1818 in Australia

Incumbents

• Monarch - George III

  Governors

• Governor of New South Wales – Lachlan Macquarie
• Lieutenant-Governor of Van Diemen's Land – Colonel William Sorell

  Events

• 8 January – Governor Macquarie accuses Samuel Marsden of conspiracy against him
• 3 March – Throsby, Hume and Meehan discover an overland route to Jervis Bay
• 19 April – Phillip Parker King discovers Port Essington
• 28 May – John Oxley leaves Bathurst to explore along the Macquarie River

  Births

• 22 March – John Ainsworth Horrocks, one of the first settlers of the Clare Valley, is born near Preston, Lancashire
• 21 May – S. T. Gill
• 5 August - Thomas Elder, pastoralist
• 5 September – Edmund Kennedy
• Date unknown – Eliza Winstanley, stage actress and writer