† George Stewart Henry     Conservative George Stewart Henry     Conservative Sought re-election upon appointment as Minister of Public Works and Highways Yes
Wellington South August 16, 1923† Lincoln Goldie     Conservative Lincoln Goldie     Conservative Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Sudbury August 16, 1923† Charles McCrea     Conservative Charles McCrea     Conservative Sought re-election upon appointment as Minister of Mines Yes
Sault Ste. Marie August 16, 1923† James Winfield Lyons     Conservative James Winfield Lyons     Conservative Sought re-election upon appointment as Minister of Lands and Forests Yes
Parkdale August 16, 1923† William Herbert Price     Conservative William Herbert Price     Conservative Sought re-election upon appointment as Provincial Treasurer Yes
Norfolk South August 16, 1923† John Strickler Martin     Conservative John Strickler Martin     Conservative Sought re-election upon appointment as Minister of Agriculture Yes
Kingston August 16, 1923† William Folger Nickle     Conservative William Folger Nickle     Conservative Sought re-election upon appointment as Attorney-General Yes
Grenville August 16, 1923† George Howard Ferguson     Conservative George Howard Ferguson     Conservative Sought re-election upon appointment as Premier and Minister of Education Yes

† Won by acclamation

15th Legislative Assembly of Ontario 1919–1923

See also: 15th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Russell October 23, 1922 Damase Racine      Liberal Alfred Goulet      Liberal Death Yes
Toronto Southeast A October 23, 1922 John O'Neill      Liberal John Allister Currie      Conservative Death No
Kingston February 6, 1922 Arthur Edward Ross      Conservative William Folger Nickle      Conservative Resigned to run in the 1921 federal election Yes
Oxford North December 19, 1921 John Alexander Calder      Liberal David Munroe Ross      United Farmers of Ontario Death No
Toronto Northeast A November 8, 1920 Henry John Cody      Conservative Alexander Cameron Lewis      Conservative Resignation Yes
Fort William July 19, 1920† Harry Mills      Labour Harry Mills      Labour Sought re-election upon appointment as Minister of Mines Yes
Wellington East February 23, 1920† Albert Hellyer      United Farmers of Ontario William Raney      United Farmers of Ontario Resignation to provide a seat for Raney Yes
Halton February 16, 1920 John Featherstone Ford      United Farmers of Ontario Ernest Charles Drury      United Farmers of Ontario Resignation to provide a seat for Drury Yes
Kent East February 9, 1920† James B. Clark      United Farmers of Ontario Manning Doherty      United Farmers of Ontario Resignation to provide a seat for Doherty Yes
Brant North December 15, 1919† Harry Nixon      United Farmers of Ontario Harry Nixon      United Farmers of Ontario Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Wentworth North December 15, 1919† Frank Campbell Biggs      United Farmers of Ontario Frank Campbell Biggs      United Farmers of Ontario Sought re-election upon appointment as Minister of Public Works and Highways Yes
Perth South December 15, 1919† Peter Smith      United Farmers of Ontario Peter Smith      United Farmers of Ontario Sought re-election upon appointment as Provincial Treasurer Yes
Manitoulin December 15, 1919† Beniah Bowman      United Farmers of Ontario Beniah Bowman      United Farmers of Ontario Sought re-election upon appointment as Minister of Lands, Forests and Mines Yes
Hamilton West December 15, 1919† Walter Rollo      Labour Walter Rollo      Labour Sought re-election upon appointment as Minister of Labour Yes
Carleton December 15, 1919† Robert Henry Grant      United Farmers of Ontario Robert Henry Grant      United Farmers of Ontario Sought re-election upon appointment as Minister of Education Yes

