1 Following the 1947 state election a new Cabinet consisting of eight members, including one Member of the Legislative Council, was appointed to the McLarty Ministry. These members were therefore required to resign and contest ministerial by-elections on 17 April 1947, at which all were returned unopposed. Due to changes in the law during the term of Parliament, these were the last ministerial by-elections to be held in Western Australia.
2 At the 1947 election, the Labor member for Electoral district of Pilbara, Bill Hegney, and his Independent rival, Leonard Taplin, each secured 234 votes, and Hegney was pronounced the winner on the casting vote of the returning officer. A petition was lodged against Hegney's return, and a fresh election was called for 2 August 1947, which Hegney won against the same opponent with a 31-vote majority.
7 In March 1949, James Mann, the member for Beverley, led a breakaway faction out of the Country Party, and initially sat as an Independent. His faction merged with the Liberal Party in May 1949, and the party became known as the Liberal and Country League.