1904 in Australia

Incumbents

• Monarch – Edward VII
• Governor-General – Hallam Tennyson, 2nd Baron Tennyson, then Henry Northcote, 1st Baron Northcote
• Prime Minister – Alfred Deakin, Chris Watson, then George Reid
• Chief Justice – Samuel Griffith

  State premiers

• Premier of New South Wales – John See, Thomas Waddell, then Joseph Carruthers
• Premier of South Australia – John Jenkins
• Premier of Queensland – Arthur Morgan
• Premier of Tasmania – William Propsting, then John Evans
• Premier of Western Australia – Walter James, then Henry Daglish
• Premier of Victoria – William Irvine, then Sir Thomas Bent

  State governors

• Governor of New South Wales – Sir Harry Rawson
• Governor of South Australia – Sir George Ruthven Le Hunte
• Governor of Queensland – Sir Herbert Chermside
• Governor of Tasmania – Captain Sir Arthur Havelock, then Sir Gerald Strickland
• Governor of Western Australia – Admiral Sir Frederick Bedford
• Governor of Victoria – Major General Sir Reginald Talbot

  Events

• 6 January – The Tasmanian government replaces the state's Central Board of Health with a Public Health Department.
• 13 January – The flag of South Australia is officially gazetted as the current design.
• 23 January – A by-election is held for the New South Wales Legislative Assembly seat of Ryde. It is won by Edward Terry for the Liberal Reform Party.
• 29 February – Women's suffrage is granted in Tasmania.
• 1 June – A general election is held in Victoria. Incumbent premier Sir Thomas Bent is returned with an increased majority.
• 20 June – The P&O ship SS Australia is wrecked at the entrance to Port Phillip. There is no loss of life.
• 12 November – John Drayton is imprisoned under parliamentary privilege provisions in Western Australia.
• 1 December – Ipswich, Queensland is proclaimed as a city.

  Arts and literature

• 12 January – Melbourne businessman Alfred Felton leaves a large bequest to the Art Gallery of Victoria.
• Hans Heysen wins the Wynne Prize with Mystic Morn
• The Austral Hall Toowoomba was officially opened on 5 November 1904 by Sir Hugh Nelson, Lieutenant Governor of Queensland for The Austral Society.

  Sport

• September – The Australasian Lawn Tennis Association is formed in Sydney.
• 1 November – Acrasia wins the Melbourne Cup.
• New South Wales wins the Sheffield Shield.
• Two Australians, Corrie Gardner and Leslie McPherson, compete in athletics at the 1904 Summer Olympics. They do not return with any medals

  Births

• 7 April – Roland Wilson, economist
• 8 April – John Antill, musician and composer
• 29 May – Hubert Opperman, cyclist and politician

  Deaths

• 8 January – Alfred Felton, entrepreneur and philanthropist
• 25 January – Graham Berry, Premier of Victoria
• 2 February – Edward Braddon, Premier of Tasmania
• 12 April – George Cruickshank, politician
• 5 August – George Dibbs, Premier of New South Wales
• 17 December – William Shiels, Premier of Victoria