A by-election is held whenever a vacancy occurs in the House of Representatives. A supplementary election must be held if a candidate for a House of Representatives election dies in the period between close of nominations and polling day.
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2008 By-elections

• Lyne (NSW) 6 September 2008
• Mayo (SA) 6 September 2008
• Gippsland (VIC) 28 June 2008

General Information

• Issuing of Writs for Commonwealth By-elections

Previous By-elections & Supplementary Elections

• Werriwa (NSW) 19 March 2005
• Cunningham (NSW) 19 October 2002
• Aston (VIC) 14 July 2001
• Ryan (QLD) 17 March 2001
• Isaacs (VIC) 12 August 2000
• Holt (VIC) 6 November 1999
• Newcastle (NSW) Supplementary Election 21 November 1998
• Fraser (ACT) 1 February 1997
• Lindsay (NSW) 19 October 1996
• Blaxland (NSW) 15 June 1996
• Wentworth (NSW) 8 April 1995
• Canberra (ACT) 25 March 1995
• Kooyong (VIC) 19 November 1994
• Warringah (NSW) 26 March 1994
• Mackellar (NSW) 26 March 1994
• Bonython (SA) 19 March 1994
• Fremantle (WA) 12 March 1994
• Werriwa (NSW) 29 January 1994