Elections were held in the state of Western Australia on 15 March 1947 to elect all 50 members to the Legislative Assembly. The result was a hung parliament—the four-term Labor government, led by Premier Frank Wise, was defeated with a swing of approximately 7%, but the Liberal-Country Party coalition, led by the Liberal Party leader Ross McLarty, won exactly half of the seats, and needed the support of the Independent members Harry Shearn and William Read to obtain a majority in the Assembly.
The election was the Liberal Party's first major showing since its formation in 1944-1945 out of the former Nationalist Party. Coincidental with this, in 1944, was the significant change in the fortunes of the Country Party when the Primary Producers' Association, of which the Party had been the political wing, passed a motion during negotiations with the Wheatgrowers' Union deleting the rule which authorised the Party's existence and its use of PPA branches and funds for party purposes. A new organisation was hastily set up by the Opposition Leader Arthur Watts and the member for Pingelly, Harrie Seward, who were very active in setting up branches to endorse local candidates and obtaining donations on which to run the 1947 campaign. This was the start of a significant decline in the Country Party's fortunes over the ensuing decades.