1 January – A massive hailstorm strikes Sydney, causing hundreds of injuries and an estimated £1 million damage.[1]
6 February – William McKell stands down as Premier of New South Wales following royal approval of his appointment as Governor-General. The Labor Party elects James McGirr as its leader and the new Premier.[2]
15 March – A state election is held in Western Australia. The Labor government of Frank Wise is defeated by the Liberal/Country coalition led by Ross McLarty.[3]
3 May – A state election is held in Queensland. Ned Hanlon's Labor government is returned for its sixth term in government.[4]
1 April – The Woomera rocket range is established in South Australia as a testing site for British and Australian missiles.
5 May – A train derails in the Camp Mountain rail accident in Queensland, killing 16 people.
8 November – A state election is held in Victoria, after the upper houseblocks supply.[6] The Labor minority government of John Cain is defeated by a Liberal–Country coalition led by Thomas Hollway.[7]
18 November – Australia reduces its trade tariffs after ratifying the General Agreement on Tariffs and Trade (GATT) in Geneva.
18 December – Robert Cosgrove resigns as Premier of Tasmania after being indicted on charges of bribery and corruption. Edward Brooker is sworn in as his replacement the next day.[8]
26 December – Heard Island and McDonald Islands in Antarctica are transferred from British control to Australian territories.
17 January – William Dargie wins the Archibald Prize with his portrait of Marcus Clarke.[9]
Sport[]
30 August – Fred Fanning, in his last league match, kicks a VFL/AFL record of eighteen goals against St. Kilda[10]
20 September – Balmain win the 1947 NSWRFL season, claiming their tenth title after defeating minor premiers Canterbury-Bankstown 13–9. The newly formed Parramatta team finish in last place, claiming the wooden spoon.
27 September – Carlton 13.8 (86) defeats Essendon 11.19 85 to win the 51st VFL Premiership in the 1947 VFL Grand Final.