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.

Quick Facts All 50 seats in the Western Australian Legislative Assembly, First party ...

1917 Western Australian state election

← 1914 29 September 1917 (1917-09-29) 1921 →
All 50 seats in the Western Australian Legislative Assembly
First party Second party   Leader Henry Lefroy Philip Collier Party Nationalist/Country coalition Labor Leader since 28 June 1917 16 April 1917 Leader's seat Moore Boulder Seats won 34 seats 15 seats Seat change 2 1 Percentage 69.01% 24.79%
Premier before election Henry Lefroy Nationalist/Country coalition Elected Premier Henry Lefroy Nationalist/Country coalition

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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. The National Liberal grouping was not a party in its own right, but a faction within the Nationalist Party, so the Nationalist Party as a whole held 16 seats—unchanged from before the election—and attracted 34.85% of the vote.

Notes:

¹ A total of 167,311 people were enrolled to vote at the election, but 10 of the 50 seats, representing 29,196 voters, were not contested by more than one candidate. Six of these were Labor seats, two were Country Party, one was Nationalist and one was National Labor.

• Members of the Western Australian Legislative Assembly, 1914–1917
• Members of the Western Australian Legislative Assembly, 1917–1921