† Won by acclamation

14th Legislative Assembly of Ontario 1914–1919

See also: 14th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Ontario North February 18, 1919 William Hoyle     Conservative John Wesley Widdifield     United Farmers of Ontario Death No
St. Catharines February 15, 1919 Elisha Jessop     Conservative Frederick Raymond Parnell     Conservative Death Yes
Huron North December 2, 1918 Armstrong Musgrove     Conservative William Henry Fraser      Liberal Resignation upon appointment as Postmaster of Wingham No
Manitoulin October 24, 1918 Robert Roswell Gamey     Conservative Beniah Bowman     United Farmers of Ontario Death No
Oxford North September 23, 1918† Newton Wesley Rowell      Liberal John Alexander Calder      Liberal Resigned to run in the 1917 federal election. Yes
Lennox August 29, 1918† Thomas George Carscallen     Conservative Reginald Amherst Fowler     Conservative Death Yes
York East August 19, 1918 George Stewart Henry     Conservative George Stewart Henry     Conservative Sought re-election upon appointment as Minister of Agriculture     Yes
Toronto Northeast A August 19, 1918 Robert Allan Pyne     Conservative Henry John Cody     Conservative Resigned to accept position as Clerk of York County. Yes
Toronto Northwest B January 22, 1917 William David McPherson     Conservative William David McPherson     Conservative Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Simcoe West January 15, 1917† James Stoddart Duff     Conservative William Torrance Allen     Conservative Death Yes
Toronto Southwest A August 21, 1916 James Joseph Foy     Conservative Hartley Dewart      Liberal Death No
Perth North July 10, 1916 James Torrance     Conservative Wellington Hay      Liberal Appointed Registrar No
Muskoka June 12, 1916† Samuel Henry Armstrong     Conservative George Walter Ecclestone     Conservative Death Yes
Peel February 24, 1916 James Robinson Fallis     Conservative William James Lowe      Liberal Resignation No
Algoma October 25, 1915† Albert Grigg     Conservative John Morrow Robb     Conservative Resignation upon appointment as Deputy Minister of Crown Lands Yes
Grenville January 7, 1915† George Howard Ferguson     Conservative George Howard Ferguson     Conservative Sought re-election upon appointment as Minister of Lands, Forests and Mines Yes
Renfrew South January 7, 1915† Thomas William McGarry     Conservative Thomas William McGarry     Conservative Sought re-election upon appointment as Provincial Treasurer Yes
Dundas December 7, 1914 Sir James Whitney     Conservative Irwin Foster Hilliard     Conservative Death Yes
Hamilton West November 18, 1914 John Strathearn Hendrie     Conservative John Allan     Conservative Appointed Lieutenant Governor of Ontario Yes
Elgin West October 21, 1914† Findlay George MacDiarmid     Conservative Findlay George MacDiarmid     Conservative Sought re-election upon appointment as Minister of Public Works Yes

† Won by acclamation

13th Legislative Assembly of Ontario 1911–1914

See also: 13th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Middlesex East November 27, 1913 George Wesley Neely     Conservative John McFarlane     Conservative Death Yes
Peel November 3, 1913 Samuel Charters     Conservative James Robinson Fallis     Conservative Appointed Registrar Yes
York East September 8, 1913 Alexander McCowan     Conservative George Stewart Henry     Conservative Appointed Sheriff of York County Yes
Grey North July 14, 1913 Alexander Grant MacKay      Liberal Colin Stewart Cameron     Conservative Resignation upon entering provincial politics in Alberta No
Grey Centre June 2, 1913† Isaac Benson Lucas     Conservative Isaac Benson Lucas     Conservative Sought re-election upon appointment as Provincial Treasurer Yes
Lanark South March 19, 1913 Arthur Matheson     Conservative John Charles Ebbs     Conservative Death Yes
Muskoka November 5, 1912† Arthur Arnold Mahaffy     Conservative Samuel Henry Armstrong     Conservative Appointed a Judge Yes
Waterloo North October 28, 1912 Henry George Lackner     Conservative Charles Henry Mills     Conservative Appointed Sheriff of Waterloo County Yes
Middlesex East October 28, 1912 Robert Sutherland      Liberal George Wesley Neely     Conservative Death No

† Won by acclamation

12th Legislative Assembly of Ontario 1908–1911

See also: 12th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Wellington South October 21, 1910† Joseph Patrick Downey     Conservative John Ransom Howitt     Conservative Appointed Superintendent for the Ontario Asylum for Idiots Yes
Middlesex North December 6, 1909 Duncan Campbell Ross      Liberal James William Doyle     Conservative Resignation to enter federal politics No
Victoria East May 25, 1909 John Hilliard Carnegie     Conservative Robert Mercer Mason     Conservative Resignation upon appointment as Distributor of Law Stamps Yes
Algoma December 17, 1908† William Ross Smyth     Conservative Albert Grigg     Conservative Resignation to enter federal politics Yes
Simcoe West October 23, 1908† James Stoddart Duff     Conservative James Stoddart Duff     Conservative Sought re-election upon appointment as Minister of Agriculture Yes

