
Australia is a unique country with a diverse range of characteristics that set it apart from its neighbouring countries. Officially known as the Commonwealth of Australia, it is a federal parliamentary democracy and constitutional monarchy with a strong economy and a highly urbanised population of nearly 28 million people. As the sixth-largest country in the world, Australia boasts a wide variety of landscapes and climates, from deserts in the interior to tropical rainforests along the coast. Its geographic isolation has resulted in a high proportion of unique flora and fauna, with 94% of its amphibians, 93% of its reptiles and flowering plants, 69% of its mammals, and 46% of its birds being endemic. In terms of size, Australia is the smallest continent but one of the largest countries, with a total area of 7,688,287 square kilometres. It is surrounded by the Pacific and Indian Oceans in the Southern Hemisphere and shares maritime borders with Indonesia, Papua New Guinea, New Zealand, and other neighbouring countries. Australia has a federal form of government, with a national government for the Commonwealth and individual state governments, and it has strong protections for civil and political rights, ranking highly for civil liberties.
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What You'll Learn

Australia is the planet's sixth-largest country
Australia's landmass accounts for just five percent of the world's total land area, and the country is surrounded by the Indian and Pacific Oceans. It is separated from Asia by the Arafura and Timor Seas, with the Coral Sea lying off the Queensland coast, and the Tasman Sea between Australia and New Zealand.
The country is divided into states, two of which are the second and third largest in the world. Western Australia covers 2.5 million square kilometres, and Queensland 1.8 million square kilometres. The largest state in the US, Alaska, covers 1.7 million square kilometres.
In terms of population, Australia is home to 24.16 million people, far fewer than the 323.1 million in the US, 1.324 billion in India, 1.379 billion in China, 44.5 million in Central America, and 422.5 million in South America.
Australia has the second-highest amount of wealth per adult, after Luxembourg, and the thirteenth-highest financial assets per capita. It has high levels of economic freedom and competitiveness and was ranked tenth in the 2022 Human Development Index.
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Australia has a high life expectancy
The country has a population of approximately 27-28 million people, with a highly urbanized population concentrated on the eastern seaboard. Its abundant natural resources and well-developed international trade relations contribute to its economic success and the overall well-being of its citizens. Australia's diverse landscape and varying climates, from deserts in the interior to tropical rainforests along the coast, also contribute to its high life expectancy by providing a range of healthy and natural environments for its citizens to live in.
Australia's healthcare system is known for its universal coverage and high-quality services. The country has a strong commitment to protecting human rights, as evidenced by its signing of numerous international rights treaties. Important legislation such as the Racial Discrimination Act 1975, the Sex Discrimination Act 1984, the Disability Discrimination Act 1992, and the Age Discrimination Act 2004 further demonstrate Australia's dedication to the health and well-being of its citizens, contributing to its high life expectancy.
The country's diverse and unique flora and fauna also play a role in its high life expectancy. Being one of 17 megadiverse countries, Australia has a wide range of ecosystems and about 94% of its amphibians, 93% of its reptiles and flowering plants, 69% of its mammals, and 46% of its birds are endemic. This diversity provides a wealth of natural resources and contributes to the overall health and longevity of its citizens.
Additionally, Australia's cultural diversity, with one of the highest foreign-born populations in the world, brings a range of perspectives and experiences that contribute to the overall well-being and longevity of its citizens. The country's strong protections for civil and political rights, as well as its high per capita income, further enhance the quality of life and health outcomes for Australians.
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Australia's population is 28 million
Australia is the sixth-largest country in the world by area, after Russia, Canada, China, the USA, and Brazil. It accounts for just 5% of the world's land area, and although it is the smallest continental land mass, it is the largest island. Australia's population, however, is relatively small compared to its land mass. Australia's population is currently around 26 to 27 million people, and it ranks 55th in the list of countries by population.
Australia's population has been steadily increasing over the years. In 1901, the population was 3.8 million, and by 2021, it had increased to 25.7 million. The population in 2022 was 26 million, and it is projected to reach between 34.3 and 45.9 million by 2071. The population growth rate is expected to decline, with the ten-year average annual growth rate of 1.4% projected to decrease to between 0.2% and 0.9%.
