How did the gold rush affect Australia's population?

The Gold Rush transformed Australia's population through one of the largest migrations in world history. The population grew from about 430,000 in 1851 to 1.7 million in 1871, with most of the growth concentrated in the colony of Victoria (which boomed from about 77,000 in 1851 to 540,000 in 1861) and the goldfields of central New South Wales.

Most arrivals came from Britain and Ireland. About 600,000 British and Irish migrants came to Australia between 1851 and 1860, drawn by gold and by the assisted-passage schemes that the colonies operated to attract labour. The Irish proportion (about 25 per cent of total arrivals) produced the strong Irish-Catholic presence that has shaped Australian Labor politics, religious life, and culture for more than a century. Continental Europeans including Germans, Scandinavians, Italians, and Greeks added diversity.

About 30,000 Chinese miners arrived on the Victorian goldfields by 1859, making them about 10 per cent of the Victorian population. Most came from southern China, particularly Guangdong province, often on credit tickets from agents who would be repaid from gold earnings. The Chinese miners faced discrimination including head taxes, segregated camps, and occasional violence including the Buckland River riots of 1857 and the Lambing Flat riots of 1861. The discrimination laid the basis for the later Immigration Restriction Act 1901 and the White Australia Policy, but the Chinese presence also contributed lasting traditions including Melbourne's Chinatown (the oldest in the southern hemisphere), agricultural and market gardening enterprises, and the famous Chinese-Australian families that have been part of country towns ever since.

American arrivals came largely from the California gold fields, bringing skills, equipment, and the experience of large-scale alluvial mining. The Eureka Stockade leader Peter Lalor and many other miner-activists were Irish, shaping the democratic demands of the goldfields. Indigenous Australians were largely dispossessed in the goldfields regions, with the Wathaurong, Dja Dja Wurrung, Wurundjeri, Yorta Yorta, and Wiradjuri peoples losing country and ceremonial sites. The Gold Rush also produced urban growth: Melbourne grew from about 23,000 in 1851 to 200,000 in 1861 and 469,000 in 1881, by which time it was the second-largest city in the British Empire after London. The population increase fundamentally shifted the political weight of the Australian colonies and accelerated the move toward federation in 1901.