Landeryou would continue in office winning re-election in the 1955 Alberta general election he defeated 3 other candidates in a close race to win his 4th term in office. He would win his 5th term with the largest plurality of his electoral career and win the largest majority in the history of the province to that point, in the 1959 Alberta general election defeating 2 other candidates. He would easily win his 6th term in office in the 1967 Alberta general election with a slightly reduced margin of victory but still remaining popular.