List of Ontario by-elections
The list of Ontario by-elections includes every by-election held in the Canadian province of Ontario. 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 parliament.
Causes
A by-election occurs whenever there is a vacancy in the Ontario legislature. Vacancies can occur for the following reasons:
- Death of a member.
- Resignation of a member.
- Voided results
- Expulsion from the legislature.
- Ineligibility to sit.
When there is a vacancy, a by-election must be called within six months. Under amendments to the Election Act approved in 2016, a by-election is no longer required when a vacancy occurs in the 12 months leading up to a fixed general election date.
Ministerial by-elections
The list includes ministerial by-elections which occurred due to the requirement that incumbent members recontest their seats upon being appointed to Cabinet. These by-elections were almost always uncontested. This requirement was amended in 1926 to exempt ministers appointed within three months after a general election. In 1941 it was abolished
completely.
36th Legislative Assembly of Ontario 1995–1999
30th Legislative Assembly of Ontario 1975–1977
''no by-elections''
25th Legislative Assembly of Ontario 1955–1959
† Won by acclamation
21st Legislative Assembly of Ontario 1943–1945
20th Legislative Assembly of Ontario 1937–1943
† Won by acclamation
*Though nominally an "Independent-Liberal", MacBride was a supporter of the Liberal government and was a cabinet minister at the time of his death
† Won by acclamation
† Won by acclamation
† Won by acclamation
16th Legislative Assembly of Ontario 1923–1926
† Won by acclamation
15th Legislative Assembly of Ontario 1919–1923
† Won by acclamation
† Won by acclamation
† Won by acclamation
† Won by acclamation
† Won by acclamation
† Won by acclamation
† Won by acclamation
7th Legislative Assembly of Ontario 1890–1894
† Won by acclamation
† Won by acclamation
† Won by acclamation
† Won by acclamation
*McAllister was a supporter of Mowat's government
3rd Legislative Assembly of Ontario 1875–1879
† Won by acclamation
† Won by acclamation