Damon Mcknight
Australia is a country with a diverse range of ecosystems and a unique variety of flora and fauna. It is one of 17 megadiverse countries, with a wide range of endemic species. Australia has a relatively small population compared to its land area, with a population density of around 3-4 people per square kilometre. It is ranked 55th in the world for its population, which is heavily concentrated on the east coast, particularly in metropolitan areas such as Sydney, Melbourne, and Brisbane. Australia maintains strong international relations, particularly with the US, and is a member of various international organisations, including the United Nations and the OECD.
| Characteristics | Values |
|---|---|
| Population Density | 3.4-4 people per square kilometre |
| Total Land Area | 7,682,300 Km² (2,966,151 sq. miles) |
| Percentage of Urban Population | 86.51% (23,335,357 people in 2025) |
| Median Age | 38.3 years (2025); 39 years (2021) |
| Number of Government-Funded Universities | 37 |
| Number of Private Universities | 3 |
| Percentage of Australians with Vocational or Tertiary Qualifications | 58% |
| Tertiary Graduation Rate | 49% |
| Percentage of Australians with Higher Education Qualifications | 30.9% |
| Number of International Students in Australia's Universities and Vocational Institutions (2019) | 812,000 |
| Number of Named Species on the Australian National Species List (January 2025) | 168,386 |
| Estimated Percentage of Australian Species Yet to be Discovered and Classified | 70% |
| Estimated Number of Australian Native Species | 600,000 |
| Number of Countries Favourably Viewed by Australians (2021) | 8 (New Zealand, the United Kingdom, Japan, Germany, Taiwan, Thailand, the United States, and South Korea) |
| Number of Countries Receiving International Aid from Australia | 75 |
| Global Development Commitment to Development Index Ranking (2021) | 4 |
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What You'll Learn
Australia's population growth
Australia is the 54th or 55th most populous country in the world and the most populous country in Oceania. Its population is around 27,964,500 as of August 2025, with an annual growth rate of 1.8% per annum. This is a decrease from the previous rate of 2.54% per annum, though still above the OECD average of 0.523% in 2023.
The population of Australia has grown significantly since British colonisation in 1788, when the population was estimated to be between 300,000 and 2,400,000 Indigenous Australians. The population growth rate has fluctuated over time, peaking in the years 1912-1914 at 17.4 per thousand population and reaching a low of 7.1 per thousand population in 1934-1935 during the Great Depression. After World War II, the rate increased sharply due to a baby boom and immigration.
In recent years, Australia's population growth has been driven primarily by net overseas migration. In the year ending December 2023, net overseas migration accounted for 547,300 people, while the natural increase (births minus deaths) was 103,900. The total fertility rate in Australia is currently 1.5, which is below the replacement rate of 2.1. This has resulted in an aging population and a slow fall in the rate of natural increase.
The Australian population is highly urbanised, with 86.51% living in urban areas, particularly on the Eastern, South Eastern and Southern coastlines. The median age in Australia is 38.3 years, and the life expectancy is high at 83.2 years. With a population density of around 3-4 people per square kilometre, Australia is one of the most sparsely populated countries in the world.
The rapid pace of population growth in Australia has raised concerns about its impact on the environment, infrastructure, and costs of living. There are calls to lower net immigration to stabilise the population below 30 million and prevent further damage to local ecosystems and species, particularly along the east coast.
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Urbanisation and population density
Australia is a highly urbanised country, with a significant proportion of its population concentrated in urban areas and coastal regions. According to Worldometers, as of 2025, Australia has a population density of 4 people per square kilometre (9 people per square mile). This translates to approximately 3.5 people per square kilometre as of June 2024, according to the Australian Bureau of Statistics. The population density varies across different regions in Australia, with some areas classified as having high or very high density.
Urbanisation in Australia is prominent, with 86.51% of the population residing in urban areas as of 2025. This equates to around 23,335,357 people. The two largest cities, Sydney and Melbourne, are home to 40% of the population. Melbourne witnessed the most significant growth in 2023-24, increasing by 142,600 people, while Perth boasted the highest growth rate at 3.1%. Other capital cities, such as Brisbane, Perth, Canberra, and Adelaide, also experienced population increases, with some areas in these cities falling under the high or very high-density categories.
The distribution of Australia's population is uneven, with 90% of the populace inhabiting just 0.22% of the country's land area. This concentration is particularly evident along the coastline, where 87% of Australians reside within 50 kilometres of the coast. This uneven distribution has resulted in a lopsided urban-rural divide, with a significant majority of the population opting for urban living.
