Flags of Australia

Commonwealth of Australia

Who & why: the six British colonies — New South Wales, Victoria, Queensland, South Australia, Western Australia, and Tasmania — vote by referendum to federate, becoming the Commonwealth of Australia on 1 January 1901. A public design competition that same year produces the winning flag; the Commonwealth government formally fixes it in law as the Australian National Flag under the Flags Act 1953, effective 1954, with no change to the design itself.

What it represents: the Union Jack in the canton marks the federation's origin within the British Empire and Commonwealth; the large seven-pointed Commonwealth Star below it originally stood for the six founding states plus the territories; five white stars on the fly form the Southern Cross, the constellation visible only from the southern hemisphere.

British colonial Australia (six colonies)

Who & why: Britain establishes a penal colony at Sydney Cove on 26 January 1788, transporting convicts to what it names New South Wales. Five further colonies split off or are separately founded across the century — Tasmania (1825), Western Australia (1829), South Australia (1836), Victoria (1851), and Queensland (1859) — each gaining its own responsible self-government by the second half of the 19th century while remaining separate British possessions with no shared government until federation.

What it represents: the Union Jack, Britain's own flag, flew as the formal colonial ensign throughout; each colony later flew its own Blue Ensign variant with a distinct badge in the fly, but the shared Union Jack canton is the constant across the whole pre-federation era.

Cost to Aboriginal and Torres Strait Islander nations: British settlement is founded on the legal fiction of terra nullius — land belonging to no one — not formally overturned until the High Court's 1992 Mabo decision. Smallpox devastates the Sydney region's Aboriginal population within a year of the First Fleet's arrival; frontier violence follows colonial expansion across the continent for well over a century, with the University of Newcastle's Colonial Frontier Massacres project alone documenting more than 400 confirmed mass-killing events between 1788 and the 1930s. Aboriginal nations are progressively dispossessed of their own country, their governance and law broken up, and surviving communities forced onto missions and reserves far from traditional land — the process the map above traces as hundreds of named nations give way to six colonial administrations with no Aboriginal or Torres Strait Islander voice in their government.

Aboriginal and Torres Strait Islander Australia

Who & why: archaeological evidence places Aboriginal peoples on the continent for at least 65,000 years, organized into several hundred distinct nations and language groups with their own law, land custodianship, and oral tradition — the oldest continuous living culture documented anywhere in the world. Territorial and legal knowledge across this diversity was carried and transmitted through songlines — oral and performative pathways encoding real, checkable navigational and geographic information across vast distances; a 2014 study of Wardaman songline navigation by astronomer Ray Norris and Wardaman elder Bill Yidumduma Harney confirmed such traditions functioned as genuine, working wayfinding systems, not merely narrative custom. The anthropologist Norman Tindale's 1940 map cataloguing the approximate territories of these nations remains a foundational reference informing the modern AIATSIS Map of Indigenous Australia still in use today — though both carry their own explicit caution that any drawn boundary is necessarily approximate, which is why the map above names a representative few of these nations without drawing borders around any of them. Torres Strait Islander peoples, culturally and linguistically distinct, inhabit the islands between Australia and New Guinea. No single continent-wide political entity ever existed in this era, and none is invented here to stand in for one.

What it represents: flags as a European heraldic form were never part of pre-contact Aboriginal or Torres Strait Islander culture; this entry is left honestly blank rather than retrofitted with a symbol. The Aboriginal Flag and Torres Strait Islander Flag now in wide use were both designed in the 1970s–90s, well within the modern era, and are outside this page's pre-1788 scope.