State elections were held in Australia on 27 March 1915. All 46 seats in the South Australian House of Assembly were up for election. The incumbent Liberal Union government led by Premier of South Australia Archibald Peake was defeated by the opposition United Labor Party led by Leader of the Opposition Crawford Vaughan. Each district elected multiple members, with voters casting multiple votes.A redistribution in 1913 was forced by the enlargement of the House of Assembly to 46 members.
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