- Type
- Upper house of the Parliament of Australia
- President
- Sue Lines , Labor , since 26 July 2022
- Leader of the government
- Penny Wong , Labor , since 1 June 2022
- Manager of government business
- Katy Gallagher , Labor , since 1 June 2022
- Leader of the opposition
- Michaelia Cash , Liberal , since 25 January 2025
- Manager of opposition business
- Jonathon Duniam , Liberal , since 25 January 2025
- Political groups
- Government (30) , Labor (30), Opposition (27) , Coalition , Liberal (23) , National (4) , Crossbench (19) , Greens (10), One Nation (4), Lambie Network ( 1 ), United Australia ( 1 ), Australia's Voice ( 1 ) Independent (2)
- Length of term
- 6 years (state senators), 3 years (territory senators)
- Voting system
- Proportional representation ( single transferable vote )
- Last election
- 3 May 2025 , ( Half Senate election )