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.

8th Northwest Territories Legislative Assembly 1975–1979
† Won by acclamation; this date is the date of the return of the writ.

5th Northwest Territories Legislative Council 1964–1967
† Won by acclamation; this date is the date of the return of the writ.

3rd Northwest Territories Legislative Council 1957–1960
† Won by acclamation; this date is the date of the return of the writ.

5th North-West Legislative Assembly 1902–1905
† Won by acclamation; this date is the date of the return of the writ.

4th North-West Legislative Assembly 1898–1902
† Won by acclamation; this date is the date of the return of the writ.

3rd North-West Legislative Assembly 1894–1898
† Won by acclamation; this date is the date of the return of the writ.