The urban centres of Australia have experienced consistent growth due to several factors. Overseas migration has been a significant contributor, with many people relocating to these cities from other countries. Natural increase, which is the excess of births over deaths, has also played a role in the expanding population. While internal migration has had a mixed impact, with some cities experiencing a net loss, it has nonetheless contributed to the overall urbanisation trend.
In summary, Australia's urbanisation and population density reflect a country with a highly concentrated urban populace. The majority of Australians opt for life in metropolitan areas, particularly in the large cities of Sydney and Melbourne. This trend has resulted in a lopsided distribution of the population, with a stark urban-rural divide and a significant proportion of the population living in close proximity to the coast. Understanding these dynamics is essential for effective urban planning, resource allocation, and addressing the challenges that arise from such concentrated urban development.
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International relations
Australia is a middle power with a strong commitment to international relations and cooperation. Its foreign relations are based on three core bipartisan pillars: a commitment to the US alliance, engagement with the Indo-Pacific region, and support for international institutions and rules.
Australia has close ties with the US, encompassing defence, security, and trade. This relationship is formalised through the ANZUS pact, and Australia's status as a major non-NATO ally. In the Indo-Pacific, Australia seeks to balance the rise of Chinese power by supporting the existing rules-based order while also increasing trade ties. Regionally, Australia is an active participant in organisations such as the Pacific Islands Forum, the Pacific Community, the ASEAN+6 mechanism, and the East Asia Summit.
Internationally, Australia is a member of several key global institutions. It is a founding member of the United Nations, and also part of the Commonwealth of Nations, the Organisation for Economic Co-operation and Development (OECD), and the G20. Australia is highly regarded in the international community, ranking fourth in the Center for Global Development's 2021 Commitment to Development Index.
The Australian government maintains an international aid program, providing assistance to about 75 countries. The country is also a significant contributor to global education, with the highest ratio of international students per capita in the world. In 2019, there were 812,000 international students enrolled in Australian universities and vocational institutions. Australia's higher education system includes 37 government-funded universities and three private universities, as well as other specialist institutions.
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Biodiversity
Australia is one of 17 megadiverse countries globally, with many plants, animals, and ecosystems found nowhere else on Earth. The country has a population of 23,335,357 people, a median age of 38.3 years, and a population density of 4 per Km² (9 people per mi²).
Unfortunately, Australia has suffered the largest decline in biodiversity of any continent since European colonisation over 200 years ago. The country now has the highest rate of extinctions in the modern world, with extinction rates far exceeding the global average for mammals. This decline in biodiversity is due to several factors, including invasive species, habitat loss, altered fire regimes, and changed water flows, all of which are now compounded by climate change.
The impacts of this biodiversity loss are far-reaching. It affects food security, with diverse species promoting a balanced diet and pollinating insects and animals being essential for a healthy food supply. It also impacts human health, as animal, plant, and microbial biodiversity are important sources of unique medicinal compounds. Additionally, the loss of biodiversity disrupts ecological functioning and undermines the ability of ecosystems to support humans.
To address this issue, interventions are needed to enhance future resilience, including improvements in resourcing, law, policy, and management. Indigenous land management practices and citizen science initiatives can also play a crucial role in conserving Australia's unique biodiversity.
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Education
Australia is a country with a diverse range of ecosystems and a highly urbanised population. It has a population density of around 3.4 to 4 people per square kilometre, making it one of the most sparsely populated countries globally. With a median age of 38.3 years in 2025, Australia, like many other developed nations, is experiencing a demographic shift towards an older population.
The country boasts a strong education system, with a range of government-funded and private universities, as well as specialist institutions offering higher education courses. Australia has 37 government-funded universities and three private universities. There are also other specialist institutions providing approved courses at the higher education level. The country is, however, considered one of the most expensive places to pursue higher education, according to the OECD.
Despite the costs, Australia has high education attainment rates. About 58% of Australians aged 25 to 64 have vocational or tertiary qualifications. With a tertiary graduation rate of 49%, Australia ranks first among OECD countries. Additionally, 30.9% of Australia's population has attained a higher education qualification, placing the country among the highest percentages worldwide.
The country also attracts a large number of international students. In 2019, there were 812,000 international students enrolled in Australian universities and vocational institutions. This gives Australia the highest ratio of international students per capita in the world.
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Frequently asked questions
There is only one country in Australia. However, Australia is one of 17 megadiverse countries and is part of Oceania.
As of 2025, Australia has a population of 23,335,357 people.
Australia has a population density of 3.4 to 4 people per square kilometre of total land area, making it one of the most sparsely populated countries in the world.
The median age in Australia is 38.3 years as of 2025. In 2021, the average age of the population was 39 years.
There are 37 government-funded universities and three private universities in Australia.
