The Commonwealth Electoral Act 1918 (the Electoral Act) requires that a redistribution process should be undertaken when:

  • the number of members of the House of Representatives to which a state or territory is entitled has changed,
  • the number of electors in more than one-third of the electoral divisions in a state (or one of the electoral divisions in the Australian Capital Territory or the Northern Territory) deviates from the average divisional enrolment by over ten per cent for a period of more than two months, or
  • a period of seven years has elapsed since the last redistribution process was determined.

Indicative timing

Unless a redistribution is required to start earlier or is deferred, the next redistribution will be due to commence within 30 days after seven years have elapsed since the most recent redistribution was determined.

Indicative timing
State/territory Most recent determination of a redistribution was on … A redistribution would be required to commence within 30 days of …
Northern Territory 7 February 2017 A redistribution commenced on 22 February 2024
Tasmania 14 November 2017 The redistribution has been deferred and will commence within 30 days of the first meeting day of the House of Representatives in the 48th Parliament.
Queensland 27 March 2018 27 March 2025
Australian Capital Territory 13 July 2018 13 July 2025
South Australia 20 July 2018 20 July 2025
Western Australia 24 September 2024 24 September 2031
New South Wales 10 October 2024 10 October 2031
Victoria 17 October 2024 17 October 2031
Updated: 15 November 2024