| 20th |
William McMahon PC, CH (later Sir William) 23 Feb 1908 - 31 Mar 1988 |
 |
period in office term of office political party age first in office |
10 Mar 1971 - 5 Dec 1972 1 year, 8 months, 25 days Liberal 62 |
| 19th |
John Grey Gorton PC (later Sir John, PC, AC) 9 Sept 1911 - 19 May 2002 |
 |
period in office term of office political party age first in office |
10 Jan 1968 - 10 Mar 1971 3 years, 2 months Liberal 56 |
| 18th |
John McEwen PC (later Sir John) 2 Mar 1900 - 20 Nov 1980 |
 |
period in office term of office political party age first in office |
19 Dec 1967 - 10 Jan 1968 23 days Country 66 |
| 17th |
Harold Edward Holt PC, CH 5 Aug 1908 - 19 Dec 1967 |
 |
period in office term of office political party age first in office |
26 Jan 1966 - 19 Dec 1967 1 year, 10 months, 23 days Liberal 56 |
| * |
Robert Gordon Menzies PC, KC (later Sir Robert, PC, KT, CH, QC) 20 Dec 1894 - 15 May 1978 |
 |
period in office term of office political party age first in office |
19 Dec 1949 - 26 Jan 1966 16 years, 1 month, 8 days Liberal 55 |
| 16th |
Joseph Benedict Chifley PC 22 Sept 1885 - 13 June 1951 |
 |
period in office term of office political party age first in office |
13 July 1945 - 19 Dec 1949 4 years, 5 months, 7 days Australian Labor 59 |
| 15th |
Francis Michael Forde PC 18 July 1890 - 28 Jan 1983 |
 |
period in office term of office political party age first in office |
6th July - 13th July 1945 8 days Australian Labor 54 |