This is a list of premiers of Western Australia by time in office. The basis of the list is the inclusive number of days between dates.
Rank by time in office
| Rank | No. | Officeholder | Portrait | Party | District | Assumed office | Left office | Time in office (term) | Time in office (total) | Election wins | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | 19th | Sir David Brand (1912–1979) | Liberal | MLA for Greenough (1945–1975) | 2 April 1959 | 3 March 1971 | 11 years, 335 days | 1959 1962 1965 1968 | |||
| 2. | 1st | Sir John Forrest (1847–1918) | Pro-Forrest | MLA for Bunbury (1890–1901) | 29 December 1890 | 15 February 1901 | 10 years, 48 days | 1890 1894 1897 | |||
| 3. | 14th | Philip Collier (1873–1948) | Labor | MLA for Boulder (1905–1948) | 16 April 1924 | 24 April 1930 | 6 years, 8 days | 9 years, 126 days | 1924 1927 1933 1936 | ||
| 24 April 1933 | 20 August 1936 | 3 years, 118 days | |||||||||
| 4. | 15th | John Willcock (1879–1956) | Labor | MLA for Geraldton (1917–1947) | 20 August 1936 | 31 July 1945 | 8 years, 345 days | 1939 1943 | |||
| 5. | 29th | Colin Barnett (1950– ) | Liberal | MLA for Cottesloe (1990–2018) | 23 September 2008 | 17 March 2017 | 8 years, 175 days | 2008 2013 | |||
| 6. | 26th | Richard Court (1947– ) | Liberal | MLA for Nedlands (1982–2001) | 16 February 1993 | 10 February 2001 | 7 years, 360 days | 1993 1996 | |||
| 7. | 13th | Sir James Mitchell (1866–1951) | Nationalist | MLA for Northam (1905–1933) | 17 May 1919 | 16 April 1924 | 4 years, 335 days | 7 years, 335 days | 1921 1930 | ||
| 24 April 1930 | 24 April 1933 | 3 years, 0 days | |||||||||
| 8. | 21st | Sir Charles Court (1911–2007) | Liberal | MLA for Nedlands (1953–1982) | 8 April 1974 | 25 January 1982 | 7 years, 292 days | 1974 1977 1980 | |||
| 9. | 30th | Mark McGowan (1967– ) | Labor | MLA for Rockingham (1996–2023) | 17 March 2017 | 8 June 2023 | 6 years, 83 days | 2017 2021 | |||
| 10. | 18th | Albert Hawke (1900–1986) | Labor | MLA for Northam (1933–1968) | 23 February 1953 | 2 April 1959 | 6 years, 37 days | 1953 1956 | |||
| 11. | 17th | Sir Ross McLarty (1891–1962) | Liberal | MLA for Murray-Wellington (1930–1950) Murray (1950–1962) | 1 April 1947 | 23 February 1953 | 5 years, 328 days | 1947 1950 | |||
| 12. | 23rd | Brian Burke (1947– ) | Labor | MLA for Balga (1983–1988) | 25 February 1983 | 25 February 1988 | 5 years, 0 days | 1983 1986 | |||
| 13. | 27th | Dr Geoff Gallop (1951– ) | Labor | MLA for Victoria Park (1986–2006) | 16 February 2001 | 25 January 2006 | 4 years, 343 days | 2001 2005 | |||
| 14. | 10th | John Scaddan (1876–1934) | Labor | MLA for Brown Hill-Ivanhoe (1911–1916) | 7 October 1911 | 27 July 1916 | 4 years, 294 days | 1911 1914 | |||
| 15. | 8th | Sir Newton Moore (1870–1936) | Ministerial | MLA for Bunbury (1904–1911) | 7 May 1906 | 16 September 1910 | 4 years, 132 days | 1908 | |||
| 16. | 20th | John Tonkin (1902–1995) | Labor | MLA for Melville (1950–1977) | 3 March 1971 | 8 April 1974 | 3 years, 66 days | 1971 | |||
| 17. | 25th | Dr Carmen Lawrence (1948– ) | Labor | MLA for Glendalough (1989–1994) | 12 February 1990 | 16 February 1993 | 3 years, 4 days | ||||
