League for Socialist Action
North American Labour Party
Ontario Humanist Party
Socialist Party of Ontario
Co-operative Commonwealth Federation (first election 1934) 1932–1961
(Independent) Labour 1874-1937
Labor-Progressive Party 1941-1959
Liberal-Labour 1943-1970s
Liberal-Progressive 1934-1940
Soldier 1919-1923
Patrons of Industry 1894
Protestant Protective Association 1894
United Farmers of Ontario 1918-1940
Clear Grits pre-Confederation
Reform Party pre-Confederation
Family Compact (pre-1837 ruling clique)
List of political parties in Ontario Wikipedia (Text) CC BY-SA