# List of Northwest Territories by-elections

The list of Northwest Territories by-elections includes every by-election held in the Canadian territory of the Northwest Territories. 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 the legislative assembly. Incumbent members were required to recontest their seats upon being appointed to Cabinet. Nearly all of these Ministerial by-elections were uncontested.

## 19th Northwest Territories Legislative Assembly 2019–2023

| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause | Retained |
| Tu Nedhé-Wiilideh | February 8, 2022 | Steve Norn | | Non-partisan consensus government | Richard Edjericon | | Non-partisan consensus government | Resignation | Yes |
| Monfwi | July 27, 2021 | Jackson Lafferty | | Non-partisan consensus government | Jane Weyallon Armstrong | | Non-partisan consensus government | Resignation | Yes |

## 15th Northwest Territories Legislative Assembly 2003–2007

| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause | Retained |
| North Slave | July 18, 2005 | Henry Zoe | | Non-partisan consensus government | Jackson Lafferty | | Non-partisan consensus government | Resignation | Yes |
| Inuvik Twin Lakes | July 18, 2004 | Roger Allen | | Non-partisan consensus government | Robert C. McLeod | | Non-partisan consensus government | Resignation | Yes |

## 9th Northwest Territories Legislative Assembly 1979–1983

| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause | Retained |
| Baffin Central | September 15, 1980 | James Arreak | | Non-partisan consensus government | Ipeelee Kilabuk | | Non-partisan consensus government | Resignation | No |

## 8th Northwest Territories Legislative Assembly 1975–1979

| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause | Retained |
| Mackenzie–Great Bear | June 14, 1976 | George Barnaby | | Non-partisan consensus government | Peter Fraser | | Non-partisan consensus government | Resignation | Yes |
| Great Slave Lake | June 9, 1976† | James Wah-Shee | | Non-partisan consensus government | Richard D. J. Whitford | | Non-partisan consensus government | Resignation | No |
† Won by acclamation; this date is the date of the return of the writ.

## 6th Northwest Territories Legislative Council 1967–1970

| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause | Retained |
| Mackenzie River | January 2, 1969 | Bill Berg | | Non-partisan consensus government | Mark Duane Fairbrother | | Non-partisan consensus government | Death | No |

## 5th Northwest Territories Legislative Council 1964–1967

| By-election | Date | Incumbent | Party | Party | Winner | Party | Cause | Retained |
| Eastern Arctic | September 19, 1966 | District created | — | — | Simonie Michael | Non-partisan consensus government | New electoral district | Yes |
| Central Arctic | July 14, 1966† | District created | — | — | Duncan Pryde | Non-partisan consensus government | New electoral district | Yes |
| Keewatin | July 14, 1966† | District created | — | — | Robert Williamson | Non-partisan consensus government | New electoral district | Yes |
† Won by acclamation; this date is the date of the return of the writ.

## 4th Northwest Territories Legislative Council 1960–1964

| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause | Retained |
| Mackenzie South | July 23, 1962 | Ayliffe "Pat" Carey | | Non-partisan consensus government | Paul William Kaeser | | Non-partisan consensus government | Resignation | No |

## 3rd Northwest Territories Legislative Council 1957–1960

| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause | Retained |
| Mackenzie North | October 5, 1959† | John Goodall | | Non-partisan consensus government | Ernest James "Scotty" Gall | | Non-partisan consensus government | Unknown | Yes |
† Won by acclamation; this date is the date of the return of the writ.

## 5th North-West Legislative Assembly 1902–1905

| By-election | Date | Incumbent | Party | Winner | Party | Cause | Retained |
| St. Albert | June 9, 1903 | Daniel Maloney | Independent | Louis Joseph Alphonse Lambert | Independent | Unseated due to bribery | No |
| Wolseley | February 18, 1903† | William Elliott | Independent | William Elliott | Independent | Unknown | Yes |
| Banff | February 4, 1903 | Arthur Sifton | Liberal-Conservative | Charles W. Fisher | Liberal | Resignation | Yes |
| Saskatoon | December 9, 1902 | William Henry Sinclair | Independent | James Clinkskill | Independent | Unknown | No |
† Won by acclamation; this date is the date of the return of the writ.