† Won by acclamation

11th Legislative Assembly of Ontario 1905–1908

See also: 11th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Brockville October 7, 1907 George Perry Graham      Liberal Albert Edward Donovan     Conservative Resignation on entering federal politics No
Dufferin July 24, 1907 Frederick William Lewis     Conservative Charles Robert McKeown     Conservative Death Yes
York West June 1, 1907 Joseph Wesley St. John     Conservative Forbes Godfrey     Conservative Death Yes
Carleton March 18, 1907 George Nelson Kidd     Conservative Robert McElroy     Conservative Death Yes
Middlesex West February 20, 1907 George William Ross      Liberal Duncan Campbell Ross      Liberal Appointed to the Senate Yes
Hamilton East December 4, 1906 Henry Carscallen     Conservative Allan Studholme     Labour Death No
Cardwell September 21, 1906† Edward Alfred Little     Conservative Alexander Ferguson     Conservative Appointed Registrar Yes
Toronto North February 22, 1906 William Beattie Nesbitt     Conservative William Kirkpatrick McNaught     Conservative Appointed registrar of West Toronto Yes
Kingston January 29, 1906 Edward John Barker Pense      Liberal Edward John Barker Pense      Liberal Election declared void Yes
Nipissing East June 13, 1905† Charles Lamarche     Conservative Francis Cochrane     Conservative Resignation to provide a seat for Cochrane Yes
Toronto South February 21, 1905† James Joseph Foy     Conservative James Joseph Foy     Conservative Sought re-election upon appointment as Commissioner of Crown Lands Yes
Toronto East February 21, 1905† Robert Allan Pyne     Conservative Robert Allan Pyne     Conservative Sought re-election upon appointment as Minister of Education Yes
Perth South February 21, 1905† Samuel Nelson Monteith     Conservative Samuel Nelson Monteith     Conservative Sought re-election upon appointment as Minister of Agriculture Yes
Lanark South February 21, 1905† Arthur James Matheson     Conservative Arthur James Matheson     Conservative Sought re-election upon appointment as Provincial Treasurer Yes
Lambton West February 21, 1905† William John Hanna     Conservative William John Hanna     Conservative Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Essex North February 21, 1905† Joseph Octave Reaume     Conservative Joseph Octave Reaume     Conservative Sought re-election upon appointment as Commissioner of Public Works Yes
Dundas February 21, 1905† James Pliny Whitney     Conservative James Pliny Whitney     Conservative Sought re-election upon appointment as Premier and Attorney-General Yes

† Won by acclamation

10th Legislative Assembly of Ontario 1902–1904

See also: 10th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Oxford North January 26, 1904 Andrew Pattulo      Liberal James S. Munro      Liberal Death Yes
Renfrew North December 26, 1903 John W. Munro      Liberal Edward Arunah Dunlop     Conservative Death No
Sault Ste. Marie October 27, 1903 Andrew Miscampbell     Conservative Charles Napier Smith      Liberal Void Election No
Muskoka October 27, 1903 Samuel Bridgeland      Liberal Arthur Arnold Mahaffy     Conservative Death No
York North February 26, 1903 Elihu James Davis      Liberal Elihu James Davis      Liberal Resignation in exchange for withdrawal of election petition Yes
Bruce Centre February 26, 1903 Hugh Clark     Conservative Hugh Clark     Conservative Void Election Yes
Perth North January 7, 1903 John C. Monteith     Conservative John Brown      Liberal Void Election No
Norfolk North January 7, 1903 Frederick Snider     Conservative Archibald Little      Liberal Void Election No
Grey North January 7, 1903 Alexander Grant MacKay      Liberal Alexander Grant MacKay      Liberal Void Election Yes