The population of Australia is heavily urbanized, with 86.5% of the population living in urban areas as of 2025. The urban population has increased significantly over time, rising from 58% in 1911 to 90% in 2021. The median age in Australia is around 38 to 39 years, and the median age is projected to increase to between 43.8 and 47.6 years by 2071.
Australia has a high proportion of its population born overseas. As of June 30, 2024, 8.6 million people, or 31.5% of the population, were born outside Australia. The countries of birth with the largest populations in Australia are England, India, China, and New Zealand. Melbourne and Perth have been experiencing notable population growth, with Perth having the highest growth rate of 3.1% in 2023-24.
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Australia has a diverse culture
Indigenous Australians have a deep connection to the land, with a history dating back 50,000 to 65,000 years. During the British settlement, Aboriginal Australians spoke 250 distinct languages, showcasing the richness of their cultural heritage. This ancient culture has left an indelible mark on modern Australia, with its unique art, music, and spiritual practices.
Since the late 18th century, British, Celtic, and U.S. influences have been significant. This is evident in Australia's parliamentary democracy government, which mirrors the system in the United Kingdom, and the continued recognition of Queen Elizabeth II as the ceremonial head of state.
However, the country has evolved beyond its colonial roots. The influx of immigrants from Asia and other non-English-speaking countries has transformed Australia's demographic profile and popular culture. This diversity is reflected in the country's cuisine, arts, and social fabric, making Australia a melting pot of cultures.
In addition to its cultural diversity, Australia is also geographically diverse. As the sixth-largest country in the world, it boasts a wide variety of landscapes, from desert regions to tropical rainforests. The country experiences a diverse range of climatic conditions, from the hottest regions in the northwest to the cooler southeast. The summer monsoon brings significant rainfall to northern Australia, while the south experiences winter rainfall.
Australia's diverse culture, shaped by its indigenous roots, colonial history, and modern immigration, contributes to its unique character and makes it a dynamic and fascinating country.
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Australia is a constitutional monarchy
The monarchy of Australia is a central component of the country's system of government, with the monarch serving as the sovereign. While the monarch is the head of state, they act on the advice of the elected Australian government, following the model of a constitutional monarchy. This model ensures that the monarch is a unifying symbol, operating above politics. The Australian Constitution and the Australia Act 1986 outline the roles and responsibilities of the monarch and the governor-general, with the latter position having been held by Australians since 1965.
The concept of allegiance to the monarch remains constitutionally significant in Australia, particularly in determining an "alien" under Section 51(xix). Historically, oaths of office and citizenship included pledges of allegiance to the reigning monarch, but these have been replaced by affirmations of allegiance to Australia and its values. The monarchy in Australia has been a subject of debate, with some advocating for a republic and others emphasising the symbolic value of the constitutional monarchy.
As a constitutional monarchy, Australia's system of government is based on a combination of written and unwritten rules, with the sovereign, governors, and governor-general playing key roles. The monarchy's persistence in Australia is seen by some as 'peculiar', with ongoing discussions about the relevance of the monarchy in a modern democracy. However, Australia's unique constitutional monarchy has evolved to incorporate features specific to the country's Constitution, reflecting a talent for compromise and adaptation.
In summary, Australia is a constitutional monarchy with a British monarch as its head of state. The monarchy is a fundamental part of Australia's government, operating within a democratic framework. The monarch's role is largely ceremonial, and they are expected to act on the advice of the elected government, reflecting the country's unique blend of traditions and modern political ideals.
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Frequently asked questions
Australia is the planet's sixth-largest country after Russia, Canada, China, the USA, and Brazil. It is the smallest of the seven continents and one of the largest countries by area.
Australia's population of almost 28 million is significantly less than that of the USA. For example, the whole of Australia has about the same number of people as the state of Texas.
Australia is the world's flattest and driest inhabited continent. Climate change has led to a 1.5 °C rise in Australian temperatures since 1910, an increase in extreme heat and heavy rainfall events, and a longer bushfire season since the 1950s.



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