# 20th Canadian Parliament

The 20th Canadian Parliament was in session from 6 September 1945, until 30 April 1949. The membership was set by the 1945 federal election on 11 June 1945, and it changed only somewhat due to resignations and by-elections until it was dissolved prior to the 1949 election.
It was controlled by a Liberal Party minority first under Prime Minister William Lyon Mackenzie King and the 16th Canadian Ministry, and later a majority under Prime Minister Louis St. Laurent and the 17th Canadian Ministry. The Official Opposition was the newly named Progressive Conservative Party, led first by John Bracken and later by George Drew.
The Speaker was Gaspard Fauteux. See also List of Canadian electoral districts 1933-1947 for a list of the ridings in this parliament.
In this parliament, the Co-operative Commonwealth Federation, led by M. J. Coldwell, overtook the Social Credit as third largest party.
There were five sessions of the 20th Parliament.

## List of members

Following is a full list of members of the twentieth Parliament listed first by province, then by electoral district. Party leaders are italicized. Parliamentary assistants is indicated by "‡". Cabinet ministers are in boldface. The Prime Minister is both. The Speaker is indicated by "(†)".
Electoral districts denoted by an asterisk (*) indicates that district was represented by two members.

### Alberta

| Electoral district | Name | Party | First elected/previously elected |
| Acadia | Victor Quelch | Social Credit | 1935 |
| Athabaska | Joseph Miville Dechene | Liberal | 1940 |
| Battle River | Robert Fair | Social Credit | 1935 |
| Bow River | Charles Edward Johnston | Social Credit | 1935 |
| Calgary East | Douglas Harkness | Progressive Conservative | 1945 |
| Calgary West | Arthur LeRoy Smith | Progressive Conservative | 1945 |
| Camrose | James Alexander Marshall | Social Credit | 1935 |
| Edmonton East | Patrick Harvey Ashby | Social Credit | 1945 |
| Edmonton West | James Angus MacKinnon | Liberal | 1935 |
| Jasper—Edson | Walter Frederick Kuhl | Social Credit | 1935 |
| Lethbridge | John Horne Blackmore | Social Credit | 1935 |
| Macleod | Ernest George Hansell | Social Credit | 1935 |
| Medicine Hat | William Duncan Wylie | Social Credit | 1945 |
| Peace River | Solon Earl Low | Social Credit | 1945 |
| Red Deer | Frederick Davis Shaw | Social Credit | 1940 |
| Vegreville | Anthony Hlynka | Social Credit | 1940 |
| Wetaskiwin | Norman Jaques | Social Credit | 1935 |

### British Columbia

| Electoral district | Name | Party | First elected/previously elected |
| Cariboo | William Irvine | CCF | 1921, 1926, 1945 |
| Comox—Alberni | John Lambert Gibson | Independent Liberal | 1945 |
| Fraser Valley | George Cruickshank | Liberal | 1940 |
| Kamloops | Davie Fulton | Progressive Conservative | 1945 |
| Kootenay East | James Herbert Matthews | CCF | 1945 |
| Kootenay West | Herbert Wilfred Herridge | Independent CCF | 1945 |
| Nanaimo | George Pearkes | Progressive Conservative | 1945 |
| New Westminster | Thomas Reid ‡ | Liberal | 1930 |
| Skeena | Harry Archibald | CCF | 1945 |
| Vancouver—Burrard | Charles Merritt | Progressive Conservative | 1945 |
| Vancouver Centre | Ian Alistair Mackenzie (until 19 January 1948 Senate appointment) | Liberal | 1930 |
| Vancouver Centre | Rodney Young (by-election of 8 June 1948) | CCF | 1948 |
| Vancouver East | Angus MacInnis | CCF | 1930 |
| Vancouver North | James Sinclair ‡ | Liberal | 1940 |
| Vancouver South | Howard Charles Green | Progressive Conservative | 1935 |
| Victoria | Robert Mayhew ‡ | Liberal | 1937 |
| Yale | Grote Stirling (resigned 21 October 1947) | Progressive Conservative | 1924 |
| Yale | Owen Jones (by-election of 31 May 1948) | CCF | 1948 |

