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Ontario Liberal Party
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Ontario Liberal Party
The Ontario Liberal Party (OLP; French: Parti libéral de l'Ontario, PLO) is a political party in the province of Ontario, Canada. It has been one of the two main contenders for government for much of Ontario's history along with the their conservative rival (currently the Progressive Conservative Party). Liberal ministries governed the province 63 of the approximately 160 years since Confederation, producing 10 of its 26 premiers.
The party has strong informal ties to the Liberal Party of Canada, but the two parties are organizationally independent and have separate, though overlapping, memberships. The provincial party and the Ontario wing of the federal party were organizationally one entity until members voted to split in 1976.
The party espouses the principles of liberalism, with their rival the Progressive Conservative Party positioned to the right and the New Democratic Party (who at times aligned itself with the Liberals during minority governments), positioned to their left.
The Liberals suffered its worst electoral defeat in the 2018 Ontario provincial election both in terms of seat count (seven) and popular vote (19.6%), losing official party status at the Legislative Assembly of Ontario. It was also the worst defeat of a governing party in Ontario history. Prior to the 2018 election, the party had won four consecutive elections since the turn of the century and had governed the province for the previous 15 years. In the 2022 provincial election, the Liberals saw a modest increase in support, finishing second in popular vote, but only winning eight seats.
In the most recent 2025 election, the party led by current leader Bonnie Crombie won 14 seats and regained official party status. It however remained the third-party in the legislature despite having won a substantially larger share of the populate vote than the official opposition NDP (30% vs NDP's 18.6%).
Following Ontario's first ministry post Confederation (a predominately Conservative ministry led by a Liberal being opposed by the majority of the Liberals in the first legislative assembly), the Ontario Liberals went through an extended period of dominance, governing the province for 34 of the 50 years between Confederation and World War I. Sir Oliver Mowat,one of the Fathers of Confederation, led the party and the province for 24 of those years, and remains the province's longest-serving premier (and the third longest of any first minister in Canada).
It however spent much of the following century in the wilderness. Bitter internal division ended a nine-year Liberal government in 1943 and produced the province's shortest-serving premier to date in Harry Nixon. Follow four decades in opposition, David Peterson with the support of the NDP ended 42 consecutive years of Progressive Conservative rules in 1985, and led the province for five years. After the turn of the millennium, Dalton McGuinty led the party back to government in 2003. Kathleen Wynne, a minister in the McGuinty ministry, won the party's leadership in 2013, becoming the first woman to serve as Premier of Ontario, and the first openly gay person to serve as first minister anywhere in Canada. She led the party to its most recent victory in 2014, before leading it to its historic defeat in 2018.
The Liberal Party of Ontario is descended from the Reform Party of Robert Baldwin and William Lyon Mackenzie, who argued for responsible government in the 1830s and 1840s against the conservative patrician rule of the Family Compact.
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Ontario Liberal Party
The Ontario Liberal Party (OLP; French: Parti libéral de l'Ontario, PLO) is a political party in the province of Ontario, Canada. It has been one of the two main contenders for government for much of Ontario's history along with the their conservative rival (currently the Progressive Conservative Party). Liberal ministries governed the province 63 of the approximately 160 years since Confederation, producing 10 of its 26 premiers.
The party has strong informal ties to the Liberal Party of Canada, but the two parties are organizationally independent and have separate, though overlapping, memberships. The provincial party and the Ontario wing of the federal party were organizationally one entity until members voted to split in 1976.
The party espouses the principles of liberalism, with their rival the Progressive Conservative Party positioned to the right and the New Democratic Party (who at times aligned itself with the Liberals during minority governments), positioned to their left.
The Liberals suffered its worst electoral defeat in the 2018 Ontario provincial election both in terms of seat count (seven) and popular vote (19.6%), losing official party status at the Legislative Assembly of Ontario. It was also the worst defeat of a governing party in Ontario history. Prior to the 2018 election, the party had won four consecutive elections since the turn of the century and had governed the province for the previous 15 years. In the 2022 provincial election, the Liberals saw a modest increase in support, finishing second in popular vote, but only winning eight seats.
In the most recent 2025 election, the party led by current leader Bonnie Crombie won 14 seats and regained official party status. It however remained the third-party in the legislature despite having won a substantially larger share of the populate vote than the official opposition NDP (30% vs NDP's 18.6%).
Following Ontario's first ministry post Confederation (a predominately Conservative ministry led by a Liberal being opposed by the majority of the Liberals in the first legislative assembly), the Ontario Liberals went through an extended period of dominance, governing the province for 34 of the 50 years between Confederation and World War I. Sir Oliver Mowat,one of the Fathers of Confederation, led the party and the province for 24 of those years, and remains the province's longest-serving premier (and the third longest of any first minister in Canada).
It however spent much of the following century in the wilderness. Bitter internal division ended a nine-year Liberal government in 1943 and produced the province's shortest-serving premier to date in Harry Nixon. Follow four decades in opposition, David Peterson with the support of the NDP ended 42 consecutive years of Progressive Conservative rules in 1985, and led the province for five years. After the turn of the millennium, Dalton McGuinty led the party back to government in 2003. Kathleen Wynne, a minister in the McGuinty ministry, won the party's leadership in 2013, becoming the first woman to serve as Premier of Ontario, and the first openly gay person to serve as first minister anywhere in Canada. She led the party to its most recent victory in 2014, before leading it to its historic defeat in 2018.
The Liberal Party of Ontario is descended from the Reform Party of Robert Baldwin and William Lyon Mackenzie, who argued for responsible government in the 1830s and 1840s against the conservative patrician rule of the Family Compact.