Australian Prime Ministers 1945 - 1975 By Luthien Mirrigon Period: Jan 1, 1945 to Jul 5, 1945 John Curtin - Labor Period: Jul 6, 1945 to Jul 13, 1945 Francis Ford - Labor Period: Jul 13, 1945 to Dec 19, 1949 Ben Chifley - Labor Period: Dec 19, 1949 to Jan 26, 1966 Robert Menzies - Liberal Period: Jan 26, 1966 to Dec 17, 1967 Harold Holt - Liberal Period: Dec 17, 1967 to Jan 10, 1968 John McEwan - Country Party Period: Jan 10, 1968 to Mar 10, 1971 John Gorton - Liberal Period: Mar 10, 1971 to Dec 5, 1972 William McMahon - Liberal Period: Dec 5, 1972 to Nov 11, 1975 Gough Whitlam - Labor