Henry Lefroy Nationalist/Country coalition Henry Lefroy Nationalist/Country coalition Elections were held in the state of Western Australia on 29 September 1917 to elect 50 members to the Western Australian Legislative Assembly.

The Nationalist-Country-National Labor coalition, led by Premier Sir Henry Lefroy, retained government against the Labor Party led by Opposition Leader Philip Collier.

The election followed a series of major changes in the Western Australian political landscape.

As the political changes were of a nature which make direct comparison meaningless, no vote swings have been included, and seat swings indicated are those caused by the election itself, rather than a comparison with the previous election.

1917 Western Australian state electionLegislative Assembly Notes: