1927 in Australia

Incumbents

• Monarch – George V
• Governor-General – John Baird, 1st Viscount Stonehaven
• Prime Minister – Stanley Bruce
• Chief Justice – Adrian Knox

  State premiers

• Premier of New South Wales – Jack Lang then Thomas Bavin
• Premier of Queensland – William McCormack
• Premier of South Australia – Lionel Hill then Richard Layton Butler
• Premier of Tasmania – Joseph Lyons
• Premier of Victoria – John Allan then Edmond Hogan
• Premier of Western Australia – Philip Collier

  State governors

• Governor of New South Wales – Sir Dudley de Chair
• Governor of Queensland – Sir John Goodwin
• Governor of South Australia – Sir Tom Bridges
• Governor of Tasmania – Sir James O'Grady
• Governor of Victoria – Arthur Somers-Cocks, 6th Baron Somers
• Governor of Western Australia – Sir William Campion

  Events

• 1 February – The North Australia Act of 1926 is enforced and the territory of Central Australia is created.
• 8 February – A cyclone makes landfall north of Cairns, causing flooding at Halifax Bay, Ingham, Innisfail, Tully, Cardwell and Townsville. Thirty-six people are killed, and twenty are missing.
• 9 April – A general election is held in Victoria.
• 3 May – The Australasian Council of Trade Unions is formed at the All-Australian Trade Union Congress in Melbourne.
• 9 May – Parliament House in Canberra is officially opened by the Duke of York.
• 20 May – Following a swing to the ALP in the Victorian election, Edmond Hogan forms a minority Labor government with Progressive support, and takes over as Premier of Victoria from John Allan.
• 29 June – Charles Kingsford Smith and his copilot Charles Ulm complete a round-Australia flight in ten days, five-and-a-half hours.
• 27 October – Melbourne gangster Squizzy Taylor is killed in a shootout with Sydney gangsters in Carlton.
• 3 November – The Sydney ferry Greycliffe is cut in half by the liner RMS Tahiti, killing 40 persons.

  Science and technology

• Professor Thomas Parnell begins the pitch drop experiment at the University of Queensland. It will go on to become the world's longest continuously-running scientific experiment.

  Arts and literature

• George Washington Lambert's portrait, Mrs Annie Murdoch wins the Archibald Prize

  Sport

• 27 August – Ronald McMurdo wins the men's national marathon title, clocking 3:06:23 in Sydney. The race was not considered an official Australian championship by the national athletics federation.
• 17 September - The 1927 NSWRFL season culminates in South Sydney's victory over St. George in the final
• 24 September – Collingwood become premiers of the 1927 VFL season, defeating Richmond 2.13 to 1.7 in the 1927 grand final.
• 1 November – Trivalve wins the Melbourne Cup.
• South Australia wins the Sheffield Shield

  Births

• 20 January – Dawn Lake, entertainer
• 21 January – Clive Churchill, rugby league player
• 15 April – Bob Ellicott, lawyer, politician and judge
• 20 March – Wally Grout, cricket player
• 1 April – Peter Cundall, horticulturist and television presenter
• 1 May – Michael Charlton, journalist and broadcaster
• 30 May – Billy Wilson, St George rugby league captain
• 6 June – Alan Seymour, playwright
• 10 June – Bede Morris, immunologist
• 13 June – David Kirkpatrick, country and western singer
• 3 July – Peter Muller, architect
• 13 July – Ian Reed, discus thrower
• 16 July – Geoffrey Martin, Australian rules footballer
• 17 July – Trixie Gardner, Baroness Gardner of Parkes, Australian-English dentist and politician
• 14 August – Sid Patterson, cyclist
• 22 September – Hal Nerdal, skier
• 29 October – Frank Sedgman, tennis player
• 10 November – Richard Connolly, composer and ABC personality
• 11 November – Jack Absalom, artist, author and adventurer
• 14 November – Bart Cummings, Australia's Best Racehorse Trainer
• 28 December – Ron Casey, Australian rules football administrator and media personality

  Deaths

• 7 January – Robert Jones, Irish-born Australian politician
• 15 March – Hector Rason, Premier of Western Australia
• 31 March – Paris Nesbit, lawyer
• 2 April – Edward Davies, architect
• 26 October – Squizzy Taylor, gangster
• 13 December – Stephen Henry Parker, Chief Justice of the Supreme Court of Western Australia