The 1959 Ontario general election was held on June 11, 1959, to elect the 98 members of the 26th Legislative Assembly of Ontario of the Province of Ontario.

Leslie Miscampbell Frost was a politician in Ontario, Canada, who served as the province's 16th premier from May 4, 1949, to November 8, 1961. Due to his lengthy tenure, he gained the nickname "Old Man Ontario"; he was also known as "the Silver Fox".