
Australia is often referred to as an 'island continent' due to being surrounded by the ocean. However, most geographers consider islands and continents to be separate, with islands being smaller than continents. By this definition, Australia's largest island is Tasmania, which is separated from the mainland by the Bass Strait. Tasmania is home to a diverse range of plant and animal life, including the famous Tasmanian devil. It has a population of around 570,000 to 575,000 people, with much of its population centred in Hobart.
| Characteristics | Values |
|---|---|
| Name | Tasmania |
| Area | 68,401 km² |
| Population | 556,000 (2022) |
| State | Tasmania |
| Highest Point | Mount Ossa (1,617 m) |
| Main Cities | Hobart, Launceston, Devonport |
| Access | By air: Hobart International Airport, Launceston Airport, Devonport Airport; By sea: Spirit of Tasmania ferry service from Melbourne |
| Attractions | Cradle Mountain-Lake St Clair National Park, Freycinet National Park, Port Arthur Historic Site, Bay of Fires, Tamar Valley Wine Region |
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What You'll Learn

Australia's largest island, Tasmania, is the size of Sri Lanka
Australia, often referred to as "the land down under", is known for its sun-drenched deserts, vast Outback, and seemingly endless coastline. Interestingly, Australia's largest island is not part of the mainland, but rather the island of Tasmania, located about 150 miles south of the Australian continent across the Bass Strait. Tasmania is roughly the size of Sri Lanka, covering an area of around 68,401 square kilometres or 26,410 square miles.
Tasmania is Australia's 26th largest island and the only state that is not part of the mainland. It is surrounded by 334 islands and is known for its ancient forests, rugged coastlines, and unique ecosystems. The island is home to a diverse range of plant and animal life, including the famous Tasmanian devil, a carnivorous marsupial that is sadly endangered due to a rare facial tumour disease. Other unique species include the Tasmanian tiger, once the island's apex predator until its extinction in the 20th century, and the platypus, which thrives in Tasmania's freshwater systems.
The separation of Tasmania from mainland Australia approximately 12,000 years ago allowed a distinct ecosystem to flourish. The island's landscapes are a blend of the familiar and the fantastical, with dense rainforests, alpine plateaus, and glacially carved lakes that contrast sharply with the desert expanses of mainland Australia. Tasmania is also one of the last true refuges for ancient plant species and endemic wildlife, making it a haven for scientists interested in biodiversity.
Tasmania has a population of approximately 533,308 people, with much of its population centred in Hobart. The rest of the island remains largely untouched wilderness, and Tasmanians are known for their dedication to sustainable living and conservation. Tasmania's cultural landscape is just as fascinating as its natural one, with a rich history of Aboriginal peoples and their distinct cultural practices, spiritual beliefs, and languages. Today, Tasmania honours this heritage while embracing modern Australian culture, making it a vibrant centre for art and tourism.
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Melville Island is Australia's second-largest island
Australia has 8,222 islands within its maritime borders. The largest island in Australia is Tasmania, which is followed by Melville Island, the second-largest island in the country.
Melville Island, also referred to as Yermainer, occupies an area of about 2,234 square miles or 5,786 square kilometres. The island is located in the Timor Sea, off the coast of the Northern Territory. The largest settlement on Melville Island is Milikapiti, with a population of 559. The second-largest settlement is Pirlangimpi (Pularumpi, formerly Garden Point), with a population of 440. About 30 more people live in five family outstations. Milikapiti, Pirlangimpi, and Paru are the main communities, which are serviced by schools, sports ovals, museums, and art and craft galleries.
The island, along with Bathurst and nine other uninhabited islands, forms part of the group known as the Tiwi Islands. The Tiwi Islands are under the jurisdiction of the Northern Territory in association with the Tiwi Land Council as the regional authority. The Tiwi are an Aboriginal Australian people, culturally and linguistically distinct from those of Arnhem Land on the mainland just across the water. In 2021, the total population of the Tiwi Islands was 2,348, of whom 87% were Aboriginal people. Most residents speak Tiwi as their first language and English as a second language.
Indigenous people have occupied the area that became the Tiwi Islands for at least 40,000 years. It is said that the first European to sight the island was Abel Tasman in 1644. Explorer Phillip Parker King, the son of governor of New South Wales Philip Gidley King, named it for Robert Dundas, 2nd Viscount Melville, first Lord of the Admiralty. Ownership of Melville Island was returned to the Tiwi people in 1978.
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Kangaroo Island is Australia's third-largest island
Australia has 8,222 islands within its maritime borders. The largest island in Australia is Tasmania, which is followed by Melville Island and Kangaroo Island, which is the third-largest island in the country.
