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Before the 1890s there was no formal party system in Tasmania. Party labels before that time indicate a general tendency only.
See Premiers of the Australian states for a description and history of the office of Premier.
| Premier | Party | Took office |
|---|---|---|
| William Champ | - | 1 November 1856 |
| Thomas Gregson | - | 26 February 1857 |
| William Weston | - | 25 April 1857 |
| Francis Smith | - | 12 May 1857 |
| William Weston | - | 1 November 1860 |
| Thomas Chapman | - | 2 August 1861 |
| James Whyte | - | 20 January 1863 |
| Sir Richard Dry | - | 24 November 1866 |
| James Wilson | - | 4 August 1869 |
| Frederick Innes | - | 4 November 1872 |
| Alfred Kennerley | - | 4 August 1873 |
| Thomas Reibey | - | 20 July 1876 |
| Philip Fysh | - | 9 August 1877 |
| William Giblin | - | 5 March 1878 |
| William Crowther | - | 20 December 1878 |
| William Giblin | - | 30 October 1879 |
| Adye Douglas | - | 15 August 1884 |
| James Agnew | - | 8 March 1886 |
| Philip Fysh | Liberal | 29 March 1887 |
| Henry Dobson | Conservative | 17 August 1892 |
| Sir Edward Braddon | Liberal / Free Trade | 14 April 1894 |
| Neil Lewis | Conservative | 12 October 1899 |
| William Propsting | Liberal | 9 April 1903 |
| Sir Neil Lewis | Liberal | 19 June 1909 |
| John Earle | Labor | 20 October 1909 |
| Sir Neil Lewis | Liberal | 27 October 1909 |
| Albert Solomon | Liberal | 14 June 1912 |
| John Earle | Labor | 6 April 1914 |
| Walter Lee | Liberal, Nationalist | 15 April 1916 |
| John Hayes | Nationalist | 12 August 1922 |
| Sir Walter Lee | Nationalist | 14 August 1923 |
| Joseph Lyons | Labor | 25 October 1923 |
| John McPhee | Nationalist | 15 June 1928 |
| Sir Walter Lee | Nationalist | 15 March 1934 |
| Albert Ogilvie | Labor | 22 June 1934 |
| Edmund Dwyer-Gray | Labor | 11 June 1939 |
| Robert Cosgrove | Labor | 18 December 1939 |
| Edward Brooker | Labor | 18 December 1947 |
| Robert Cosgrove | Labor | 25 December 1948 |
| Eric Reece | Labor | 26 August 1958 |
| Angus Bethune | Liberal | 26 May 1969 |
| Eric Reece | Labor | 3 May 1972 |
| Bill Neilson | Labor | 31 March 1975 |
| Doug Lowe | Labor | 1 December 1977 |
| Harry Holgate | Labor | 11 November 1981 |
| Robin Gray | Liberal | 26 May 1982 |
| Michael Field | Labor | 29 June 1989 |
| Ray Groom | Liberal | 17 February 1992 |
| Tony Rundle | Liberal | 18 March 1996 |
| Jim Bacon | Labor | 14 September 1998 |