
The Australian Senate is the upper house of the bicameral Parliament of Australia, with the House of Representatives forming the lower house. The Australian Constitution provides that each of the six original states is entitled to at least six senators, with a total of 76 senators in the Senate. The number of senators allocated to each state is based on its population, with each state currently having twelve senators. The Senate has the same legislative power as the House of Representatives, except in the area of taxation and appropriation bills, where it can only pass or reject them.
| Characteristics | Values |
|---|---|
| Total number of senators | 76 |
| Senators from each of the six Australian states | 12 |
| Senators from the Australian Capital Territory and the Northern Territory | 2 each |
| Number of members in the House of Representatives | 150 |
| Senators from the Liberal Party of Australia | 21 |
| Senators from the Liberal National Party of Queensland | 4 |
| Senators from the Nationals | 2 |
| Senators from the Australian Greens | 10 |
| Senators from Pauline Hanson's One Nation | 4 |
| Senators from the Jacqui Lambie Network | 1 |
| Senators from the United Australia Party | 1 |
| Senators from Australia's Voice | 1 |
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What You'll Learn
- There are a total of 76 senators in Australia
- Twelve senators are elected from each of the six Australian states
- Two senators represent the Australian Capital Territory and the Northern Territory
- Senators serve six-year terms, with only half of the state Senate seats up for re-election every three years
- The Australian Labor Party and Liberal Party of Australia held the most seats as of 1 July 2025

There are a total of 76 senators in Australia
The Parliament of Australia consists of the Senate as the upper house and the House of Representatives as the lower house. The Senate is comprised of 76 senators in total. Twelve senators are elected from each of the six Australian states, regardless of population size, and two senators are elected from each territory: the Australian Capital Territory and the Northern Territory. The Northern Territory senators also represent the Australian external territories of Christmas Island and the Cocos (Keeling) Islands, while the Australian Capital Territory senators represent the Jervis Bay Territory and Norfolk Island.
The Senate was modelled after the United States Senate, giving equal representation to each state. The Constitution allows Parliament to determine the number of senators by legislation, provided that the six original states are equally represented. Each original state is entitled to at least six senators, but this does not apply to any newly admitted states or territories.
The House of Representatives, on the other hand, has 150 members. Each state is allocated seats based on its population, but each original state, regardless of size, is guaranteed at least five seats. The number of members in the House of Representatives must be, as stated in Section 24 of the Constitution, "as nearly as practicable, twice the number of senators", commonly referred to as the "nexus clause".
The Senate has the same legislative power as the House of Representatives, except that it may only pass or reject taxing or appropriation bills, not originate or amend them. The Senate plays an active role in legislation and has passed resolutions indicating its intention to use the re-count method to allocate seats during future double dissolutions.
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Twelve senators are elected from each of the six Australian states
The Australian Senate, the upper house of the bicameral Parliament of Australia, is made up of 76 senators. Twelve senators are elected from each of the six Australian states, regardless of population size. This means that a total of 72 senators represent the six states. The remaining four senators represent the territories: two senators represent the Northern Territory, and the other two represent the Australian Capital Territory.
The six Australian states are entitled to equal representation in the Senate. Each state is guaranteed at least six senators. This principle of equal representation for the six original states is enshrined in the Constitution, which allows Parliament to determine the number of senators by legislation. However, these provisions do not apply to any newly admitted states or territories.
The Senate plays an active role in legislation and was modelled in part after the United States Senate, which also gives equal representation to each state. The Australian Senate has the same legislative power as the House of Representatives, except that it cannot originate or amend taxing or appropriation bills; it can only pass or reject them.
The Senate's composition, powers, and role are outlined in Chapter I of the federal constitution, federal legislation, and constitutional convention. Senators are popularly elected through the single transferable vote system of proportional representation in state-wide and territory-wide districts. This system ensures that the Senate reflects the diverse political landscape of Australia, including the interests of the states and territories.
The Senate's size has evolved over time. From 1901 to 1949, it comprised 36 senators. The number increased to 60 senators before 1975 and then to 64 in 1975. As of 2022, there are 76 senators, with 40 seats up for election: six from each state and two from each territory.
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Two senators represent the Australian Capital Territory and the Northern Territory
The Australian Senate is the upper house of the bicameral Parliament of Australia. There are 76 senators in total. Twelve senators are elected from each of the six Australian states, and two senators represent the Australian Capital Territory and the Northern Territory.
The Australian Capital Territory senators represent the Jervis Bay Territory and Norfolk Island. The two senators from the Northern Territory represent the residents of the Northern Territory, as well as the Australian external territories of Christmas Island and the Cocos (Keeling) Islands.
