Francis Leo "Frank" "Pop" Gainer (February 12, 1888 – March 10, 1975) was a politician from Alberta, Canada.
He served in the Legislative Assembly of Alberta from 1955 to 1967 as a member of a coalition of the Progressive Conservative and Liberal parties.
[2] In the 1959 general election he defeated Social Credit candidate Robin Echlin in a straight fight by just 71 votes.
[3] Due to Gainer's Coalition label, it was thought that he would be chosen leader of the official opposition after the 1959 election.
In the 1963 general election he was returned to office with a slightly smaller share of the vote than in 1959 over two other candidates.