9th Legislative Assembly of Ontario 1898–1902

See also: 9th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Kingston January 30, 1902† William Harty      Liberal Edward John Barker Pense      Liberal Resignation to enter federal politics Yes
Huron West December 4, 1901 James Thompson Garrow      Liberal James Thompson Garrow      Liberal Void Election Yes
Kent East November 4, 1901† Robert Ferguson      Liberal John Lee      Liberal Death Yes
London July 9, 1901 Francis Baxter Leys      Liberal Francis Baxter Leys      Liberal Sought re-election in support of removing a dam on the Thames River Yes
Welland December 13, 1900 William Manley German      Liberal John Franklin Gross      Liberal Resignation to enter federal politics Yes
Waterloo North October 31, 1900† Louis Jacob Breithaupt      Liberal Louis Jacob Breithaupt      Liberal Void Election Yes
Renfrew North June 19, 1900† Andrew Thomas White      Conservative John W. Munro      Liberal Death No
Middlesex East January 31, 1900 Thomas D. Hodgins      Conservative Thomas Robson      Conservative Death Yes
Brant South December 12, 1899 Arthur Sturgis Hardy      Liberal Thomas Hiram Preston      Liberal Resignation Yes
Elgin East December 12, 1899 Charles Andrew Brower      Conservative Charles Andrew Brower      Conservative Void Election Yes
Elgin West December 12, 1899 Donald Macnish      Liberal Findlay George MacDiarmid      Conservative Void Election No
Ontario South December 12, 1899 John Dryden      Liberal John Dryden      Liberal Void Election Yes
Renfrew South November 14, 1899 Robert Adam Campbell      Liberal Francis Robert Latchford      Liberal Resignation to provide a seat for Latchford Yes
Peterborough West November 7, 1899† James Robert Stratton      Liberal James Robert Stratton      Liberal Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Waterloo North May 23, 1899 Henry George Lackner      Conservative Louis Jacob Breithaupt      Liberal Void Election No
Perth South February 28, 1899 William Caven Moscrip      Liberal Samuel Nelson Monteith      Conservative Void Election No
Elgin West January 12, 1899 Findlay George MacDiarmid     Conservative Donald Macnish      Liberal Void Election No
Hastings North December 27, 1898 William John Allen      Conservative William John Allen      Conservative Resignation in exchange for withdrawal of election petition Yes
Nipissing December 27, 1898 John Loughrin      Liberal John Loughrin      Liberal Void Election Yes
Northumberland East December 14, 1898 John Henry Douglas      Liberal John Henry Douglas      Liberal Void Election Yes
Halton December 8, 1898 John Roaf Barber      Liberal John Roaf Barber      Liberal Void Election Yes
Huron West December 8, 1898 James Thompson Garrow      Liberal James Thompson Garrow      Liberal Void Election Yes
Lennox November 18, 1898 Bowen Ebenezer Aylsworth      Liberal Bowen Ebenezer Aylsworth      Liberal Void Election Yes
Ontario South November 1, 1898 Charles Calder      Conservative John Dryden      Liberal Void Election No
Wellington East October 27, 1898 John Craig      Liberal John Morison Gibson      Liberal Death Yes

† Won by acclamation

8th Legislative Assembly of Ontario 1894–1898

See also: 8th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Essex South October 20, 1896 William Douglas Balfour      Liberal John Allan Auld      Liberal Death Yes
York North September 8, 1896† Elihu James Davis      Liberal Elihu James Davis      Liberal Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Oxford North September 7, 1896 Oliver Mowat      Liberal Andrew Pattulo      Liberal Appointed to the Senate Yes
Essex South August 4, 1896† William Douglas Balfour      Liberal William Douglas Balfour      Liberal Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Wentworth South January 24, 1896 Nicholas Awrey      Liberal John Dickenson      Liberal Appointed Sheriff of Wentworth County Yes
Wellington West January 24, 1896 George Tucker      Conservative-PPA James Tucker      Conservative Void Election Yes
Kingston October 8, 1895† William Harty      Liberal William Harty      Liberal Void Election Yes
Brant North May 20, 1895† William Bruce Wood      Liberal Daniel Burt      Liberal Resignation Yes
Haldimand March 19, 1895 John Senn      Conservative Jacob Baxter      Liberal Void Election No
Algoma West January 29, 1895 James M. Savage      Conservative James Conmee      Liberal Void Election No
Kingston January 28, 1895 Edward H. Smythe      Conservative William Harty      Liberal Void Election No
London November 20, 1894 William Ralph Meredith      Conservative Thomas Saunders Hobbs      Liberal Appointed a judge No

