By-election | Date | Incumbent | Party | Winner | Party | Cause | Retained |
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Yale District | December 19, 1871 | New seat | Charles Frederick Houghton | CA|Liberal|background}}| | Liberal | New riding as a result of British Columbia joining Confederation. | NA |
Cariboo | December 19, 1871 | New seat | Joshua Spencer Thompson | CA|Conservative (historical)|background}}| | Liberal-Conservative | New riding as a result of British Columbia joining Confederation. | NA |
Vancouver Island | December 15, 1871 | New seat | Robert Wallace | CA|Conservative (historical)|background}}| | Conservative | New riding as a result of British Columbia joining Confederation. | NA |
New Westminster | December 13, 1871 | New seat | Hugh Nelson | CA|Conservative (historical)|background}}| | Liberal-Conservative | New riding as a result of British Columbia joining Confederation. | NA |
Victoria | November 24, 1871 | New seat | Henry Nathan, Jr. and Amor De Cosmos | CA|Liberal|background}}| | Liberal | New riding as a result of British Columbia joining Confederation. Two MPs elected | NA |
Brome | November 17, 1871 | Christopher Dunkin | CA|Conservative (historical)|background}}| | Conservative | Edward Carter | CA|Conservative (historical)|background}}| | Conservative | Appointed to the Superior Court of Quebec | Yes |
Compton | November 11, 1871 | John Henry Pope | CA|Conservative (historical)|background}}| | Conservative | John Henry Pope | CA|Conservative (historical)|background}}| | Conservative | Recontested upon appointment as Minister of Agriculture | Yes |
Montcalm | September 15, 1871 | Joseph Dufresne | CA|Conservative (historical)|background}}| | Conservative | Firmin Dugas | CA|Conservative (historical)|background}}| | Conservative | Appointed Sheriff of the County of St. John | Yes |
Algoma | June 30, 1871 | Wemyss Mackenzie Simpson | CA|Conservative (historical)|background}}| | Conservative | Frederick William Cumberland | CA|Conservative (historical)|background}}| | Conservative | Appointed Indian Commissioner for the North | Yes |
Hastings East | March 20, 1871 | Robert Read | CA|Conservative (historical)|background}}| | Conservative | John White | CA|Conservative (historical)|background}}| | Conservative | Called to the Senate | Yes |
Provencher | March 3, 1871 | New seat | Pierre Delorme | CA|Conservative (historical)|background}}| | Conservative | New riding as a result of Manitoba joining Confederation. | NA |
Selkirk | March 2, 1871 | New seat | Donald Alexander Smith | CA|Independent Conservative|background}}| | Independent Conservative | New riding as a result of Manitoba joining Confederation. | NA |
Lisgar | March 2, 1871 | New seat | John Christian Schultz | CA|Conservative (historical)|background}}| | Conservative | New riding as a result of Manitoba joining Confederation. | NA |
Marquette | March 2, 1871 | New seat | James S. Lynch and Angus McKay | Liberal and Conservative | New riding as a result of Manitoba joining Confederation. Two MPs elected due to a tie. | NA |
Restigouche | November 29, 1870 | William Murray Caldwell | CA|Liberal|background}}| | Liberal | George Moffat, Sr. | CA|Conservative (historical)|background}}| | Conservative | Appointed Inspector of Post Offices in New Brunswick | No |
Richelieu | November 18, 1870 | Thomas McCarthy | CA|Conservative (historical)|background}}| | Conservative | Georges Isidore Barthe | CA|Independent Conservative|background}}| | Independent Conservative | Death | No |
Colchester | November 8, 1870 | Adams George Archibald | CA|Conservative (historical)|background}}| | Liberal-Conservative | Frederick M. Pearson | CA|Liberal|background}}| | Liberal | Appointed Lieutenant-Governor of Manitoba and the North-West Territories | No |
St. Hyacinthe | September 1, 1870 | Alexandre-Édouard Kierzkowski | CA|Liberal|background}}| | Liberal | Louis Delorme | CA|Liberal|background}}| | Liberal | Death | Yes |
Bellechasse | August 15, 1870 | Louis-Napoléon Casault | CA|Conservative (historical)|background}}| | Conservative | Télesphore Fournier | CA|Liberal|background}}| | Liberal | Appointed to Superior Court of Quebec | No |
Quebec East | July 18, 1870 | Pierre-Gabriel Huot | CA|Liberal|background}}| | Liberal | Adolphe Guillet dit Tourangeau | CA|Conservative (historical)|background}}| | Conservative | Appointed Postmaster at Quebec | No |
Missisquoi | July 5, 1870 | Brown Chamberlin | CA|Conservative (historical)|background}}| | Conservative | George Barnard Baker | CA|Conservative (historical)|background}}| | Liberal-Conservative | Appointed Queen's Printer | Yes |
Kings | June 23, 1870 | William Henry Chipman | CA|Anti-Confederation|background}}| | Anti-Confederate | Leverett de Veber Chipman | CA|Liberal|background}}| | Liberal | Death | No |
Cumberland | June 15, 1870 | Charles Tupper | CA|Conservative (historical)|background}}| | Conservative | Charles Tupper | CA|Conservative (historical)|background}}| | Conservative | Recontested upon appointment as President of the Privy Council | Yes |
