Note: Before 1919, the leaders of the Ontario Liberal Party were chosen by its elected Members of the Legislative Assembly.
Frederick Forsyth Pardee, Member of Parliament for Lambton West was to be nominated but sent a message to the convention declining.
The move was to be affirmed by a party convention to be held on May 1, but this was cancelled due to the 1945 provincial election being underway.
[6][7][8] Hepburn was defeated in the 1945 provincial election, and Farquhar Oliver was chosen as the Ontario Liberal Party's parliamentary leader on July 4, 1945.
(Held on May 16, 1947 at the King Edward Hotel in Toronto)[9][10] (Note: Complete vote totals were not reported.
Oliver received 492 of 661 votes cast)[10] (Held on November 10, 1950 at the Royal York Hotel in Toronto.
(Held on January 6, 1967 at the Royal York Hotel, Toronto)[15] (Nixon was elected interim leader by the caucus on November 16, 1966 following the resignation of Andrew Thompson.
[18] (Results announced December 2, 2023 at the Metro Toronto Convention Centre) A leadership election was held December 2, 2023 due to the June 2, 2022 resignation of Steven Del Duca as party leader following his party's poor result in the 2022 Ontario general election.