The 1963 Ontario general election was held on September 25, 1963, to elect the 108 members of the 27th Legislative Assembly of Ontario (Members of Provincial Parliament, or "MPPs") of the Province of Ontario. The Ontario Progressive Conservative Party, led by John Robarts, who had replaced Leslie Frost as PC leader and premier in 1961, won a seventh consecutive term in office, and maintained its majority in the legislature, increasing its caucus from the 71 members elected in the previous election to 77 members in an enlarged legislature.