1851 in Australia

Incumbents

Governors

• Governor of New South Wales — Sir Charles Augustus FitzRoy
• Governor of South Australia — Sir Henry Fox Young
• Lieutenant-Governor of Tasmania — Sir William Denison
• Lieutenant-Governor of Victoria — Charles La Trobe;
• Governor of Western Australia as a Crown Colony — Captain Charles Fitzgerald.

  Events

January–March

• 13 January — Charles Augustus FitzRoy was commissioned as "Governor-General of all Her Majesty's Australian possessions". This position was a forerunner of the Governor-General of Australia.
• 6 February – The Black Thursday bushfires rage from Mount Gambier to Melbourne. Fires covered a quarter of what is now the state of Victoria, approximately 50,000 km². Areas affected include Portland, the Plenty Ranges to the north of Melbourne, Westernport, the Wimmera and Dandenong districts. Approximately 12 people died, one million sheep and thousands of cattle were lost.
• 11 February — Tasmania plays Victoria in the first inter-colonial cricket match.
• 12 February — Edward Hargraves finds gold near Bathurst, starting the first of many Australian gold rushes.
• 28 February – Formation of an Anti-Transportation League from anti-transportation organisations in Victoria and Tasmania.

  April – June

• 7 April — Edward Hargraves proclaims the discovery of gold at Ophir, New South Wales. The gold was actually discovered by William Tom and John Lister.
• 10 April – The NSW Association for Preventing the Renewal of Transportation sends a petition to Queen Victoria.
• 28 May – The arrival of two convict ships, the Lady Kenneway with 249 male prisoners and Blackfriars with 260 female prisoners, further turns Tasmanian sentiment against transportation.
• 14 June – Gold found on the Turon River, New South Wales which proves to be the richest NSW goldfield.

  July – September

• 1 July – Victoria becomes a separate colony
• 2 July – the Melbourne Chamber of Commerce elects their first Chairman, William Westgarth, and Deputy Chairman, J.B.Were.
• 5 July — James Esmond announces the discovery of gold at Clunes, Victoria leading to the start of the Victorian Gold Rush.
• 7 July – News of the discovery of gold at Clunes, Victoria is published in the Geelong Advertiser.
• 10 July – A public meeting in Hobart, one of the largest ever held in Tasmania, calls for the end of transportation.
• 14 July – Sir William Denison, Lieutenant-Governor of Tasmania writes to Earl Grey supporting a continuation of transportation.
• 15 July — Charles La Trobe appointed as first Lieutenant Governor of Victoria.
• 22 July – Northern NSW landholders write to Earl Grey calling for Northern NSW to become a separate colony with transportation of labour. They complain of a shortage of labour due to men going to the goldfields.
• 29 July – 1500 people attend a public meeting to oppose transportation organised by the Australasian League
• 2 August — Gold is first discovered in Ballarat, Victoria, leading to the Victorian gold rush.
• 4 August – The Governor of Western Australia complains of receiving too many convicts as 300 ticket-of-leave men arrive unexpectedly.

  October – December

• 31 October – The New South Wales Legislative Council votes unanimously against transportation 'in any form what-so-ever, to any part of Her Majesty's Australian possessions'.
• 4 December – Charles LaTrobe forwards a Victorian Legislative Council motion passed unanimously opposing further transportation.
• 15 December – 14,000 gold miners meet at Forest Creek near Castlemaine. The Miners Flag or 'Diggers Banner' was flown for the first time at this meeting.

  Births

• Julian Ashton
• Charles Bannerman
• James Cuthbertson
• George Darrell
• H. B. Higgins
• Maggie Moore
• John Murray
• Richard O'Connor
• John Ford Paterson
• Robert Philp
• Rosa Praed
• George Turner
• Joseph Verco

  Deaths

• James Bicheno
• John Piper
• 26 August - Andrew Bent, newspaper proprietor