List of Queensland state by-elections
The following is a list of state by-elections for the Queensland Legislative Assembly held in the Australian state of Queensland.
1990–1999
1950–1959
1910–1919
1880–1889
| Parl. | Electorate | By-election | Previous member | Elected member | Vacated | Cause | Retained |
| 8th | South Brisbane | 6 April 1880 | 24 March 1880 | retired, ill health | |||
| 8th | Leichhardt | 6 May 1880 | 10 April 1880 | died | |||
| 8th | Bowen | 29 June 1880 | 4 June 1880 | re-contest as minister | Yes | ||
| 8th | Bundamba | 12 November 1880 | 26 October 1880 | resigned insolvent | |||
| 8th | Maryborough | 13 December 1880 | 24 November 1880 | resigned | |||
| 8th | Drayton and Toowoomba | 14 January 1881 | 1 January 1881 | died | |||
| 8th | Bowen | 24 January 1881 | 25 December 1880 | died | |||
| 8th | Mitchell | 3 February 1881 | 30 December 1880 | moved to Council | |||
| 8th | Mackay | 24 March 1881 | 3 January 1881 | died | |||
| 8th | Ipswich | 8 August 1881 | 27 July 1881 | resigned | |||
| 8th | Rockhampton | 8 October 1881 | 21 September 1881 | died | |||
| 8th | Darling Downs | 29 November 1881 | 1 November 1881 | resigned | |||
| 8th | North Brisbane | 13 January 1882 | 24 December 1881 | moved to Council | |||
| 8th | Dalby | 31 January 1882 | 20 January 1882 | resigned | |||
| 8th | Gregory | 21 March 1882 | 20 February 1882 | resigned | |||
| 8th | Mitchell | 27 April 1882 | 5 April 1882 | resigned | |||
| 8th | Bulimba | 13 July 1882 | 4 July 1882 | resigned | |||
| 8th | Rosewood | 17 July 1882 | 4 July 1882 | resigned | |||
| 8th | Bowen | 18 January 1883 | 5 January 1883 | resigned | |||
| 9th | Leichhardt | 7 December 1883 | 13 November 1883 | re-contest as minister | Yes | ||
| 9th | Moreton | 21 November 1883 | 13 November 1883 | moved to Council | |||
| 9th | Cook | 4 March 1884 | 4 March 1884 | disqualified | |||
| 9th | Maryborough | 25 July 1884 | 8 July 1884 | resigned insolvent | |||
| 9th | Moreton | 13 May 1885 | 22 April 1885 | moved to Council | |||
| 9th | Cook | 16 September 1885 | 4 August 1885 | resigned insolvent | |||
| 9th | Enoggera | 26 October 1885 | 13 October 1885 | resigned, ill health | |||
| 9th | Fortitude Valley | 14 September 1885 | additional member | ||||
| 9th | Townsville | 11 November 1885 | additional member | ||||
| 9th | Barcoo | 24 November 1885 | new electorate | ||||
| 9th | Musgrave | 5 January 1886 | new electorate | ||||
| 9th | Blackall | 13 April 1886 | 23 January 1886 | resigned | |||
| 9th | Fortitude Valley | 1 May 1886 | 16 April 1886 | died | |||
| 9th | Mulgrave | 10 July 1886 | 5 June 1886 | resigned | |||
| 9th | Warwick | 18 July 1887 | 2 July 1887 | resigned | |||
| 9th | Fassifern | 4 August 1887 | 19 July 1887 | resigned | |||
| 9th | Fassifern | 4 August 1887 | 19 July 1887 | resigned | |||
| 9th | Darling Downs | 6 September 1887 | 22 August 1887 | died | |||
| 10th | Fitzroy | 3 August 1889 | 17 July 1889 | resigned |