This is a list of members of the Western Australian Legislative Council from 22 May 1916 to 21 May 1918. The chamber had 30 seats made up of ten provinces each electing three members, on a system of rotation whereby one-third of the members would retire at each biennial election.
In March 1917, the Labor Party split over the matter of military conscription, with a number of Labor members of Parliament either resigning from the Party or being expelled. By May 1917, they had formed a new National Labor Party with a base in the Goldfields region, historically the heart of the Labor vote in Western Australia. In June 1917, they formed a coalition with the new Nationalist Party (which replaced the former Liberal Party) and the Country Party to form a governing coalition in the Legislative Assembly. With these arrangements, another Ministry was formed under new Premier Henry Lefroy.