The Colonial Secretary of Van Diemen's Land (later Colonial Secretary of Tasmania) was the representative of the British Colonial Office in Van Diemen's Land (later Tasmania), and was usually appointed from Britain.In 1884, the role was renamed Chief Secretary.
The following is an incomplete list of colonial secretaries of Van Diemen's Land/Tasmania:
| Colonial Secretary | Period in office | |
|---|---|---|
| William H. Hamilton (acting) | 1825–1826 | |
| John Burnett | 1826 – 1834 | |
| John Montagu | 1834–1838 | |
| Matthew Forster (acting) | 1839–1840 | |
| John Montagu | 1840 – 2 February 1842 | |
| George Thomas Boyes (acting) | 2 February 1842 – 20 April 1843 | |
| James Ebenezer Bicheno | 20 April 1843 – 25 February 1851 | |
| Peter Fraser (acting) | 25 February 1851 – April 1852 | |
| Henry Samuel Chapman | April 1852 – November 1852 | |
| William Thomas Napier Champ | November 1852 – 31 October 1856 |
| Colonial Secretary | Period in office | |
|---|---|---|
| William Thomas Napier Champ | 1 November 1856 – 26 February 1857 | |
| Thomas George Gregson | 26 February 1857 – 25 April 1857 | |
| William Henty | 25 April 1857 – 1 November 1862 | |
| Frederick Maitland Innes | 1 November 1862 – 21 January 1863 | |
| James Whyte | 21 January 1863 – 24 November 1866 | |
| Richard Dry | 24 November 1866 – 2 August 1869 | |
| James Milne Wilson | 2 August 1869 – 4 November 1872 | |
| James Reid Scott | 4 November 1872 – 4 August 1873 | |
| Thomas Daniel Chapman | 4 August 1873 – 10 April 1876 | |
| George Gilmore | 10 April 1876 – 20 July 1876 | |
| Thomas Reibey | 20 July 1876 – 9 August 1877 | |
| William Moore | 11 August 1877 – 20 December 1878 | |
| Thomas Reibey | 20 December 1878 – 30 October 1879 | |
| William Moore | 30 October 1879 – August 1884 |