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. The party has been led by Bonnie Crombie since December 2023.

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 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 Liberals lost official party status in the 2018 Ontario provincial election; they had fallen to only seven seats, the worst defeat of a governing party in Ontario history. Prior to the 2018 election, the party had won every election since the beginning of the 21st 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. The party regained official party status in the 2025 Ontario general election under the leadership of Bonnie Crombie.