This is a list of members of the 18th Legislative Assembly of Queensland from 1909 to 1912, as elected at the 1909 state election held on 2 October 1909.
1 On 7 February 1911,
William Kidston, the
Premier of Queensland and Ministerial member for
Rockhampton, resigned to become President of the Land Court. Labor candidate
John Adamson won the resulting by-election on 25 February 1911.
2 On 7 February 1911,
Arthur Hawthorn, the Ministerial member for
Enoggera, resigned following his appointment to the Queensland Legislative Council. Ministerial candidate
Richard Trout won the resulting by-election on 25 February 1911.
3 On 10 March 1911,
Joshua Thomas Bell, the Ministerial member for
Dalby, died. At the resulting by-election on 2 April 1911, Ministerial candidate
William Vowles was elected.
4 In July 1911, the member for
Fitzroy,
James Crawford was expelled from the Labor Party for alleged disloyalty. He served out his term as an independent.
5 On 24 August 1911,
Denis Keogh, the Ministerial member for
Rosewood, died. Ministerial candidate Harry Stevens won the resulting by-election on 16 September 1911.
6 On 30 August 1911,
Richard John Cottell, the Ministerial member for
Toowong, died. The Secretary for Public Lands and member for
Brisbane North,
Edward Macartney, resigned on 5 September. By-elections for both seats were held on 16 September 1911, with Macartney switching to
Toowong, and Ministerial candidate
Thomas Welsby winning
Brisbane North.