1825 in Australia

Incumbents

• Monarch - George IV

  Governors

• Governor of New South Wales – Major-General Sir Thomas Brisbane
• Lieutenant-Governor of Tasmania – Colonel George Arthur

  Events

• 14 June – Van Diemen's Land is separated administratively from New South Wales.
• 3 December – Van Diemen's Land becomes fully independent from New South Wales. The Legislative Council of Tasmania is established and George Arthur, former Lieutenant-Governor, is promoted as its first Governor.

  Exploration and settlement

• 4 March – A penal settlement is established on Maria Island, Tasmania.
• Brisbane is founded.

  Deaths

• 25 February – Aboriginal bushranger, Musquito is hanged at Hobart.
• 7 December - John Ovens, explorer