List of political parties in Ontario

Parties represented in the Legislative Assembly

• Ontario Liberal Party
• Ontario New Democratic Party
• Progressive Conservative Party of Ontario

Other registered parties

• Communist Party of Ontario
• Confederations of Regions Party (founded 1990)
• Family Coalition Party of Ontario (founded 1986)
• Freedom Party of Ontario (founded 1984)
• Green Party of Ontario (founded 1983)
• Ontario Libertarian Party (founded 1975)

Unregistered parties

• Ontario Humanist Party
• Representative Party of Ontario

Historical parties

• Clear Grits pre-Confederation
• Labour Progressive Party 1941-1959
• Liberal-Labour 1943-1970s
• Liberal-Progressive 1934-1940
• Natural Law Party of Ontario
• Northern Ontario Heritage Party 1977-1981
• Reform Party pre-Confederation
• Reform Party of Ontario 1999
• Social Credit Party of Ontario
• United Farmers of Ontario 1918-1940
• Unparty 1980-1983

Municipal parties

• Metro New Democratic Party 1970s- early 1990s
• Civic Liberals 1969