List of political parties in Ontario

The following is a list of political parties in Ontario, Canada.

Other parties registered with Elections Ontario
Parties listed in the order they are alphabetized by Elections Ontario.

Unregistered parties

 * League for Socialist Action
 * North American Labour Party
 * Ontario Humanist Party
 * Socialist Party of Ontario

Historical parties that held seats in the Legislative Assembly

 * 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
 * Trillium Party of Ontario 2017 - 2018
 * Patrons of Industry 1894
 * Protestant Protective Association 1894
 * United Farmers of Ontario 1918 - 1940

Pre-Confederation parties

 * Clear Grits (pre-Confederation)
 * Reform Party (pre-Confederation)
 * Family Compact (pre-1837 ruling clique)