Sir William Ralph Meredith, was a Canadian lawyer, politician and judge. He served as Leader of the Ontario Conservatives from 1878 to 1894, Chancellor of the University of Toronto from 1900 until his death, and Chief Justice of Ontario from 1913 until his death. Through his principles, known as the "Meredith Principles", he is regarded as the founding father of the Workers' Compensation System in Ontario, the impact of which was felt throughout Canada and the United States.

The Progressive Conservative Party of Ontario, often shortened to the Ontario PC Party or simply the PCs, colloquially known as the Tories, is a centre to centre-right political party in Ontario, Canada.