1798 in Australia

The following lists events that happened during 1798 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

 * 2 January – George Bass sights Wilsons Promontory
 * 26 January – The koala and lyrebird observed by John Price on an expedition led by John Wilson
 * 12 February – Matthew Flinders explores the Furneaux Islands
 * 25 February – John Hunter names Bass Strait in honour of George Bass
 * 14 May – HMS Nautilus arrives in Sydney, carrying missionaries from the London Missionary Society
 * 1 October – Sydney's first church St Philip's is destroyed by fire
 * 7 October – George Bass and Matthew Flinders leave Sydney to explore Van Diemen's Land on the Norfolk
 * 7 October – St Phillip's Church founded in Sydney, completed in 1809
 * 8 November – Nauru discovered by John Fearn
 * 9 December – Bass and Flinders confirm the existence of the Bass Strait
 * 22 December – Norfolk enters the Derwent River
 * 25 December – George Bass climbs Mount Wellington