1905 in Australia
|1905 in Australia|
|Governor-General||Henry Northcote, 1st Baron Northcote|
|Prime minister||George Reid, then Alfred Deakin|
|Elections||South Australia, Western Australia|
- Monarch – Edward VII
- Governor-General – Hallam Tennyson, 2nd Baron Tennyson (until 21 January), then Henry Northcote, 1st Baron Northcote
- Prime Minister – George Reid (until 5 July), then Alfred Deakin
- Chief Justice – Samuel Griffith
- Premier of New South Wales – Joseph Carruthers
- Premier of South Australia – John Jenkins (until 1 March), then Richard Butler (until 26 July), then Thomas Price
- Premier of Queensland – Arthur Morgan
- Premier of Tasmania – John Evans
- Premier of Western Australia – Henry Daglish (until 25 August), then Cornthwaite Rason
- Premier of Victoria – Thomas Bent
- Governor of New South Wales – Admiral Sir Harry Rawson
- Governor of South Australia – Sir George Ruvthen Le Hunt
- Governor of Queensland – Frederic Thesiger, 3rd Baron Chelmsford (from 30 November)
- Governor of Tasmania – Sir Gerald Strickland
- Governor of Western Australia – Admiral Sir Frederick Bedford
- Governor of Victoria – Major General Sir Reginald Talbot
- 1 March – John Jenkins resigns as Premier of South Australia to become Agent-General for South Australia in London. He is replaced by Richard Butler.
- 12 May – The first meeting of the Australian Council of Defence takes place between the Minister for Defence, the Treasurer, the Inspector-General Army, the Chief of Intelligence, and the Director of the Naval Forces.
- 18 May – A state election takes place in Queensland, returning the government of Arthur Morgan. Women are able to vote in Queensland state elections for the first time.
- 24 May – Empire Day is first celebrated in Australia.
- 28 May – The town of Maryborough in Queensland experiences an outbreak of pneumonic plague.
- 5 July – Alfred Deakin resumes office as Prime Minister of Australia after George Reid is unable to form a stable ministry.
- 26 July – A state election is held in South Australia. The Labor Party led by Thomas Price forms a minority government.
- 6 September – Last sighting of the clipper ship Loch Vennachar which sinks off Kangaroo Island, killing 32 people. Only one body was found.