### Manitoba

| Electoral district | Name | Party | First elected/previously elected |
| Brandon | James Ewen Matthews | Liberal | 1938 |
| Churchill | Ronald Stewart Moore | CCF | 1945 |
| Dauphin | Fred Zaplitny | CCF | 1945 |
| Lisgar | Howard Winkler | Liberal | 1935 |
| Macdonald | William Gilbert Weir | Liberal-Progressive | 1930 |
| Marquette | James Allison Glen (resigned 4 November 1948) | Liberal | 1926, 1935 |
| Marquette | Stuart Garson (by-election of 20 December 1948) | Liberal | 1948 |
| Neepawa | John Bracken | Progressive Conservative | 1945 |
| Portage la Prairie | Harry Leader (died 9 May 1946) | Liberal | 1921, 1935 |
| Portage la Prairie | Calvert Charlton Miller (by-election of 21 October 1946) | Progressive Conservative | 1946 |
| Provencher | René Jutras | Liberal | 1940 |
| Selkirk | William Bryce | CCF | 1943 |
| Souris | J. Arthur Ross | Progressive Conservative | 1940 |
| Springfield | John Sinnott | Liberal | 1945 |
| St. Boniface | Fernand Viau | Liberal | 1945 |
| Winnipeg North | Alistair Stewart | CCF | 1940 |
| Winnipeg North Centre | Stanley Knowles | CCF | 1942 |
| Winnipeg South | Leslie Mutch ‡ | Liberal | 1935 |
| Winnipeg South Centre | Ralph Maybank ‡ | Liberal | 1935 |

### New Brunswick

| Electoral district | Name | Party | First elected/previously elected |
| Charlotte | A. Wesley Stuart | Liberal | 1945 |
| Gloucester | Clovis-Thomas Richard | Liberal | 1945 |
| Kent | Aurel Léger | Liberal | 1940 |
| Northumberland | John William Maloney | Liberal | 1945 |
| Restigouche—Madawaska | Benoît Michaud | Liberal | 1945 |
| Royal | Alfred Johnson Brooks | Progressive Conservative | 1935 |
| St. John—Albert | King Hazen | Progressive Conservative | 1940 |
| Victoria—Carleton | Heber Harold Hatfield | Progressive Conservative | 1940 |
| Westmorland | Henry Read Emmerson | Liberal | 1935 |
| York—Sunbury | Hedley Francis Gregory Bridges (died in office) | Liberal | 1945 |
| York—Sunbury | Milton Fowler Gregg (by-election of 20 October 1947) | Liberal | 1947 |

### Nova Scotia

| Electoral district | Name | Party | First elected/previously elected |
| Antigonish—Guysborough | J. Ralph Kirk | Liberal | 1936 |
| Cape Breton North and Victoria | Matthew MacLean | Liberal | 1937 |
| Cape Breton South | Clarence Gillis | CCF | 1940 |
| Colchester—Hants | Frank Thomas Stanfield | Progressive Conservative | 1945 |
| Cumberland | Percy Chapman Black | Progressive Conservative | 1940 |
| Digby—Annapolis—Kings | James Lorimer Ilsley (resigned 27 October 1948) | Liberal | 1926 |
| Digby—Annapolis—Kings | George Nowlan (by-election of 13 December 1948) | Progressive Conservative | 1948 |
| Halifax* | Gordon Benjamin Isnor | Liberal | 1935 |
| Halifax* | William Chisholm Macdonald ‡ (died 19 November 1946) | Liberal | 1940 |
| Halifax* | John Dickey (by-election of 14 July 1947, replaces Macdonald) | Liberal | 1947 |
| Inverness—Richmond | Moses Elijah McGarry | Liberal | 1940 |
| Pictou | Henry Byron McCulloch | Liberal | 1935 |
| Queens—Lunenburg | Robert Winters ‡ | Liberal | 1945 |
| Shelburne—Yarmouth—Clare | Loran Ellis Baker ‡ | Liberal | 1945 |

