Parliament of Australia

Parliament of the Commonwealth
48th Parliament of Australia
Type
Type
HousesSenate
House of Representatives
History
Founded
  • First session: 9 May 1901 (1901-05-09)[1]
Leadership
Sam Mostyn
since 1 July 2024
President of the Senate
Sue Lines, Labor
since 26 July 2022
Speaker of the House of Representatives
Milton Dick, Labor
since 26 July 2022
Anthony Albanese, Labor
since 23 May 2022
Sussan Ley, Liberal
since 13 May 2025
Structure
Seats226 (150 MPs, 76 Senators)
House of Representatives political groups
Government (94)
  •   Labor (94)

Opposition (43)
Coalition

Crossbench (13)

  •   Greens (1)
  •   Katter's Australian (1)
  •   Centre Alliance (1)
  •   Independent (10)[c]
Senate political groups
Government (29)

Opposition (27)
Coalition

Crossbench (20)

  •   Greens (10)
  •   One Nation (4)
  •   Lambie Network (1)
  •   United Australia (1)
  •   Australia's Voice (1)
  •   Independent (3)[f]
Length of term
House: 3 years (maximum)
Senate: 6 years for state senators, 3 years for territory senators (fixed except under double dissolution)
Elections
House of Representatives voting system
Full preferential voting[3]
Single transferable vote (proportional representation)[3]
Last House of Representatives election
3 May 2025
Last Senate election
3 May 2025 (half)
Next House of Representatives election
On or before 23 September 2028
Next Senate election
On or before 20 May 2028 (half)
RedistrictingRedistributions at least every seven years by the Redistribution Committee[4]
Meeting place
House of Representatives Chamber
Senate Chamber
Website
aph.gov.au

The Parliament of Australia (officially the Parliament of the Commonwealth[5] and also known as the Federal Parliament) is the federal legislature of Australia. It consists of three elements: the monarch of Australia (represented by the governor-general), the Senate (the upper house), and the House of Representatives (the lower house).[5] The Parliament combines elements from the British Westminster system, in which the party or coalition with a majority in the lower house is entitled to form a government, and the United States Congress, which affords equal representation to each of the states, and scrutinises legislation before it can be signed into law.[6]

The upper house, the Senate, consists of 76 members: twelve for each state, and two for each of the self-governing territories. Senators are elected using the proportional system and as a result, the chamber features a multitude of parties vying for power.[7] The governing party or coalition has not held a majority in the Senate since 2007 and usually needs to negotiate with other parties and independents to get legislation passed.[8]

The lower house, the House of Representatives, currently consists of 150 members, each elected using full preferential voting from single-member electorates (also known as electoral divisions or seats).[9][10] This tends to lead to the chamber being dominated by two major political groups, the centre‑right Coalition (consisting of the Liberal and National parties) and the centre‑left Labor Party. The government of the day must achieve the confidence of this House in order to gain and remain in power.

The House of Representatives has a maximum term of three years, although it can be dissolved early. The Senate has fixed terms, with half of the state senators' terms expiring every three years (the terms of the four territory senators are linked to House elections). As a result, House and Senate elections almost always coincide. A deadlock-breaking mechanism known as a double dissolution can be used to dissolve the full Senate as well as the House if the Senate refuses to pass a piece of legislation passed by the House.[11]

The two houses of Parliament meet in separate chambers of Parliament House (except in rare joint sittings) on Capital Hill in Canberra, Australian Capital Territory.

  1. ^ "The First Commonwealth Parliament 1901". Australian Electoral Commission. Archived from the original on 2 December 2023. Retrieved 28 November 2023.
  2. ^ "Liberal Party to launch legal action after losing Sydney seat of Bradfield at federal election". ABC News. 14 July 2025.
  3. ^ a b "Federal elections". Parliamentary Education Office. 10 November 2023. Archived from the original on 17 December 2023. Retrieved 17 December 2023.
  4. ^ Muller, Damon (25 August 2022). "The process of federal redistributions: a quick guide". Parliament of Australia. Research Paper Series, 2022–23.
  5. ^ a b Australian Constitution s 1 – via Austlii.
  6. ^ Beck, Luke (2020). Australian Constitutional Law: Concepts and Cases. Cambridge University Press. pp. 16–25. ISBN 978-1-108-70103-7. OCLC 1086607149.
  7. ^ "Odgers' Australian Senate Practice Fourteenth Edition Chapter 4 – Elections for the Senate". Parliament of Australia. 2017. Archived from the original on 9 May 2019. Retrieved 25 March 2017.
  8. ^ Williams, George; Brennan, Sean; Lynch, Andrew (2014). Blackshield and Williams Australian constitutional law and theory : commentary and materials (6th ed.). Annandale, NSW: Federation Press. p. 415. ISBN 9781862879188.
  9. ^ "House of Representatives Practice, 6th Ed – Chapter 3 – Elections and the electoral system". Parliament of Australia. 2015. Archived from the original on 27 March 2022. Retrieved 25 March 2017.
  10. ^ "A Short History of Federal Election Reform in Australia". Australian Electoral Commission. 8 June 2007. Archived from the original on 4 March 2022. Retrieved 1 July 2007.
  11. ^ "Odgers' Australian Senate Practice Fourteenth Edition Chapter 21 – Relations with the House of Representatives". Parliament of Australia. 2017. Archived from the original on 16 March 2022. Retrieved 22 March 2017.


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