1991 in Australia
The following lists events that happened during 1991 in Australia. == Incumbents == Monarch – Elizabeth II Governor-General – Bill Hayden Prime Minister – Bob Hawke (until 20 December), then Paul Keating Deputy Prime Minister – Paul Keating (until 3 June), then Brian Howe Opposition Leader – John Hewson Chief Justice – Sir Anthony Mason === State and territory leaders === Premier of New South Wales – Nick Greiner Opposition Leader – Bob Carr Premier of Queensland – Wayne Goss Opposition Leader – Russell Cooper (until 9 December), then Rob Borbidge Premier of South Australia – John Bannon Opposition Leader – Dale Baker Premier of Tasmania – Michael Field Opposition Leader – Robin Gray (until 17 December), then Ray Groom Premier of Victoria – Joan Kirner Opposition Leader – Alan Brown (until 23 April), then Jeff Kennett Premier of Western Australia – Carmen Lawrence Opposition Leader – Barry MacKinnon Chief Minister of the Australian Capital Territory – Trevor Kaine (until 6 June), then Rosemary Follett Opposition Leader – Rosemary Follett (until 6 June), then Trevor Kaine (until 21 June), then Craig Duby (until 21 June), then Gary Humphries (until 22 July), then Trevor Kaine Chief Minister of the Northern Territory – Marshall Perron Opposition Leader – Brian Ede President of the Legislative Assembly of Norfolk Island – David Buffett === Governors and administrators === Governor of New South Wales – Peter Sinclair Governor of Queensland – Sir Walter Campbell Governor of South Australia – Sir Donald Dunstan (until 5 February), then Dame Roma Mitchell Governor of Tasmania – Sir Phillip Bennett Governor of Victoria – Davis McCaughey Governor of Western Australia – Sir Francis Burt Administrator of Norfolk Island – Herbert MacDonald Administrator of the Northern Territory – James Muirhead == Events == === January === 1 January – The Australian Securities Commission commences operations, replacing the National Companies and Securities Commission.