How a sparsely populated continent became one of the world's most urbanised nations
With just 3.7 people per square kilometre, Australia is one of the planet's most empty landscapes. Yet, nearly 90% of its residents live in concentrated urban hubs, driven by massive waves of global migration and a shifting demographic landscape.
Australia's demographic story is defined by extreme contrasts. While the interior's semi-arid and desert geography keeps the national population density remarkably low—ranking as the third least dense country after Mongolia and Namibia—the population is intensely concentrated. Most residents cluster along the Eastern, South Eastern, and Southern seaboards, creating a highly urbanised society where 89% of people live in a handful of cities.
The nation's composition has undergone profound shifts since British colonisation began in 1788. While the European share of the population rose sharply during the 18th and 19th centuries, it has been steadily declining as a percentage of the total. This is largely due to the end of the White Australia policy in 1973, which paved the way for modern multiculturalism. Today, Asia serves as the primary source of new arrivals, and the immigrant population accounts for 30% of the total—a higher proportion than any other nation with more than 10 million people.
Migration remains the primary engine of growth. In the 2022–23 period, net overseas migration hit a record 536,000 people. This influx helps offset a declining natural increase rate, which has been trending downward since 1962 due to falling fertility. Projections suggest that as the population ages, the natural increase—the balance of births and deaths—could fall below zero by the mid-2030s.
The continent's foundational history is equally complex. Human arrival is estimated to have occurred at least 65,000 years ago, likely from Indonesia and New Guinea. At the time of European contact, hundreds of Indigenous tribes spoke over 250 different languages, though today fewer than 20 remain in daily use across all age groups.
Source: Demographics of Australia