### Ontario

| Electoral district | Name | Party | First elected/previously elected |
| Algoma East | Thomas Farquhar (until 10 September 1948 Senate appointment) | Liberal | 1935 |
| Algoma East | Lester B. Pearson (by-election of 25 October 1948) | Liberal | 1948 |
| Algoma West | George E. Nixon | Liberal | 1940 |
| Brantford City | William Ross Macdonald | Liberal | 1935 |
| Brant | John A. Charlton | Progressive Conservative | 1945 |
| Broadview | Thomas Langton Church | Progressive Conservative | 1933 |
| Bruce | Andrew Ernest Robinson | Progressive Conservative | 1945 |
| Carleton | George Russell Boucher (resigned 1 November 1948) | Progressive Conservative | 1940 |
| Carleton | George Drew (by-election of 20 December 1948) | Progressive Conservative | 1948 |
| Cochrane | Joseph-Arthur Bradette | Liberal | 1926 |
| Danforth | Joseph Henry Harris | Progressive Conservative | 1921 |
| Davenport | John Ritchie MacNicol | Progressive Conservative | 1930 |
| Dufferin—Simcoe | William Earl Rowe | Progressive Conservative | 1925 |
| Durham | Charles Elwood Stephenson | Progressive Conservative | 1945 |
| Eglinton | Donald Fleming | Progressive Conservative | 1945 |
| Elgin | Charles Delmer Coyle | Progressive Conservative | 1945 |
| Essex East | Paul Martin Sr. | Liberal | 1935 |
| Essex South | Murray Clark | Liberal | 1935 |
| Essex West | Donald Ferguson Brown | Liberal | 1945 |
| Fort William | Dan McIvor | Liberal | 1935 |
| Frontenac—Addington | Wilbert Ross Aylesworth | Progressive Conservative | 1940 |
| Glengarry | William MacDiarmid (resigned 22 June 1945) | Liberal | 1940 |
| Glengarry | William Lyon Mackenzie King (by-election of 6 August 1945) | Liberal | 1908, 1919, 1921, 1926, 1945 |
| Greenwood | Denton Massey | Progressive Conservative | 1935 |
| Grenville—Dundas | Arza Clair Casselman | Progressive Conservative | 1921, 1925 |
| Grey—Bruce | Walter Harris | Liberal | 1940 |
| Grey North | W. Garfield Case | Progressive Conservative | 1945 |
| Haldimand | Mark Senn | Progressive Conservative | 1921 |
| Halton | Hughes Cleaver | Liberal | 1935 |
| Hamilton East | Thomas Hambly Ross | Liberal | 1940 |
| Hamilton West | Colin Gibson | Liberal | 1940 |
| Hastings—Peterborough | George Stanley White | Progressive Conservative | 1940 |
| Hastings South | George Henry Stokes | Progressive Conservative | 1940 |
| High Park | William Alexander McMaster | Progressive Conservative | 1945 |
| Huron North | Elston Cardiff | Progressive Conservative | 1940 |
| Huron—Perth | William Henry Golding | Liberal | 1932 |
| Kenora—Rainy River | William Moore Benidickson | Liberal | 1945 |
| Kent | Earl Desmond | Progressive Conservative | 1940 |
| Kingston City | Thomas Kidd | Progressive Conservative | 1945 |
| Lambton—Kent | Robert James Henderson | Progressive Conservative | 1945 |
| Lambton West | Joseph Warner Murphy | Progressive Conservative | 1945 |