Kangaroo Island is located in South Australia, about 8.4 miles from Adelaide. The island is 90 miles long from east to west and about 34 miles from its widest to its narrowest points. Its coastline is about 336 miles long, and its highest point is at Flinders Chase National Park. The island is separated from the Fleurieu Peninsula by the Backstairs Passage and from the Yorke Peninsula by Investigator Strait.
Kangaroo Island has a diverse landscape, with its coastlines, cliffs, and beaches. It is known for its wildlife, including sea lions, koalas, and diverse bird species. The island also has a thriving food and wine industry, with local produce and cellar doors attracting visitors.
The island is a popular tourist destination, with its remarkable natural beauty and unique attractions. Remarkable Rocks, a collection of granite boulders, and Admirals Arch, a natural archway, are two of the island's most iconic natural landmarks. The island also has a rich history, with early European exploration and settlement dating back to the 1800s. Today, it offers a range of accommodation and activities for visitors, from hiking and wildlife tours to food and wine experiences.
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Groote Eylandt is Australia's fourth-largest island
Australia has 8,222 islands within its maritime borders. Tasmania is the largest island, followed by Melville Island and Kangaroo Island. Groote Eylandt is Australia's fourth-largest island. It is the largest island in the Gulf of Carpentaria, occupying an area of about 882 square miles. The island is 390 miles from Darwin and 31 miles from the Northern Territory. It is 37 miles long (south to north) and 31 miles (west to east).
Groote Eylandt was named by the explorer Abel Tasman in 1644 and means "large island" in archaic Dutch. The original inhabitants of the island are the Anindilyakwa people (also known as Warnindhilyagwa), an Aboriginal Australian people. They consist of 14 clan groups which make up the two moieties on the island. The clans maintain their traditions and have strong ties with the people in the community of Numbulwar and on Bickerton Island. The island's population was 2,811 in the 2016 census.
Groote Eylandt is generally quite low-lying, with an average height of about 49 feet above sea level, though Central Hill reaches a height of about 719 feet. The island forms the Anindilyakwa Ward of East Arnhem Region, along with Bickerton Island and a few smaller satellite islands. Groote Eylandt has a variety of habitats, including dense stands of monsoon forests, coastal sand dunes, mangroves, and mudflats.
Alyangula is the main town on Groote Eylandt, with a population of 870. Most residents are non-Aboriginal miners, and manganese has been mined on the island since 1966. Groote Eylandt is a popular spot for fishing, and safaris can be organised for anglers.
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K'gari is the largest sand island in the world
Australia has 8,222 islands within its maritime borders. The largest of these is Tasmania, which is followed by Melville Island, Kangaroo Island, Groote Eylandt, Bathurst Island, and K'gari (also known as Fraser Island).
K'gari displays vastly different landscapes, ranging from freshwater lakes to sand dunes, wetlands, crystal-clear lakes, dense rainforests, eucalyptus woodland, mangrove forests, wallum, peat swamps, and coastal heaths. The island is famous for its coloured sands, which have been stained by decayed vegetation leaching into the sand for thousands of years. Some deposits are up to eight million years old.
K'gari is home to a small number of mammal species, as well as a diverse range of birds, reptiles, and amphibians. All hills on the island have been formed by sandblowing, and its dunes move at the rate of 1 to 2 metres per year due to year-round winds from the southeast. The dune movement creates overlapping dunes and sometimes intersects waterways and covers forests. The oldest dune system on K'gari is 700,000 years old, making it the world's oldest recorded sequence.
K'gari has been inhabited by the Butchulla people for thousands of years and is known as "paradise" in their traditional language. It was renamed Fraser Island by European settlers in 1847 after Captain James Fraser, whose ship, the Stirling Castle, was shipwrecked and died on the island in 1836. In 2021, the island was formally renamed K'gari (Fraser Island) in recognition of its traditional owners, the Butchulla people.
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Frequently asked questions
Tasmania is Australia's largest island. It is located about 150 miles from mainland Australia and is home to around 575,000 people.
Tasmania covers an area of about 64,519 to 68,401 square kilometres or 24,911 to 26,410 square miles.
Tasmania is known for its rugged coastlines, ancient forests, and unique ecosystems. It is home to a stunning variety of plant and animal life, much of which is found nowhere else on Earth, including the Tasmanian devil and the platypus.
Melville Island, also referred to as Yermainer, is the second-largest island in Australia, occupying an area of about 5,786 square kilometres or 2,234 square miles.











































