1799 in Australia

Leaders

• Monarch - George III
• Governor of New South Wales – John Hunter
• Lieutenant-Governor of Norfolk Island – Philip Gidley King
• Inspector of Public Works – Richard Atkins

  Events

• 7 January – Bass and Flinders complete their circumnavigation of Van Diemen's Land in sloop Norfolk.
• 11 February – The gaol in Sydney is burned by arsonists.
• 3 March – Hawkesbury River floods, killing one.
• 12 March – Isaac Nichols is accused of stealing stolen goods and sentenced to 14 years on Norfolk Island; his sentence is suspended by Governor Hunter on 1 April
• 8 July – Matthew Flinders leaves Port Jackson to explore the East coast in sloop Norfolk; he surveys Moreton Bay between the 15th and 31st and charts Hervey Bay on 2 August. He returns to Sydney on 20 August.
• 18 October – Five settlers are found guilty of killing aborigines in the Hawkesbury, they are later pardoned.
• 5 November – Hunter is recalled and Philip Gidley King is named as his successor
• 28 December – The gaol in Parramatta is lost to arson.

  Births

• 25 August – John Dunmore Lang
• 2 October – William Lonsdale
• 15 October – Archibald Mosman

  Deaths

• 26 January – Thomas Muir