| Lanark | William Gourlay Blair | Progressive Conservative | 1945 |
| Leeds | George Webb | Progressive Conservative | 1945 |
| Lincoln | Norman Lockhart | Progressive Conservative | 1935 |
| London | Park Manross | Progressive Conservative | 1945 |
| Middlesex East | Harry Oliver White | Progressive Conservative | 1945 |
| Middlesex West | Robert McCubbin ‡ | Liberal | 1940 |
| Muskoka—Ontario | James Macdonnell | Progressive Conservative | 1945 |
| Nipissing | Léo Gauthier | Liberal | 1945 |
| Norfolk | Theobald Butler Barrett | Progressive Conservative | 1945 |
| Northumberland | Earle Drope | Progressive Conservative | 1945 |
| Ontario | W. E. N. Sinclair (died in office) | Liberal | 1945 |
| Ontario | Arthur Henry Williams (by-election of 8 June 1948) | CCF | 1948 |
| Ottawa East | Jean-Thomas Richard | Liberal | 1945 |
| Ottawa West | George McIlraith ‡ | Liberal | 1940 |
| Oxford | Kenneth Daniel | Progressive Conservative | 1945 |
| Parkdale | Herbert Alexander Bruce (until resignation) | Progressive Conservative | 1940 |
| Parkdale | Harold Timmins (by-election of 21 October 1946) | Progressive Conservative | 1946 |
| Parry Sound | Wilfred McDonald | Liberal | 1945 |
| Peel | Gordon Graydon | Progressive Conservative | 1935 |
| Perth | Albert Bradshaw | Progressive Conservative | 1945 |
| Peterborough West | Gordon Fraser | Progressive Conservative | 1940 |
| Port Arthur | Clarence Decatur Howe | Liberal | 1935 |
| Prescott | Élie-Oscar Bertrand | Liberal | 1929 |
| Prince Edward—Lennox | George Tustin | Progressive Conservative | 1935 |
| Renfrew North | Ralph Warren | Liberal | 1937 |
| Renfrew South | James Joseph McCann | Liberal | 1935 |
| Rosedale | Harry Jackman | Progressive Conservative | 1940 |
| Russell | Joseph-Omer Gour | Liberal | 1945 |
| St. Paul's | Douglas Ross | Progressive Conservative | 1935 |
| Simcoe East | William Alfred Robinson | Liberal | 1945 |
| Simcoe North | Julian Ferguson | Progressive Conservative | 1945 |
| Spadina | David Croll | Liberal | 1945 |
| Stormont | Lionel Chevrier | Liberal | 1935 |
| Timiskaming | Walter Little | Liberal | 1935 |
| Trinity | Larry Skey | Progressive Conservative | 1945 |
| Victoria | Clayton Hodgson | Progressive Conservative | 1945 |
| Waterloo North | Louis Orville Breithaupt | Liberal | 1940 |
| Waterloo South | Karl Kenneth Homuth | Progressive Conservative | 1938 |
| Welland | Humphrey Mitchell | Liberal | 1931, 1942 |
| Wellington North | Lewis Menary | Progressive Conservative | 1945 |
| Wellington South | Robert Gladstone | Liberal | 1935 |
| Wentworth | Frank Lennard | Progressive Conservative | 1935, 1945 |
| York East | Robert Henry McGregor | Progressive Conservative | 1926 |
| York North | Jack Smith | Liberal | 1945 |
| York South | Alan Cockeram | Progressive Conservative | 1940, 1945 |
| York West | Agar Rodney Adamson | Progressive Conservative | 1940 |

