The 1994 Helena state by-election was a by-election for the seat of Helena in the Legislative Assembly of Western Australia held on 10 September 1994. It was triggered by the resignation of Gordon Hill (the sitting Labor member) on 4 August 1994. The election was won by the Liberal Party, with their candidate, Rhonda Parker, recording 52.1 percent of the two-party-preferred vote. Parker became the first woman from the Liberal Party to win a by-election in Western Australia, and the fifth overall. Richard Court's government became the first sitting government to increase its majority at a by-election since 1943, when John Willcock's Labor government won East Perth from an independent.