Incumbents
- Monarch – King George V
- Governor-General – John Baird, Baronet of Stonehaven
- Prime Minister of Australia
- Premier of New South Wales – Thomas Bavin (until 4 November), then Jack Lang
- Premier of Queensland – Arthur Edward Moore
- Premier of South Australia – Richard Layton Butler (until 17 April), then Lionel Hill
- Premier of Tasmania – John McPhee
- Premier of Victoria – Edmond Hogan
- Premier of Western Australia – Philip Collier (until 24 April), then Sir James Mitchell
Read more about this topic: 1930 In Australia