1915 in Australia

Incumbents

• Monarch – George V
• Governor-General – Ronald Munro-Ferguson
• Prime Minister – Andrew Fisher, then Billy Hughes
• Chief Justice – Samuel Griffith

  State premiers

• Premier of New South Wales – William Holman
• Premier of Queensland – Digby Denham, then T. J. Ryan
• Premier of South Australia – Archibald Peake, then Crawford Vaughan
• Premier of Tasmania – John Earle
• Premier of Victoria – Alexander Peacock
• Premier of Western Australia – John Scaddan

  State governors

• Governor of New South Wales – Gerald Strickland
• Governor of Queensland – Hamilton Goold-Adams
• Governor of South Australia – Henry Galway
• Governor of Tasmania – William Ellison-Macartney
• Governor of Victoria – Arthur Stanley
• Governor of Western Australia – Harry Barron

  Events

• 25 April – The Anzac tradition begins during World War I with a landing at Gallipoli on the Turkish coast.
• 30 April – Australian submarine AE2 sunk in Sea of Marmara.
• 6 June – The BHP steelworks opens in Newcastle, New South Wales.
• 19 July – Albert Jacka becomes the first Australian to win the Victoria Cross during the First World War.
• 9 August – Alexander Burton died at Lone Pine, Gallipoli, Turkey. He was awarded the Victoria Cross.
• 24 August – The town of Holbrook, New South Wales was renamed from Germanton.
• 10 October – Twenty six men left Gilgandra, New South Wales on the Cooee March; the first of the World War I Snowball marches. At each town on the route they shouted "cooee" to attract recruits; the march arrived in Sydney on 12 November with 263 recruits.
• 27 October – Billy Hughes becomes the seventh Prime Minister of Australia and the first to serve consecutive terms in office.
• 20 December – Completion of ANZAC evacuation from Gallipoli before dawn.

  Science and technology

• 10 December – Father and son scientists William Henry Bragg and William Lawrence Bragg win the Nobel Prize in Physics.

  Arts and literature

Sport

• Patrobas wins the Melbourne Cup
• 1914/15 the Sheffield Shield was won by Victoria; after this season it was not contested due to the war.
• The 1915 NSWRFL Premiership is won by Balmain.

  Births

• 6 February – Donald Friend, artist, writer and diarist
• 2 March – John Wear Burton, public servant and diplomat
• 3 March – Manning Clark, historian
• 22 March – Charlotte Anderson, professor of paediatrics
• 9 April – Bob Quinn, SANFL footballer
• 30 May – Michael Thwaites, poet, academic and intelligence officer
• 31 May – Judith Wright, poet
• 3 June – Jim McClelland, senator and government minister
• 20 June – Dick Reynolds, VFL footballer
• 16 July – David Campbell, poet
• 3 August – Arthur John Birch, organic chemist
• 26 October – Lindsay Pryor, botanist
• 2 November – May Campbell, field hockey player
• 25 November – Ron Hamence, cricketer
• 29 November – Bob Cotton, senator and government minister
• 31 December – John Murray, politician

  Deaths

• 11 January – James Wilkinson, Queensland politician
• 11 March – Thomas Alexander Browne, author
• 4 April – Sir Francis Bathurst Suttor, pastoralist and politician
• 19 April – Thomas Playford II, Premier of South Australia and federal Minister for Defence
• 25 April - William Henry Strahan Poet, farmer and politician dies during the Galipolli landings
• 2 June – George Randell, West Australian politician
• 25 June – Frederick Manson Bailey, botanist
• 28 June – Victor Trumper, cricketer
• 18 July – Marshall Hall, musician, composer
• 2 August – John Downer, Premier of South Australia
• 8 October – E. Phillips Fox, painter
• 20 November – Robert Barr Smith, businessman and philanthropist
• 4 December – George Richards, NSW politician
• 21 December – Thomas Sergeant Hall, geologist and biologist