### Prince Edward Island

| Electoral district | Name | Party | First elected/previously elected |
| King's | Thomas Vincent Grant | Liberal | 1935 |
| Prince | John Watson MacNaught ‡ | Liberal | 1945 |
| Queen's* | James Lester Douglas | Liberal | 1940 |
| Queen's* | Chester McLure | Progressive Conservative | 1930, 1945 |

### Quebec

| Electoral district | Name | Party | First elected/previously elected |
| Argenteuil | Georges Héon | Independent Progressive Conservative | 1938, 1945 |
| Beauce | Ludger Dionne | Liberal | 1945 |
| Beauharnois—Laprairie | Maxime Raymond | Bloc populaire canadien | 1925 |
| Bellechasse | Louis-Philippe Picard | Liberal | 1940 |
| Berthier—Maskinongé | Aldéric Laurendeau | Liberal | 1945 |
| Bonaventure | Bona Arsenault | Independent | 1945 |
| Brome—Missisquoi | Maurice Hallé | Liberal | 1940 |
| Cartier | Fred Rose (seat declared vacant 30 January 1947, by House of Commons) | Labor-Progressive | 1943 |
| Cartier | Maurice Hartt (by-election of 31 March 1947) | Liberal | 1947 |
| Chambly—Rouville | Roch Pinard | Liberal | 1945 |
| Champlain | Hervé-Edgar Brunelle | Liberal | 1935 |
| Chapleau | David Gourd | Liberal | 1945 |
| Charlevoix—Saguenay | Frédéric Dorion | Independent | 1942 |
| Châteauguay—Huntingdon | Donald Elmer Black | Liberal | 1935 |
| Chicoutimi | Paul-Edmond Gagnon | Independent | 1945 |
| Compton | Joseph-Adéodat Blanchette ‡ | Liberal | 1935 |
| Dorchester | Léonard Tremblay | Liberal | 1935 |
| Drummond—Arthabaska | Armand Cloutier | Liberal | 1940 |
| Gaspé | Léopold Langlois | Liberal | 1945 |
| Hochelaga | Raymond Eudes | Liberal | 1940 |
| Hull | Alphonse Fournier | Liberal | 1930 |
| Jacques Cartier | Elphège Marier | Liberal | 1939 |
| Joliette—l'Assomption—Montcalm | Georges-Émile Lapalme | Liberal | 1945 |
| Kamouraska | Eugène Marquis | Liberal | 1945 |
| Labelle | Maurice Lalonde | Liberal | 1935 |
| Lake St-John—Roberval | Joseph-Alfred Dion | Independent Liberal | 1945 |
| Laurier | Ernest Bertrand | Liberal | 1935 |
| Laval—Two Mountains | Liguori Lacombe (resigned 12 July 1948) | Independent | 1925, 1935 |
| Laval—Two Mountains | Léopold Demers (by-election of 20 December 1948) | Liberal | 1948 |
| Lévis | Maurice Bourget | Independent Liberal | 1940 |
| Lotbinière | Hugues Lapointe ‡ | Liberal | 1940 |
| Maisonneuve—Rosemont | Sarto Fournier | Liberal | 1935 |
| Matapédia—Matane | Philéas Côté | Independent Liberal | 1945 |
| Mégantic—Frontenac | Joseph Lafontaine | Liberal | 1940 |
| Mercier | Joseph Jean | Liberal | 1932 |
| Montmagny—L'Islet | Jean Lesage | Liberal | 1945 |
| Mount Royal | Fred Whitman | Liberal | 1940 |
| Nicolet—Yamaska | Lucien Dubois (died 8 November 1948) | Independent Liberal | 1930 |
| Nicolet—Yamaska | Renaud Chapdelaine (by-election of 7 February 1949) | Progressive Conservative | 1949 |
| Outremont | Édouard Rinfret | Liberal | 1945 |
| Pontiac | Wallace McDonald (died 2 May 1946) | Liberal | 1935 |
| Pontiac | Réal Caouette (by-election of 16 September 1946) | Social Credit | 1946 |
| Portneuf | Pierre Gauthier | Liberal | 1936 |
| Québec—Montmorency | Wilfrid Lacroix | Independent Liberal | 1935 |
| Quebec East | Louis St. Laurent | Liberal | 1942 |
| Quebec South | Charles Gavan Power | Liberal | 1917 |
| Quebec West and South | Charles Parent | Independent Liberal | 1935 |
| Richelieu—Verchères | Arthur Cardin (died 21 October 1946) | Independent | 1911 |
| Richelieu—Verchères | Gérard Cournoyer (by-election of 23 December 1946) | Liberal | 1946 |
| Richmond—Wolfe | James Patrick Mullins | Liberal | 1935 |
| Rimouski | Gleason Belzile ‡ | Liberal | 1945 |
| St. Ann | Thomas Healy | Liberal | 1940 |
| St. Antoine—Westmount | Douglas Abbott | Liberal | 1940 |
| St. Denis | Azellus Denis | Liberal | 1935 |
| St. Henry | Joseph-Arsène Bonnier | Liberal | 1938 |
| St. Hyacinthe—Bagot | Joseph Fontaine | Liberal | 1945 |
| St. James | Roland Beaudry | Liberal | 1945 |
| St. Johns—Iberville—Napierville | Alcide Côté | Liberal | 1945 |
| St. Lawrence—St. George | Brooke Claxton | Liberal | 1940 |
| St. Mary | Gaspard Fauteux (†) | Liberal | 1942 |
| St-Maurice—Laflèche | René Hamel | Bloc populaire canadien | 1945 |
| Shefford | Marcel Boivin | Liberal | 1945 |
| Sherbrooke | Maurice Gingues | Liberal | 1940 |
| Stanstead | John Thomas Hackett | Progressive Conservative | 1930, 1945 |
| Témiscouata | Jean-François Pouliot | Independent Liberal | 1924 |
| Témiscouata | Jean-François Pouliot | Liberal | 1924 |
| Terrebonne | Lionel Bertrand | Liberal | 1940 |
| Trois-Rivières | Wilfrid Gariépy | Independent | 1935, 1945 |
| Vaudreuil—Soulanges | Louis-René Beaudoin | Liberal | 1945 |
| Verdun | Paul-Émile Côté ‡ | Liberal | 1940 |
| Wright | Léon Raymond | Liberal | 1945 |