† Won by acclamation

7th Legislative Assembly of Ontario 1890–1894

See also: 7th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Lanark South February 16, 1894 Nathaniel McLenaghan      Conservative James Maitland Clarke      Liberal Resignation No
Lambton East December 2, 1893 Hugh McKenzie      Liberal Peter Duncan McCallum      Independent Conservative Death No
Bruce North December 2, 1893 David Porter      Liberal Daniel McNaughton      Liberal Death Yes
Toronto February 28, 1893 Nelson Gordon Bigelow      Liberal George Ryerson      Conservative Death No
Peel December 30, 1892 Kenneth Chisholm      Liberal John Smith      Liberal Appointed Registrar for Peel County Yes
Toronto April 29, 1892 Henry Edward Clarke      Conservative Nelson Gordon Bigelow      Liberal Death No
Renfrew North February 29, 1892 Arunah Dunlop      Conservative Henry Barr      Liberal Death No
Kingston February 29, 1892 James Henry Metcalfe      Conservative William Harty      Liberal Resignation to enter federal politics No
Wellington East November 10, 1891 Charles Clarke      Liberal James Kirkwood      Liberal Appointed Clerk of the House Yes
Grey South April 2, 1891† James Hill Hunter      Liberal Gilbert McKechnie      Liberal Death Yes
Bruce North March 3, 1891 John George      Conservative David Porter      Liberal Void Election No
Hamilton February 24, 1891 Thomas Henry Stinson      Conservative John Morison Gibson      Liberal Void Election No
Perth North January 23, 1891 Alfred Emanuel Ahrens      Liberal Thomas Magwood      Conservative Void Election No
Norfolk South January 23, 1891 William Andrew Charlton      Liberal William Andrew Charlton      Liberal Void Election Yes
Norfolk North January 23, 1891 John Bailey Freeman      Liberal Edwin Clarendon Carpenter      Liberal Death Yes
Durham East January 23, 1891 George Campbell      Conservative-Equal Rights George Campbell      Conservative-Equal Rights Void Election Yes
Ontario South September 30, 1890† John Dryden      Liberal John Dryden      Liberal Sought re-election upon appointment as Commissioner of Agriculture Yes
Monck September 30, 1890† Richard Harcourt      Liberal Richard Harcourt      Liberal Sought re-election upon appointment as Provincial Treasurer Yes

† Won by acclamation

6th Legislative Assembly of Ontario 1886–1890

See also: 6th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Lambton West October 19, 1889† Timothy Blair Pardee      Liberal Charles MacKenzie      Liberal Death Yes
Hamilton January 31, 1889† John Morison Gibson      Liberal John Morison Gibson      Liberal Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Northumberland East October 11, 1888 Richard Clarke      Liberal William Arnson Willoughby      Conservative Death No
Frontenac October 11, 1888 Henry Wilmot      Conservative Hugh Smith      Conservative Death Yes
Elgin East October 11, 1888 Thomas McIntyre Nairn      Liberal James Charles Dance      Liberal Death Yes
Lanark North October 4, 1888† Daniel Hilliard      Liberal William Clyde Caldwell      Liberal Death Yes
York North May 23, 1888† Joseph Henry Widdifield      Liberal Elihu James Davis      Liberal Resignation Yes
Simcoe East May 16, 1888† Charles Alfred Drury      Liberal Charles Alfred Drury      Liberal Sought re-election upon appointment as Commissioner of Agriculture Yes
Northumberland East February 1, 1888 William Arnson Willoughby      Conservative Richard Clarke      Liberal Void Election No
Dundas January 31, 1888 Theodore F. Chamberlain      Liberal James Pliny Whitney      Conservative Void Election No

† Won by acclamation

5th Legislative Assembly of Ontario 1883–1886

See also: 5th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Algoma East June 29, 1885 New Seat Robert Adam Lyon      Liberal Algoma divided N/A
Simcoe East June 26, 1885 Charles Alfred Drury      Liberal Charles Alfred Drury      Liberal Void Election Yes
Lennox June 26, 1885 George Douglas Hawley      Liberal George Douglas Hawley      Liberal Void Election Yes
Algoma West June 26, 1885 New Seat James Conmee      Liberal Algoma divided N/A
Kent East June 19, 1885† Daniel McCraney      Liberal Robert Ferguson      Liberal Death Yes
Renfrew South January 27, 1885 John Francis Dowling      Liberal John Francis Dowling      Liberal Void Election Yes
Lennox August 28, 1884 Alexander Hall Roe      Conservative George Douglas Hawley      Liberal Death No
Muskoka and Parry Sound July 23, 1884 Frederick G. Fauquier      Conservative Jacob William Dill      Liberal Void Election No
Grey East March 18, 1884 Abram William Lauder      Conservative Neil McColman      Conservative Death Yes
Oxford South March 5, 1884 Adam Crooks      Liberal George Atwell Cooke      Liberal Crooks declared "incurably insane" and seat vacated Yes
Renfrew South January 18, 1884 John Francis Dowling      Liberal John Francis Dowling      Liberal Void Election Yes
Simcoe West December 14, 1883 Orson James Phelps      Liberal Orson James Phelps      Liberal Void Election Yes
Middlesex West December 14, 1883 Alexander Johnston      Conservative George William Ross      Liberal Void Election No
Cardwell December 14, 1883 William Henry Hammell      Conservative William Henry Hammell      Conservative Void Election Yes
Huron West November 16, 1883† Alexander McLagan Ross      Liberal Alexander McLagan Ross      Liberal Sought re-election upon appointment as Provincial Treasurer and Commissioner of Agriculture Yes
Brant North June 16, 1883 James Young      Liberal James Young      Liberal Sought re-election upon appointment as Provincial Treasurer and Commissioner of Agriculture Yes

