The following lists events that happened during 1919 in Australia.
Incumbents
Monarch – George V
Governor-General – Sir Ronald Munro-Ferguson
Prime Minister – Billy Hughes
Chief Justice – Samuel Griffith (until 17 October) then Adrian Knox (from 18 October)
State premiers
Premier of New South Wales – William Holman
Premier of Queensland – T. J. Ryan (until 22 October), then Ted Theodore
Premier of South Australia – Archibald Peake
Premier of Tasmania – Walter Lee
Premier of Victoria – Harry Lawson
Premier of Western Australia – Sir Henry Lefroy (until 17 April), then Sir Hal Colebatch (until 17 May), then James Mitchell
State governors
Governor of New South Wales – Walter Davidson
Governor of Queensland – Hamilton Goold-Adams
Governor of South Australia – Sir Henry Galway
Governor of Tasmania – Francis Newdegate
Governor of Victoria – Sir Arthur Stanley
Governor of Western Australia – William Ellison-Macartney
Events
8 January – Strike leader Paul Freeman was arrested outside of Dobbyn, Queensland, sparking a chain of events that would lead to his deportation. 1 March – The Potts, believed to be the world's longest running cartoon strip drawn by the same artist, is first published in The Sun News-Pictorial. 24 March – one of the most notable incidents of the Red Flag Riots occurred in Brisbane, Queensland, when a crowd of returned servicemen clashed with police. The incident had been sparked the previous day by a socialist demonstration against the continued operation of the War Precautions Act, which had angered many of the returned soldiers. 1 June – A mutiny breaks out on the Royal Australian Navy battlecruiser shortly after it arrives in Fremantle, Western Australia. 28 June – The Treaty of Versailles is signed in France, bringing Australia's involvement in World War I to an end. 18 October – Sir Adrian Knox is appointed Chief Justice of the High Court. 28 October – The Treaty of Peace (Germany) Act 1919 receives Royal Assent, confirming Australia's membership as a sovereign nation in the new League of Nations, and indicating Australia's independence from the United Kingdom. 10 December – Keith and Ross Smith, piloting a Vickers Vimy, reach Darwin at the end of the first England to Australia flight. 19 December – A federal election is held. The incumbent Nationalist Party of Billy Hughes defeats the Australian Labor Party of Frank Tudor. 24 December – The Electrical Trades Union of Australia is federally registered under the Commonwealth Conciliation and Arbitration Act, 1904. The worldwide Spanish flu epidemic continues, eventually claiming almost 12,000 lives in Australia. At the Paris Peace Conference, 1919 Australian delegates succeed in excluding recognition of the principle of racial equality in the League of Nations Covenant.
Arts and literature
10 September – J. F. Archibald, founding editor of The Bulletin dies, bequeathing money which would be used to award the Archibald Prize for portraiture. Elioth Gruner wins the Wynne Prize for his work, Spring Frost.
Film
4 October – The Sentimental Bloke premieres in Melbourne.