3 On 10 March 1911, Joshua Thomas Bell, the Liberal member for Dalby, died. At the resulting by-election on 2 April 1911, Liberal 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 Liberal member for Rosewood, died. Liberal candidate Harry Stevens won the resulting by-election on 16 September 1911.
6 On 30 August 1911, Richard John Cottell, the Liberal 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 Liberal candidate Thomas Welsby winning Brisbane North.