† Won by acclamation

4th Legislative Assembly of Ontario 1879–1883

See also: 4th Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Muskoka and Parry Sound October 30, 1882 John Classon Miller      Liberal James Whitney Bettes      Liberal Resignation to contest the 1882 federal election Yes
Waterloo South October 18, 1882 James Livingston      Liberal Isaac Master      Liberal Resignation to contest the 1882 federal election Yes
Simcoe East October 18, 1882 Herman Henry Cook      Liberal Charles Alfred Drury      Liberal Resignation to contest the 1882 federal election Yes
Renfrew North October 18, 1882† Thomas Murray      Liberal William Balmer McAllister      Conservative Resignation to contest the 1882 federal election Yes*
Hastings West October 18, 1882 Alexander Robertson      Conservative Baltis Rose      Conservative Resignation to contest the 1882 federal election Yes
Glengarry October 18, 1882 Donald Macmaster      Conservative James Rayside      Liberal Resignation to contest the 1882 federal election No
Essex South October 18, 1882 Lewis Wigle      Conservative William Douglas Balfour      Liberal Resignation to contest the 1882 federal election No
Bruce South October 18, 1882 Rupert Mearse Wells      Liberal Hamilton Parke O'Connor      Liberal Resignation to contest the 1882 federal election Yes
Peterborough West August 24, 1881† William Hepburn Scott      Conservative Robert Kincaid      Conservative Death Yes
Durham East June 29, 1881 John Rosevear      Conservative Charles Herbert Brereton      Conservative Death Yes
Waterloo North June 27, 1881 Moses Springer      Liberal Elias Weber Bingeman Snider      Liberal Resignation to become Sheriff of Waterloo County Yes
Ontario North June 4, 1881 Thomas Paxton      Liberal Frank Madill      Conservative Resignation to become Sheriff of Ontario County No
Prescott April 14, 1881 William Harkin      Conservative Albert Hagar      Liberal Death No
Hastings West January 30, 1880 Alexander Robertson      Conservative Alexander Robertson      Conservative Void Election Yes
Stormont January 23, 1880 Joseph Kerr      Conservative Joseph Kerr      Conservative Void Election Yes
Dufferin January 9, 1880 John Barr      Conservative William Jelly      Conservative Void Election Yes

