# By-elections to the 17th Canadian Parliament

By-elections to the 17th Canadian Parliament were held to elect members of the House of Commons of Canada between the 1930 federal election and the 1935 federal election. The Conservative Party of Canada led a majority government for the 17th Canadian Parliament.
The list includes Ministerial by-elections which occurred due to the requirement that Members of Parliament recontest their seats upon being appointed to Cabinet. These by-elections were almost always uncontested. This requirement was abolished in 1931.
| By-election | Date | Incumbent | Party | Winner | Party | Cause | Retained |
| Frontenac—Addington | September 24, 1934 | William Spankie | Conservative | Colin Campbell | Liberal | Death | No |
| Toronto East | September 24, 1934 | Edmond Baird Ryckman | Conservative | Thomas Langton Church | Conservative | Death | Yes |
| Kenora—Rainy River | September 24, 1934 | Peter Heenan | Liberal | Hugh McKinnon | Liberal | Resignation | Yes |
| Elgin West | September 24, 1934 | Mitchell Hepburn | Liberal | Wilson Mills | Liberal | Resignation | Yes |
| York North | September 24, 1934 | Thomas Herbert Lennox | Conservative | William Pate Mulock | Liberal | Death | No |
| Oxford South | April 16, 1934 | Thomas Merritt Cayley | Liberal | Almon Rennie | Liberal | Death | Yes |
| Yamaska | October 23, 1933 | Aimé Boucher | Liberal | Aimé Boucher | Liberal | Election declared void | Yes |
| Mackenzie | October 23, 1933 | Milton Neil Campbell | Progressive | John Angus MacMillan | Liberal | Appointed vice-president of the Tariff Board | No |
| Restigouche—Madawaska | October 23, 1933 | Maxime Cormier | Conservative | Joseph Michaud | Liberal | Death | No |
| Huron South | October 3, 1932 | Thomas McMillan | Liberal | William Henry Golding | Liberal | Death | Yes |
| Maisonneuve | June 27, 1932 | Clément Robitaille | Liberal | Joseph Jean | Liberal | Death | Yes |
| Royal | June 27, 1932 | George Burpee Jones | Conservative | George Burpee Jones | Conservative | Resignation | Yes |
| Athabaska | March 21, 1932 | John Francis Buckley | Liberal | Percy Griffith Davies | Conservative | Death | No |
| Three Rivers—St. Maurice | August 10, 1931 | Arthur Bettez | Liberal | Charles Bourgeois | Conservative | Death | No |
| Hamilton East | August 10, 1931 | George Septimus Rennie | Conservative | Humphrey Mitchell | Labour | Death | No |
| Richmond—West Cape Breton | September 2, 1930 | John Alexander Macdonald | Conservative | Edgar Nelson Rhodes | Conservative | Resignation to provide a seat for Rhodes | Yes |
| Melfort | August 25, 1930 | Robert Weir | Conservative | Robert Weir | Conservative | Recontested upon appointment as Minister of Agriculture. | Yes |
| Oxford North | August 25, 1930 | Donald Matheson Sutherland | Conservative | Donald Matheson Sutherland | Conservative | Recontested upon appointment as Minister of National Defence. | Yes |
| Leeds | August 25, 1930 | Hugh Alexander Stewart | Conservative | Hugh Alexander Stewart | Conservative | Recontested upon appointment as Minister of Public Works. | Yes |
| Kootenay East | August 25, 1930 | Michael Dalton McLean | Conservative | Henry Herbert Stevens | Conservative | Resignation to provide a seat for Stevens | Yes |
| Laval—Two Mountains | August 25, 1930 | Arthur Sauvé | Conservative | Arthur Sauvé | Conservative | Recontested upon appointment as Postmaster General. | Yes |
| Toronto East | August 25, 1930 | Edmond Baird Ryckman | Conservative | Edmond Baird Ryckman | Conservative | Recontested upon appointment as Minister of National Revenue. | Yes |
| Neepawa | August 25, 1930 | Thomas Gerow Murphy | Conservative | Thomas Gerow Murphy | Conservative | Recontested upon appointment as Minister of the Interior. | Yes |
| Fort William | August 25, 1930 | Robert James Manion | Conservative | Robert James Manion | Conservative | Recontested upon appointment as Minister of Railways and Canals. | Yes |
| St. John—Albert | August 25, 1930 | Murray MacLaren | Conservative | Murray MacLaren | Conservative | Recontested upon appointment as Minister of Pensions and National Health. | Yes |
| Wellington South | August 25, 1930 | Hugh Guthrie | Conservative | Hugh Guthrie | Conservative | Recontested upon appointment as Minister of Justice. | Yes |
| Timiskaming South | August 25, 1930 | Wesley Gordon | Conservative | Wesley Gordon | Conservative | Recontested upon appointment as Minister of Immigration and Colonization and Minister of Mines. | Yes |
| Chambly—Verchères | August 25, 1930 | Alfred Duranleau | Conservative | Alfred Duranleau | Conservative | Recontested upon appointment as Minister of Marine. | Yes |
| Quebec West | August 25, 1930 | Maurice Dupré | Conservative | Maurice Dupré | Conservative | Recontested upon appointment as Solicitor General. | Yes |
| St. Lawrence—St. George | August 25, 1930 | Charles Cahan | Conservative | Charles Cahan | Conservative | Recontested upon appointment as Secretary of State of Canada. | Yes |
| Calgary West | August 25, 1930 | R. B. Bennett | Conservative | R. B. Bennett | Conservative | Recontested upon appointment as Prime Minister and Minister of Finance. | Yes |