1840 in Australia

• Monarch - Victoria

Governors of the Australian colonies:

• Governor of New South Wales – Sir George Gipps
• Governor of South Australia – Lieutenant Colonel George Gawler
• Governor of Tasmania – Captain Sir John Franklin
• Governor of Western Australia as a Crown Colony – John Hutt

• 3 January – The Melbourne newspaper The Herald is founded by George Cavenagh as The Port Phillip Herald.
• 13 January – The Battle of Yering occurs between Indigenous Australians of the Wurundjeri nation and the Border Police.
• March – Between 40 and 60 Jardwadjali Aboriginal people are killed in the Fighting Hills massacre. The Whyte brothers William, George, Pringle and James Whyte, cousin John Whyte and three convict employees, Benjamin Wardle, Daniel Turner and William Gillespie were responsible.
• April – Up to 60 Jardwadjali Aboriginal people are killed in the Fighting Waterholes massacre. The Whyte brothers William, George, Pringle and James Whyte and their employees were responsible.
• May – British Government agrees to cease sending convicts to New South Wales, some 80,000 convicts had been sent since 1788.{{cite book | issn = 1038-054X | title = The Bulletin Australian Almanac & Book of Facts 1992 | editor-last = Munday | editor-first = Rosemary | chapter = How Australia Began: Significant Dates in Australian History | location = Sydney | publisher = Australian Consolidated Press | year = 1991 | page = 3 }} Convicts still sent to Van Diemen's Land and Port Phillip District colonies.{{cite book | editor-first = Angus | editor-last = Cameron | title = The Australian Almanac: 800 Pages Crammed with Australian and World Facts: Politics, the Arts, Geography, History and Much More | chapter = Part One: Facts and Figures: An Australian Historical Chronology | publisher = Angus & Robertson | year = 1985 | page = 11 | location = North Ryde, New South Wales | isbn = 0-207-15108-3 }}
• 30 June – survivors of the Maria shipwreck are massacred by Aboriginal Australians on the Coorong.
• 25 August – Two Ngarrindjeri men are hanged on the Coorong in front of their tribe after being convicted in a drumhead court-martial of the murders of all 26 crew and passengers of the Maria shipwreck, Major Thomas O'Halloran, South Australian Police Commissioner, presiding and passing sentence.{{cite news | url = http://nla.gov.au/nla.news-article71619964 |title=Late Shipwreck and Murders at Encounter Bay | last = O'Halloran | first = Thomas | author-link = Thomas Shuldham O'Halloran | newspaper = Southern Australian | date = 11 September 1840 |access-date = 23 February 2013 | pages = 2–3 | via = National Library of Australia }}
• 11 October – the Lettsom raid in Melbourne, the mass-arrest and imprisonment of approximately 400 Wurundjeri, Woiworrung, Boonwurrung and Taungurung people (collectively known as the Kulin nation of Indigenous Australians).
• 2 November – Construction of The Causeway across the Swan River in Perth begins.
• Undated – Sydney City Council and Adelaide City Council are incorporated. A ratepayer required £1,000 worth of property to stand for election.
• Undated – An unknown number of Indigenous Australians are murdered by Angus McMillan's men at Nuntin and at Boney Point as part of a series of mass murders of Gunai Kurnai people known as the Gippsland massacres.

• 3 February – Allan McLean, 19th Premier of Victoria (d. 1911)
• 11 March – Ralph Tate, botanist and geologist (born in the United Kingdom) (d. 1901)
• 26 April – Paddy Hannan, prospector (born in Ireland) (d. 1925)
• 23 May – George Throssell, 2nd Premier of Western Australia (d. 1910)
• 4 November – William Giblin, 13th Premier of Tasmania (d. 1887)
• 8 December – William Guilfoyle, landscape gardener and botanist (d. 1912)
• Unknown – Tommy Windich, explorer (d. 1876)

• 28 January – Simeon Lord, merchant and magistrate (born in the United Kingdom) (b. 1771)
• 17 November – Henry Fulton, chaplain and writer (born in Ireland) (b. 1761)
• 24 December – Thomas Moore, settler (born in the United Kingdom) (b. 1762)

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Australia

Category:Years of the 19th century in Australia