† Won by acclamation

*McAllister was a supporter of Mowat's government

3rd Legislative Assembly of Ontario 1875–1879

See also: 3rd Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Toronto East December 21, 1878 Matthew Crooks Cameron      Conservative Alexander Morris      Conservative Appointed a judge Yes
Monck December 21, 1878 Henry Ryan Haney      Liberal Richard Harcourt      Liberal Death Yes
Simcoe South October 29, 1878 William McDougall      Independent Liberal William James Parkhill      Conservative Resignation to contest the 1878 federal election No
Essex North October 29, 1878 James Colebrooke Patterson      Conservative Solomon White      Conservative Resignation to contest the 1878 federal election Yes
Elgin West October 29, 1878 Thomas Hodgins      Liberal David McLaws      Liberal Resignation to contest the 1878 federal election Yes
Algoma October 8, 1878† Simon James Dawson      Liberal Robert Adam Lyon      Liberal Resignation to contest the 1878 federal election Yes
Brant South March 29, 1877† Arthur Sturgis Hardy      Liberal Arthur Sturgis Hardy      Liberal Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Waterloo South February 19, 1877 John Fleming      Liberal Isaac Master      Liberal Death Yes
Frontenac February 12, 1877 Peter Graham      Conservative Delino Dexter Calvin      Conservative Death Yes
Wellington South October 11, 1876† Peter Gow      Liberal James Massie      Liberal Resignation to become Sheriff of Wellington County Yes
Northumberland East November 9, 1875 James Marshall Ferris      Liberal James Marshall Ferris      Liberal Void Election Yes
Halton November 2, 1875 William Barber      Liberal William Durie Lyon      Liberal Void Election Yes
Grey North October 30, 1875 Thomas Scott      Conservative David Creighton      Conservative Void Election Yes
Wentworth North October 29, 1875 Thomas Stock      Conservative James McMahon      Liberal Void Election No
Peterborough West October 26, 1875 George Albertus Cox      Liberal William Hepburn Scott      Conservative Void Election No
Victoria North September 29, 1875 John David Smith      Liberal Duncan McRae      Conservative Void Election No
Wellington West September 27, 1875 John McGowan      Liberal-Conservative John McGowan      Liberal-Conservative Void Election Yes
Dundas September 25, 1875 Andrew Broder      Conservative Andrew Broder      Conservative Void Election Yes
Peterborough East September 24, 1875 John C. O'Sullivan      Conservative John C. O'Sullivan      Conservative Void Election Yes
Kent East September 17, 1875 Archibald McKellar      Liberal Daniel McCraney      Liberal Appointed Sheriff of Wentworth County Yes
Essex South September 17, 1875 Lewis Wigle      Conservative Lewis Wigle      Conservative Void Election Yes
Oxford South September 11, 1875 Adam Oliver      Liberal Adam Crooks      Liberal Void Election Yes
Russell August 12, 1875 Adam Jacob Baker      Conservative Adam Jacob Baker      Conservative Void Election Yes
Victoria South August 10, 1875 Samuel Casey Wood      Liberal Samuel Casey Wood      Liberal Sought re-election upon appointment as Provincial Secretary and Commissioner of Agriculture Yes
Cornwall July 17, 1875 Alexander Fraser McIntyre      Conservative John Goodall Snetsinger      Liberal Void Election No
Welland July 2, 1875 James Currie      Liberal James Currie      Liberal Void Election Yes
Monck June 22, 1875 Henry Ryan Haney      Liberal Henry Ryan Haney      Liberal Void Election Yes
Ontario North June 21, 1875 Thomas Paxton      Liberal Thomas Paxton      Liberal Void Election Yes
Simcoe South May 26, 1875 D'Arcy Boulton      Conservative William McDougall      Independent Liberal Death No

