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_ |
|---|---|---|---|---|---|---|
| 23. | SA | Sir Richard Butler (1885–1966) KCMG | Liberal & Country League | 18 April 1933 | 5 November 1938 | 8 years, 210 days |
| 24. | VIC | John Cain II (1931– ) | Australian Labor Party | 8 April 1982 | 10 August 1990 | 8years, 124days |
| 25. | WA | Richard Court (1947– ) AC | Liberal Party of Australia | 16 February 1993 | 10 February 2001 | 7years, 360days |
| 26. | WA | Sir James Mitchell (1866–1951) GCMG | Nationalist Party of Australia | 17 May 1919 | 16 April 1924 | 7 years, 335 days |
| 26. | WA | Sir James Mitchell (1866–1951) GCMG | Nationalist Party of Australia | 24 April 1930 | 24 April 1933 | 7 years, 335 days |
| 27. | WA | Sir Charles Court (1911–2007) AK KCMG OBE | Liberal Party of Australia | 8 April 1974 | 25 January 1982 | 7years, 292days |