| 18. | 28th | Alan Carpenter (1957– ) | Labor | MLA for Willagee (1996–2009) | 25 January 2006 | 23 September 2008 | 2 years, 242 days | ||||
| 19. | 31st | Roger Cook (1965– ) | Labor | MLA for Kwinana (2008–) | 8 June 2023 | Incumbent | 2 years, 192 days | 2025 | |||
| 20. | 5th | Sir Walter James (1863–1943) | Opposition | MLA for East Perth (1894–1904) | 1 July 1902 | 10 August 1904 | 2 years, 40 days | ||||
| 21. | 9th | Frank Wilson (1866–1951) | Nationalist | MLA for Sussex (1904–1917) | 16 September 1910 | 7 October 1911 | 1 year, 21 days | 1 year, 357 days | |||
| Liberal (WA) | 27 July 1916 | 28 June 1917 | 336 days | ||||||||
| 22. | 24th | Peter Dowding (1943– ) | Labor | MLA for Maylands (1986–1990) | 25 February 1988 | 12 February 1990 | 1 year, 352 days | 1989 | |||
| 23. | 11th | Sir Henry Lefroy (1854–1930) | Nationalist | MLA for Moore (1911–1921) | 28 June 1917 | 17 April 1919 | 1 year, 293 days | 1917 | |||
| 24. | 16th | Frank Wise (1897–1986) | Labor | MLA for Gascoyne (1933–1951) | 31 July 1945 | 1 April 1947 | 1 year, 244 days | ||||
| 25. | 22nd | Ray O'Connor (1926–2013) | Liberal | MLA for Mount Lawley (1962–1984) | 25 January 1982 | 25 February 1983 | 1 year, 31 days | ||||
| 26. | 6th | Henry Daglish (1866–1920) | Labor | MLA for Subiaco (1901–1911) | 10 August 1904 | 25 August 1905 | 1 year, 15 days | ||||
| 27. | 3rd | George Leake (1856–1902) | Opposition | MLA for West Perth (1901–1902) | 27 May 1901 | 21 November 1901 | 178 days | 1 year, 3 days | 1901 | ||
| 23 December 1901 | 1 July 1902 | 190 days | |||||||||
| 28. | 7th | Sir Cornthwaite Rason (1858–1927) | Ministerial | MLA for Guildford (1901–1906) | 25 August 1905 | 7 May 1906 | 255 days | 1905 | |||
| 29. | 2nd | George Throssell (1840–1910) | Pro-Forrest | MLA for Northam (1890–1904) | 15 February 1901 | 27 May 1901 | 101 days | ||||
| 30. | 4th | Alf Morgans (1850–1933) | Ministerial | MLA for Coolgardie (1897–1904) | 21 November 1901 | 23 December 1901 | 32 days | ||||
| 31. | 12th | Sir Hal Colebatch (1872–1953) | Nationalist | Member of the Legislative Council (1912–1923) | 17 April 1919 | 17 May 1919 | 30 days |
- Roger Cook's time in office as of 17 December 2025
See also
- Premier of Western Australia
- List of prime ministers of Australia by time in office
- List of Australian heads of government by time in office
- List of premiers of New South Wales by time in office
- List of premiers of Queensland by time in office
- List of premiers of Tasmania by time in office
- List of premiers of South Australia by time in office
- List of premiers of Victoria by time in office
- List of chief ministers of the Northern Territory by time in office
- List of chief ministers of the Australian Capital Territory by time in office
wikipedia, wiki, encyclopedia, book, library, article, read, free download, Information about List of premiers of Western Australia by time in office, What is List of premiers of Western Australia by time in office? What does List of premiers of Western Australia by time in office mean?