The territories were granted Senate representation in 1973. The Australian Capital Territory was granted representation in 1948, and the Northern Territory in 1922. However, the territorial representatives only had limited voting rights until 1968. The Senate has the power to block annual appropriations bills required to fund the government.
The Senate has the same legislative power as the House of Representatives, except that it cannot originate or amend taxing or appropriation bills; it can only pass or reject them. The House of Representatives is the lower house of the Australian Parliament, and it is made up of single-member electorates with a population of roughly equal size.
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Senators serve six-year terms, with only half of the state Senate seats up for re-election every three years
The Australian Senate, the upper house of the bicameral Parliament of Australia, consists of 76 senators. Twelve senators are elected from each of the six Australian states, regardless of population, and two senators are elected from each territory: the Australian Capital Territory and the Northern Territory. Senators are popularly elected under the single transferable vote system of proportional representation in state-wide and territory-wide districts. Importantly, the Constitution guarantees that each of the six original states is entitled to at least six senators.
The Senate plays an active role in legislation and has the same legislative power as the House of Representatives, except in the area of taxation and appropriation bills, where it can only pass or reject them. Senators serve six-year terms, and a unique aspect of the Australian Senate is that only half of the state Senate seats are up for re-election every three years. This staggered election system ensures stability and continuity in the Senate, allowing for a more consistent representation of states' interests.
This staggered election process for senators is a distinctive feature of the Australian political system. In 2022, for example, during a half-Senate election, 40 seats were up for election: six from each state and two from each territory. This process ensures that every three years, there is a partial renewal of the Senate, providing a balance between institutional memory and new perspectives.
The exception to the staggered election system occurs in the case of a double dissolution, where all Senate seats may be contested. However, this scenario is relatively rare and typically arises from specific constitutional triggers. The "elected-order" method has been used in double dissolution elections since 1987, impacting the usual staggered nature of Senate elections.
In summary, the Australian Senate's structure, with senators serving six-year terms and only half of the state Senate seats up for re-election every three years, promotes stability and a balanced representation of the states. This system, combined with the proportional representation voting method, ensures that the Senate plays a meaningful role in Australia's legislative process and effectively represents the diverse interests of the Australian people.
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The Australian Labor Party and Liberal Party of Australia held the most seats as of 1 July 2025
The Australian Senate is the upper house of the bicameral Parliament of Australia, with the House of Representatives being the lower house. The Australian Constitution allows Parliament to determine the number of senators by legislation, provided that each of the six original states is equally represented with a minimum of six senators. The number of senators in the Australian Parliament has changed over time. From 1901 to 1949, the Senate had 36 members, which increased to 60 in 1949 and then to 64 in 1975. Currently, there are 76 senators in the Australian Parliament, with 12 senators elected from each of the six states and two each from the Australian Capital Territory and the Northern Territory. Senators are elected for six-year terms, with only half of the state Senate seats going up for re-election every three years.
As of 1 July 2025, the Australian Labor Party and the Liberal Party of Australia held the most seats in the Senate, with 21 each. The Liberal National Party of Queensland and The Nationals held four and two seats, respectively. The Australian Greens had a significant presence with 10 seats, while minor parties such as Pauline Hanson's One Nation and Jacqui Lambie Network held four and one seats, respectively. The United Australia Party and Australia's Voice also had one senator each.
Historically, a two-party system has dominated both houses of the Australian Parliament, with the Australian Labor Party (ALP) and the anti-Labor parties, including the predecessor of the modern-day Liberal Party of Australia, being the major forces. The emergence of minor parties as a political force in the Senate in recent decades has disrupted this two-party system. The Democratic Labor Party (DLP), formed after the ALP split in 1955, was the first minor party to obtain the balance of power in the Senate. Since then, the Australian Democrats and the Australian Greens have also held the balance of power at various times, leading to a pattern of non-government control of the Senate where the government relies on minor party support to pass legislation.
The Australian Senate plays an active role in legislation and has the same legislative power as the House of Representatives, except in the area of taxation and appropriation bills, where it can only pass or reject them. The Senate's ability to block supply bills, as seen in the 1975 Australian constitutional crisis, highlights its influence and potential to impact the stability of the government.
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Frequently asked questions
There are 76 senators in the Australian Senate.
Twelve senators are elected from each of the six Australian states, regardless of population.
Two senators each represent the Australian Capital Territory (including the Jervis Bay Territory and Norfolk Island) and the Northern Territory (including the Australian Indian Ocean Territories, Christmas Island, and the Cocos (Keeling) Islands).
Only half of the state Senate seats go up for re-election every three years, as they serve six-year terms. However, territory senators do not have staggered terms.

























