2008 Mayo by-election
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| Turnout | 80.10% 15.78 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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The 2008 Mayo by-election was held on 6 September 2008 to elect the member for Mayo in the Australian House of Representatives, following the retirement of Liberal Party MP and former Liberal leader Alexander Downer. The by-election was held on the same day as the Lyne by-election, and the Western Australian state election.
The writ for the by-election was issued 4 August, with the rolls closing on 8 August. Candidate nominations closed on 14 August. The by-election was contested on the same boundaries drawn for Mayo at the 2007 federal election. The seat was won by Jamie Briggs of the Liberal Party on a two-candidate preferred vote of 53 per cent against the Greens.