[1] 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.

He resigned as party leader but the Liberals continued in their role of official opposition.

Robert Gibson of Kenora was re-elected as a Liberal-Labour MPP sitting with the Liberal caucus.

The newly conglomerated party was still led by Donald C. MacDonald, and won two additional seats, for a total of seven.

The official Social Credit party ran candidates in three rural ridings while the more radical Social Credit Action faction ran candidates in six ridings in Toronto.