| Jurisdiction: | CA |
| #: | 21st |
| Type: | Majority |
| Houseimage: | Chambre des Communes 1949.png |
| Status: | inactive |
| Term-Begin: | 1949-09-15 |
| Term-End: | 1953-05-14 |
| Pm: | Louis St. Laurent |
| Ministry: | 17th Canadian Ministry |
| Pm-Begin: | 1948-11-15 |
| Pm-End: | 1957-06-21 |
| Lo: | George A. Drew |
| Party: | Liberal Party |
| Party2: | Progressive Conservative Party |
| Party3: | Co-operative Commonwealth Federation |
| Party4: | Social Credit Party |
| Unrecparty1: | Liberal-Labour |
| Unrecparty2: | Liberal-Progressive |
| Sc: | William Ross Macdonald |
| Sessionbegin: | 1949-09-15 |
| Sessionend: | 1949-12-10 |
| Sessionbegin2: | 1950-02-16 |
| Sessionend2: | 1950-06-30 |
| Sessionbegin3: | 1950-08-29 |
| Sessionend3: | 1951-01-29 |
| Sessionbegin4: | 1951-01-30 |
| Sessionend4: | 1951-10-09 |
| Sessionbegin5: | 1951-10-09 |
| Sessionend5: | 1951-12-29 |
| Sessionbegin6: | 1952-02-28 |
| Sessionend6: | 1952-11-20 |
| Sessionbegin7: | 1952-11-20 |
| Sessionend7: | 1953-05-14 |
| Monarchterm: | 6 December 1936 – 6 February 1952 |
| Monarch2: | Elizabeth II |
| Monarchterm2: | 6 February 1952 – 8 September 2022 |
| Members: | 262 |
| Senators: | 102 |
| Lastparl: | 20th |
| Nextparl: | 22nd |
The 21st Canadian Parliament was in session from September 15, 1949, until June 13, 1953. The membership was set by the 1949 federal election on June 27, 1949, and it changed only somewhat due to resignations and by-elections until it was dissolved prior to the 1953 election.
It was controlled by a Liberal Party majority under Prime Minister Louis St. Laurent and the 17th Canadian Ministry. The Official Opposition was the Progressive Conservative Party, led by George Drew.
The Speaker was William Ross Macdonald. See also List of Canadian electoral districts 1947-1952 for a list of the ridings in this parliament.
Following is a full list of members of the twenty-first Parliament listed first by province, then by electoral district.
Electoral districts denoted by an asterisk (*) indicates that district was represented by two members.
| Electoral district | Name | width=20% | Party | ||
|---|---|---|---|---|---|
| width=24% | Charlotte | Andrew Wesley Stuart | Liberal | ||
| Gloucester | Clovis-Thomas Richard (until 5 March 1952 emoulment appointment) | Liberal | |||
| Albany M. Robichaud (by-election of 1952-05-26) | Progressive Conservative | ||||
| Kent | Aurel D. Léger | Liberal | |||
| Northumberland | George Roy McWilliam | Liberal | |||
| Restigouche—Madawaska | Benoît Michaud | Liberal | |||
| Paul-Léon Dubé (by-election of 1949-10-24) | Independent Liberal | ||||
| Royal | Alfred Johnson Brooks | Progressive Conservative | |||
| St. John—Albert | Daniel Aloysius Riley | Liberal | |||
| Victoria—Carleton | Heber Harold Hatfield | Progressive Conservative | |||
| Gage Montgomery (by-election of 26 May 1952) | Progressive Conservative | ||||
| Westmorland | Edmund William George | Liberal | |||
| York—Sunbury | Milton Fowler Gregg | Liberal |
| Electoral district | Name | width=20% | Party | |||
|---|---|---|---|---|---|---|
| width=24% | Yukon—Mackenzie River | James Aubrey Simmons | Liberal |
| Electoral district | Name | width=20% | Party | ||
|---|---|---|---|---|---|
| width=24% rowspan=2 | Annapolis—Kings | Angus Alexander Elderkin (until election voided 6 March 1950) | Liberal | ||
| George Nowlan (by-election of 1950-06-19) | Progressive Conservative | ||||
| Antigonish—Guysborough | J. Ralph Kirk | Liberal | |||
| Cape Breton North and Victoria | Matthew MacLean | Liberal | |||
| Cape Breton South | Clarence Gillis | C.C.F. | |||
| Colchester—Hants | Frank Thomas Stanfield | Progressive Conservative | |||
| Cumberland | Percy Chapman Black | Progressive Conservative | |||
| Digby—Yarmouth | Thomas Andrew Murray Kirk | Liberal | |||
| Halifax | John Horace Dickey (until 2 May 1950 Senate appointment) | Liberal | |||
| Gordon Benjamin Isnor | Liberal | ||||
| Samuel Rosborough Balcom (by-election of 1950-06-19, replaces Dickey) | Liberal | ||||
| Inverness—Richmond | William F. Carroll | Liberal | |||
| Lunenburg | Robert Winters | Liberal | |||
| Pictou | Henry Byron McCulloch | Liberal | |||
| Queens—Shelburne | Donald Smith | Liberal |
| Electoral district | Name | width=20% | Party | ||
|---|---|---|---|---|---|
| width=24% | King's | Thomas Joseph Kickham | Liberal | ||
| Prince | John Watson Macnaught | Liberal | |||
| Queen's | James Lester Douglas (died 30 September 1950) | Liberal | |||
| Winfield Chester Scott McLure | Progressive Conservative | ||||
| John Angus Maclean (by-election of 1951-06-25, replaces Douglas) | Progressive Conservative |
See main article: By-elections to the 21st Canadian Parliament.