Territorial evolution of Australia

The League of Nations mandated northeast New Guinea to Australia after World War I, as well as Nauru, which was placed under joint Australian-British-New Zealand jurisdiction.

Australia has also obtained several small island territories, mainly from earlier British colonies, and has a large claim on Antarctica.

Key to map colours Parliament met in Melbourne until the federal capital could be built.

[67] In September 2022, it was announced the border between the Australian Capital Territory and New South Wales would change for the first time since it was created in 1911.

[89] ACT chief minister Andrew Barr said NSW premier Dominic Perrottet had agreed to a proposed border change for 330 hectares of land.