The Liberal Party of Ontario is a political party in the province of Ontario, Canada. Founded in 1857, it is one of the oldest political parties in the country. The party traditionally supports progressive policies, including social justice, environmental protection, and economic development. It aims to represent a broad range of interests and values within Ontario's diverse population. The party has been a significant player in Ontario's political landscape, having formed the provincial government multiple times. Its leadership has included notable figures such as Dalton McGuinty and Kathleen Wynne. The party's platform often emphasizes healthcare, education, and public services as key priorities for the province.