## 4th North-West Legislative Assembly 1898–1902

| By-election | Date | Incumbent | Party | Winner | Party | Cause | Retained |
| Banff | March 22, 1901† | Arthur Sifton | Liberal-Conservative | Arthur Sifton | Liberal-Conservative | Ministerial appointment | Yes |
| Grenfell | March 22, 1901 | Richard Stuart Lake | Liberal-Conservative | Richard Stuart Lake | Liberal-Conservative | Sought re-election after failing to enter federal politics | Yes |
| Moose Jaw | March 22, 1901 | James Hamilton Ross | Independent | George Malcolm Annable | Independent | Unknown | Yes |
| West Calgary | March 22, 1901 | R. B. Bennett | Independent | R. B. Bennett | Independent | Resignation | Yes |
| Banff | June 27, 1899 | Robert Brett | Liberal | Arthur Sifton | Liberal-Conservative | Invalidation of the 1898 result | Yes |
† Won by acclamation; this date is the date of the return of the writ.

## 3rd North-West Legislative Assembly 1894–1898

| By-election | Date | Incumbent | Party | Winner | Party | Cause | Retained |
| Lethbridge | October 26, 1897† | Charles Alexander Magrath | Independent | Charles Alexander Magrath | Independent | Unknown | No |
| Macleod | October 26, 1897† | Frederick Haultain | Independent | Frederick Haultain | Independent | Confirmation as Premier | Yes |
| Mitchell | October 26, 1897† | Hilliard Mitchell | Independent | Hilliard Mitchell | Independent | Unknown | Yes |
| Moose Jaw | October 26, 1897† | James Hamilton Ross | Independent | James Hamilton Ross | Independent | Confirmation as Territorial Secretary, Territorial Treasurer, Minister of Public Works, and Minister of Agriculture | Yes |
| South Qu'Appelle | October 26, 1897† | George H. V. Bulyea | Independent | George H. V. Bulyea | Independent | Unknown | Yes |
| Yorkton | October 26, 1897† | Fredrik Robert Insinger | Independent | Thomas Alfred Patrick | Independent | Unknown | Yes |
| Prince Albert West | July 7, 1897 | John Lestock Reid | Independent | Thomas James Agnew | Independent | Unknown | No |
| North Qu'Appelle | December 7, 1896 | William Sutherland | Independent | Donald H. McDonald | Independent | Unknown | Yes |
| Edmonton | August 4, 1896 | Frank Oliver | Independent | Matthew McCauley | Independent | Resignation | No |
† Won by acclamation; this date is the date of the return of the writ.

## 2nd North-West Legislative Assembly 1891–1894

| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause | Retained |
| Whitewood | February 16, 1894 | Daniel Campbell | | Independent | Joseph Clementson | | Independent | Unknown | No |
| Wallace | November 12, 1892 | Joel Reaman | | Independent | Fredrik Robert Insinger | | Independent | Unknown | No |

## 1st Council of the North-West Territories 1876–1888

| By-election | Date | Incumbent | Party | Party | Winner | Party | Cause | Retained |
| Macleod | September 5, 1887 | Richard Henry Boyle | | Independent | Frederick Haultain | Independent | Resignation | Yes |
| Qu'Appelle | May 24, 1887 | Robert Crawford | | Independent | William Sutherland | Independent | Resignation | Yes |
| Qu'Appelle | October 14, 1886 | Thomas Wesley Jackson | | Independent | Robert Crawford | Independent | Resignation | Yes |
| Calgary | July 14, 1886 | James Davidson Geddes | | Independent | John D. Lauder | Independent | Resignation | No |
| Calgary | July 14, 1886 | James Davidson Geddes | | Independent | Hugh Cayley | Independent | Resignation | Yes |
| Moose Mountain | July 8, 1886 | John Gillanders Turriff | | Independent | John Gillanders Turriff | Independent | Unknown | Yes |
| Calgary | June 28, 1884 | District created | — | — | James Davidson Geddes | Independent | New electoral district | Yes |
| Moose Mountain | June 28, 1884 | District created | — | — | John Gillanders Turriff | Independent | New electoral district | Yes |
| Broadview | August 31, 1883 | District created | — | — | John Claude Hamilton | Independent | New electoral district | No |
| Moose Jaw | August 13, 1883 | District created | — | — | James Hamilton Ross | Independent | New electoral district | Yes |
| Qu'Appelle | August 13, 1883 | District created | — | — | Thomas Wesley Jackson | Independent | New electoral district | Yes |
| Regina | August 13, 1883 | District created | — | — | William White | Independent | New electoral district | No |
| Lorne | June 5, 1883 | Lawrence Clarke | | Independent | Day Hort MacDowall | Independent | Retirement | No |
| Edmonton | May 29, 1883 | District created | — | — | Frank Oliver | Independent | New electoral district | No |
| Lorne | March 23, 1881 | District created | — | — | Lawrence Clarke | Independent | New electoral district | No |