List of Australian heads of government by time in office Historical premiers Historical premiers

| Rank_ | State_ | Premier_ | Party_ | Assumed_office_ | Left_office_ | TOTAL_Time_in_office_ |
|---|---|---|---|---|---|---|
| 17. | SA | Don Dunstan (1926–1999) AC , QC | Australian Labor Party | 1 June 1967 | 17 April 1968 | 9 years, 214 days |
| 17. | SA | Don Dunstan (1926–1999) AC , QC | Australian Labor Party | 2 June 1970 | 15 February 1979 | 9 years, 214 days |
| 18. | WA | Philip Collier (1873–1948) | Australian Labor Party | 17 April 1924 | 23 April 1930 | 9 Years, 123 days |
| 18. | WA | Philip Collier (1873–1948) | Australian Labor Party | 24 April 1933 | 19 August 1936 | 9 Years, 123 days |
| 19. | VIC | Sir James McCulloch (1819–1893) KCMG | No Party Alignment | 27 June 1863 | 6 May 1868 | 9 years, 118 days |
| 19. | VIC | Sir James McCulloch (1819–1893) KCMG | No Party Alignment | 11 July 1868 | 20 September 1869 | 9 years, 118 days |