The culture of Australia is primarily a Western culture, originally derived from the United Kingdom but also influenced by the unique geography of Australia and the cultural input of Aboriginal, Torres Strait Islander and other Australian people. The British colonisation of Australia began in 1788, and waves of multi-ethnic migration followed. Evidence of a significant Anglo-Celtic heritage includes the predominance of the English language, the existence of a democratic system of government drawing upon the British traditions of Westminster government, parliamentarianism and constitutional monarchy, American constitutionalist and federalist traditions, and Christianity as the dominant religion.

Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. Australia is the largest country by area in Oceania and the world's sixth-largest country. Australia is the oldest, flattest, and driest inhabited continent, with the least fertile soils. It is a megadiverse country, and its size gives it a wide variety of landscapes and climates, with deserts in the centre, tropical rainforests in the north-east, tropical savannas in the north, and mountain ranges in the south-east.