1823 in Australia

The following lists events that happened during 1823 in Australia.

Incumbents

The British Government, with the New South Wales Judicature Act, establishes the first Legislative Council in Australia, an advisory body of five appointed citizens. The Governor, Thomas Brisbane, has power of veto.
15 February – Surveyor James McBrien at the Fish River near Bathurst discovers gold. It is the first known report of gold, though it is not made public, the Australian gold rushes do not begin until 1851.
19 July –
* The Supreme Court of Civil Judicature of New South Wales is abolished by the Third Charter of Justice; it was replaced by the Supreme Court of New South Wales.
* The Governors Court is abolished by the Third Charter of Justice; it was replaced by the New South Wales Legislative Council.
* The Lieutenant Governor's Court is abolished by the Third Charter of Justice; it was replaced by the Supreme Court of Van Diemen's Land.
11 December – Richmond Bridge, the oldest bridge in Australia still in use, had its foundation stone laid.
The Vice Admiralty Court is established.
The Bank of Van Diemen's Land is established, it is Van Diemen's Land first commercial financial institution.

5 June – A path through the Liverpool Range, now known as Pandora's Pass, is found by Allan Cunningham.
31 October – John Oxley explores the Tweed River.
2 December – John Oxley become the first European to navigate the Brisbane River.

William Charles Wentworth publishes the first book of Australian verse, Australasia: A Poem, in London.