1835 in Australia
- 12 April – The convict transport George III sinks in D'Entrecasteaux Channel, 139 male convicts drown.
- 6 June – Batman's Treaty is created between John Batman and Wurundjeri elders to secure the land around Port Phillip Bay for the establishment of Melbourne. The treaty was later declared void by the Governor of New South Wales, Richard Bourke.
- 6 August – Proclamation of Governor Bourke, a document which formally declared that the British Crown, relying on the doctrine of terra nullius, owned the whole of the continent of Australia.
- 10 October – The Proclamation of Governor Bourke is approved by the Colonial Office. Bourke's proclamation implemented the doctrine of terra nullius by proclaiming that Indigenous Australians could not sell or assign land, nor could an individual person acquire it, other than through distribution by the Crown.
- 29 December – Mary Gilbert gives birth to her son, James Port Phillip Gilbert, the first European child born in the Port Phillip settlement of Melbourne.