Frontenac | April 27, 1870 | Thomas Kirkpatrick | CA|Conservative (historical)|background}}| | Conservative | George Airey Kirkpatrick | CA|Conservative (historical)|background}}| | Conservative | Death | Yes |
Brome | November 29, 1869 | Christopher Dunkin | CA|Conservative (historical)|background}}| | Conservative | Christopher Dunkin | CA|Conservative (historical)|background}}| | Conservative | Recontested upon appointment as Minister of Agriculture | Yes |
Lanark South | November 29, 1869 | Alexander Morris | CA|Conservative (historical)|background}}| | Conservative | Alexander Morris | CA|Conservative (historical)|background}}| | Conservative | Recontested upon appointment as Minister of Inland Revenue | Yes |
Renfrew South | November 29, 1869 | Daniel McLachlin | CA|Liberal|background}}| | Liberal | John Lorn McDougall | CA|Liberal|background}}| | Liberal | Resignation | Yes |
Renfrew North | November 13, 1869 | John Rankin | CA|Conservative (historical)|background}}| | Liberal-Conservative | Francis Hincks | CA|Conservative (historical)|background}}| | Conservative | Resignation to provide a seat for Hincks | Yes |
Huntingdon | October 30, 1869 | John Rose | CA|Conservative (historical)|background}}| | Liberal-Conservative | Julius Scriver | CA|Liberal|background}}| | Liberal | Resignation to move to London where he acted as the Prime Minister's unofficial representative to the UK. | No |
Colchester | September 9, 1869 | Archibald McLelan | CA|Anti-Confederation|background}}| | Anti-Confederate | Adams George Archibald | CA|Conservative (historical)|background}}| | Liberal-Conservative | Called to the Senate | No |
L'Islet | July 14, 1869 | Barthélemy Pouliot | CA|Conservative (historical)|background}}| | Conservative | Barthélemy Pouliot | CA|Conservative (historical)|background}}| | Conservative | Election annulled | Yes |
Wellington Centre | July 12, 1869 | Thomas Sutherland Parker | CA|Liberal|background}}| | Liberal | James Ross | CA|Liberal|background}}| | Liberal | Death | Yes |
Hants | April 24, 1869 | Joseph Howe | CA|Anti-Confederation|background}}| | Anti-Confederate | Joseph Howe | CA|Conservative (historical)|background}}| | Liberal-Conservative | Recontested upon appointment as President of the Privy Council | No |
Yarmouth | April 20, 1869 | Thomas Killam | CA|Anti-Confederation|background}}| | Anti-Confederate | Frank Killam | CA|Liberal|background}}| | Liberal | Death | No |
Richmond | April 20, 1869 | William Joseph Croke | CA|Anti-Confederation|background}}| | Anti-Confederate | Isaac LeVesconte | CA|Conservative (historical)|background}}| | Conservative | Death | No |
Kamouraska | February 17, 1869 | Vacant | Charles Alphonse Pantaléon Pelletier | CA|Liberal|background}}| | Liberal | No election held in 1867 due to riots | NA |
Northumberland | December 24, 1868 | John Mercer Johnson | CA|Liberal|background}}| | Liberal | Richard Hutchison | CA|Liberal|background}}| | Liberal | Death | Yes |
Saint Maurice | October 30, 1868 | Louis-Léon Lesieur Desaulniers | CA|Conservative (historical)|background}}| | Conservative | Élie Lacerte | CA|Conservative (historical)|background}}| | Conservative | Appointed inspector of prisons and asylums in Quebec | Yes |
York | October 28, 1868 | Charles Fisher | CA|Liberal|background}}| | Liberal | John Pickard | CA|Independent Liberal|background}}| | Independent Liberal | Appointed to New Brunswick Supreme Court | No |
Three Rivers | October 17, 1868 | Louis-Charles Boucher de Niverville | CA|Conservative (historical)|background}}| | Conservative | William McDougall | CA|Conservative (historical)|background}}| | Conservative | Appointed sheriff for the district of Trois-Rivières | Yes |
York West | August 14, 1868 | William Pearce Howland | CA|Conservative (historical)|background}}| | Liberal-Conservative | Amos Wright | CA|Liberal|background}}| | Liberal | Appointed Lieutenant-Governor of Ontario | No |
Montreal West | April 20, 1868 | Thomas D'Arcy McGee | CA|Conservative (historical)|background}}| | Liberal-Conservative | Michael Patrick Ryan | CA|Conservative (historical)|background}}| | Liberal-Conservative | Death (assassinated) | Yes |
Lincoln | April 13, 1868 | James Rea Benson | CA|Conservative (historical)|background}}| | Liberal-Conservative | Thomas Rodman Merritt | CA|Liberal|background}}| | Liberal | Called to the Senate | No |
Restigouche | March 13, 1868 | John McMillan | CA|Liberal|background}}| | Liberal | William Murray Caldwell | CA|Liberal|background}}| | Liberal | Appointed Inspector of Post Offices in New Brunswick | Yes |
Montmorency | December 11, 1867 | Joseph Cauchon | CA|Conservative (historical)|background}}| | Conservative | Jean Langlois | CA|Conservative (historical)|background}}| | Conservative | Called to the Senate | Yes |
Huntingdon | November 28, 1867 | John Rose | CA|Conservative (historical)|background}}| | Liberal-Conservative | John Rose | CA|Conservative (historical)|background}}| | Liberal-Conservative | Recontested upon appointment as Minister of Finance | Yes |