The Progressive Conservative Party of Ontario is a political party in Ontario, Canada. It governed the province from 1943 to 1985 and from 1995 to 2003, and currently forms the Official Opposition in the Legislative Assembly of Ontario.

The party also governed the province under its previous name, the Conservative Party of Ontario, from 1867 to 1871, 1905 to 1919, and 1923 to 1934.

The party ran a full slate of 103 candidates in the 2003 provincial election. Of these, 24 were elected. Several PC candidates have individual biography pages; information about others may be found here.