### Saskatchewan

| Electoral district | Name | Party | First elected/previously elected |
| Assiniboia | Edward McCullough | CCF | 1945 |
| Humboldt | Joseph William Burton | CCF | 1935 |
| Kindersley | Frank Jaenicke | CCF | 1945 |
| Lake Centre | John Diefenbaker | Progressive Conservative | 1940 |
| Mackenzie | Alexander Malcolm Nicholson | CCF | 1940 |
| Maple Creek | Duncan John McCuaig | CCF | 1945 |
| Melfort | Percy Wright | CCF | 1940 |
| Melville | James Garfield Gardiner | Liberal | 1936 |
| Moose Jaw | Ross Thatcher | CCF | 1945 |
| North Battleford | Frederick Townley-Smith | CCF | 1945 |
| Prince Albert | Edward LeRoy Bowerman | CCF | 1945 |
| Qu'Appelle | Gladys Strum | CCF | 1945 |
| Regina City | John Probe | CCF | 1945 |
| Rosetown—Biggar | Major James Coldwell | CCF | 1935 |
| Rosthern | Walter Tucker ‡ (resigned 8 June 1948) | Liberal | 1935 |
| Rosthern | William Albert Boucher (by-election of 25 October 1948) | Liberal | 1948 |
| Saskatoon City | Roy Knight | CCF | 1945 |
| Swift Current | Thomas John Bentley | CCF | 1945 |
| The Battlefords | Max Campbell | CCF | 1945 |
| Weyburn | Eric McKay | CCF | 1945 |
| Wood Mountain | Hazen Argue | CCF | 1945 |
| Yorkton | George Hugh Castleden | CCF | 1940 |

### Yukon

| Electoral district | Electoral district | Name | Party | First elected/previously elected |
| Yukon | | George Black | Progressive Conservative | 1921, 1940 |

## By-elections

| By-election | Date | Incumbent | Party | Winner | Party | Cause | Retained |
| Nicolet—Yamaska | February 7, 1949 | Lucien Dubois | Independent Liberal | Renaud Chapdelaine | Progressive Conservative | Death | No |
| Carleton | December 20, 1948 | George Russell Boucher | Progressive Conservative | George A. Drew | Progressive Conservative | Resignation to provide a seat for Drew | Yes |
| Laval—Two Mountains | December 20, 1948 | Liguori Lacombe | Independent | Léopold Demers | Liberal | Resignation | No |
| Marquette | December 20, 1948 | James Allison Glen | Liberal | Stuart Sinclair Garson | Liberal | Resignation | Yes |
| Digby—Annapolis—Kings | December 13, 1948 | James Lorimer Ilsley | Liberal | George Clyde Nowlan | Progressive Conservative | Resignation | No |
| Algoma East | October 25, 1948 | Thomas Farquhar | Liberal | Lester B. Pearson | Liberal | Called to the Senate | Yes |
| Rosthern | October 25, 1948 | Walter Adam Tucker | Liberal | William Albert Boucher | Liberal | Resignation | Yes |
| Ontario | June 8, 1948 | W. E. N. Sinclair | Liberal | Arthur Henry Williams | CCF | Death | No |
| Vancouver Centre | June 8, 1948 | Ian Alistair Mackenzie | Liberal | Rodney Young | CCF | Called to the Senate | No |
| Yale | May 31, 1948 | Grote Stirling | Progressive Conservative | Owen Lewis Jones | CCF | Resignation | No |
| York—Sunbury | October 20, 1947 | H. Francis G. Bridges | Liberal | Milton Gregg | Liberal | Death | Yes |
| Halifax | July 14, 1947 | William Chisholm Macdonald | Liberal | John Dickey | Liberal | Death | Yes |
| Cartier | March 31, 1947 | Fred Rose | Labor-Progressive | Maurice Hartt | Liberal | Seat declared vacant by resolution of the House of Commons | No |
| Richelieu—Verchères | December 23, 1946 | Arthur Cardin | Independent | Gérard Cournoyer | Liberal | Death | No |
| Parkdale | October 21, 1946 | Herbert A. Bruce | Progressive Conservative | Harold Timmins | Progressive Conservative | Resignation | Yes |
| Portage la Prairie | October 21, 1946 | Harry Leader | Liberal | Calvert Charlton Miller | Progressive Conservative | Death | No |
| Pontiac | September 16, 1946 | Wallace McDonald | Liberal | Réal Caouette | Social Credit | Death | No |
| Glengarry | August 6, 1945 | William B. MacDiarmid | Liberal | William Lyon Mackenzie King | Liberal | Resignation to provide a seat for Mackenzie King | Yes |