† Won by acclamation

2nd Legislative Assembly of Ontario 1871–1874

See also: 2nd Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Peterborough West July 30, 1874 Thomas McCulloch Fairbairn      Liberal William Hepburn Scott      Conservative Death No
Wellington North February 20, 1874 Robert McKim      Liberal John McGowan      Conservative Resignation to enter federal politics No
Perth North February 14, 1874 Andrew Monteith      Conservative Thomas Mayne Daly      Conservative Resignation to enter federal politics Yes
Oxford South January 19, 1874† Adam Oliver      Liberal Adam Oliver      Liberal Resignation due to not being appointed Sheriff of Oxford County and selling timber to the provincial government Yes
Ottawa January 18, 1874 Richard William Scott      Liberal Daniel John O'Donoghue     Independent Labour Appointed to the Senate Yes
Simcoe South December 30, 1873 Thomas Roberts Ferguson      Conservative D'Arcy Boulton      Conservative Resignation Yes
Peel December 19, 1873 John Coyne      Conservative Kenneth Chisholm      Liberal Death No
Grenville South December 9, 1873† Christopher Finlay Fraser      Liberal Christopher Finlay Fraser      Liberal Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Leeds South December 1873† Herbert Stone MacDonald      Conservative John Godkin Giles      Conservative Resignation to be appointed to the county court Yes
Huron South October 16, 1873 Robert Gibbons      Liberal Archibald Bishop      Liberal Resignation to become Sheriff of Huron County Yes
Brant South April 28, 1873 Edmund Burke Wood      Conservative Arthur Sturgis Hardy      Liberal Resignation to enter federal politics No
Oxford North November 29, 1872† George Perry      Liberal Oliver Mowat      Liberal Resignation to provide a seat for Mowat Yes
Lambton November 13, 1872† Timothy Blair Pardee      Liberal Timothy Blair Pardee      Liberal Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Grenville South October 16, 1872 Christopher Finlay Fraser      Liberal Christopher Finlay Fraser      Liberal Void Election Yes
Middlesex West September 17, 1872 Alexander Mackenzie      Liberal John Watterworth      Liberal Resignation upon abolition of the dual mandate Yes
Bruce South September 14, 1872 Edward Blake      Liberal Rupert Mearse Wells      Liberal Resignation upon abolition of the dual mandate Yes
Monck September 1872 Lachlin McCallum      Conservative Henry Ryan Haney      Liberal Resignation upon abolition of the dual mandate No
London August 26, 1872 John Carling      Conservative William Ralph Meredith      Conservative Resignation upon abolition of the dual mandate Yes
Lanark North August 23, 1872 Daniel Galbraith      Liberal William Clyde Caldwell      Liberal Resignation to enter federal politics Yes
Cornwall July 13, 1872 John Sandfield Macdonald      Conservative John Goodall Snetsinger      Liberal Death No
Grenville South March 26, 1872 Mcneil Clarke      Conservative Christopher Finlay Fraser      Liberal Death No
Toronto West January 9, 1872 Adam Crooks      Liberal Adam Crooks      Liberal Sought re-election upon appointment as Attorney-General Yes
Bothwell January 6, 1872† Archibald McKellar      Liberal Archibald McKellar      Liberal Sought re-election upon appointment as Commissioner of Agriculture and Public Works Yes
Middlesex West January 5, 1872† Alexander Mackenzie      Liberal Alexander Mackenzie      Liberal Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Bruce South January 5, 1872† Edward Blake      Liberal Edward Blake      Liberal Resignation to re-contest upon being appointed Premier Yes
Northumberland West January 5, 1872 Alexander Fraser      Liberal Charles Gifford      Conservative Resignation No
Wellington South January 4, 1872† Peter Gow      Liberal Peter Gow      Liberal Sought re-election upon appointment as Provincial Secretary and Registrar Yes
Ottawa January 4, 1872† Richard William Scott      Liberal Richard William Scott      Liberal Sought re-election upon appointment as Commissioner of Crown Lands Yes
Stormont January 3, 1872 William Colquhoun      Conservative James Bethune      Liberal Void Election No
Simcoe North January 2, 1872 William Davis Ardagh      Conservative William Davis Ardagh      Conservative Void Election Yes
Carleton January 2, 1872 George William Monk      Conservative George William Monk      Conservative Void Election Yes
Prince Edward December 29, 1871 Gideon Striker      Liberal James Simeon McCuaig      Conservative Void Election No
James Simeon McCuaig      Conservative Gideon Striker      Liberal By-election result reversed August 29, 1872 No
Grey South December 29, 1871 Abram William Lauder      Conservative Abram William Lauder      Conservative Void Election Yes
Prescott December 27, 1871† George Wellesley Hamilton      Conservative George Wellesley Hamilton      Conservative Void Election Yes
Durham West December 27, 1871† Edward Blake      Liberal John McLeod      Liberal Chose to sit for Bruce South Yes

† Won by acclamation

1st Legislative Assembly of Ontario 1867–1871

See also: 1st Parliament of Ontario
By-election Date Incumbent Party Winner Party Cause Retained
Prince Edward June 29, 1870 Absalom Greeley      Liberal William Anderson      Conservative Appointed Sheriff of Prince Edward County No
Renfrew North December 1, 1869 John Supple      Conservative Thomas Murray      Liberal Resignation No
Lanark South February 3–4, 1869 William McNairn Shaw      Conservative Abraham Code      Conservative Death Yes
Frontenac October 19, 1868 Henry Smith      Conservative Delino Dexter Calvin      Conservative Death Yes
Niagara December 1867 Donald Robertson      Conservative Stephen Richards      Conservative Appointed Coroner Yes

See also

References

Notes

Citations

  1. ^ "These Are Men In Vote Race For One Seat". Windsor Star. September 9, 1964.
  2. ^ "Ontario Grits, C.C.F. Shun 2 By-elections". Windsor Star. August 29, 1958.

Further reading

  • Forman, Debra Legislators and Legislatures of Ontario: A Reference Guide. Legislative Library of Ontario Research and Information Services, 1984
  • Lewis, Roderick, Centennial Edition of a History of the Electoral Districts, Legislatures and Ministries of the Province of Ontario 1867–1968. F. Fogg, Queen's Printer, 1969.
  • Electoral history of Ontario: Candidates and Results. Office of the Chief Election Officer of Ontario, 1983