Leslie Massey
Australia is a continent that includes a continental shelf overlain by shallow seas, which divide it into several landmasses. There are 8,222 islands within its maritime borders, including the main island of Tasmania, which is referred to as the Tasmanian mainland. The islands range in size from the world's largest sand island, K'gari, to tiny Christmas Island white-eyes. Australia's islands provide a haven for unique wildlife, such as the red-footed and brown boobies, and offer a glimpse into the country's geological history, like the exposed rocks on Macquarie Island.
| Characteristics | Values |
|---|---|
| Number of islands within maritime borders | 8,222 |
| Largest island | Tasmania (64,519 sq km) |
| Number of islands in Tasmania | 334 |
| Second-largest island | Melville Island, Northern Territory (5,786 sq km) |
| Third-largest island | Kangaroo Island, South Australia (4,416 sq km) |
| Largest sand island | K'gari (165,280 ha) |
| Islands with unique geological features | Macquarie Island |
| Most remote island | Lord Howe Island |
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What You'll Learn
- Australia has 8,222 islands within its maritime borders
- The largest islands by population are those connected to the mainland by bridge
- Tasmania is a large island state off the southeast coast of mainland Australia
- Macquarie Island was nominated for inscription on the World Heritage Register for its unique geological features
- Lord Howe Island is a small oceanic island in the Tasman Sea
Australia has 8,222 islands within its maritime borders
The largest of these islands is Tasmania, with a size of 64,519 square kilometres (24,911 sq mi) and a population of 570,000. Tasmania is considered a state in its own right and is home to many unique natural wonders, including Bruny Island, known for its fairy penguins and seal colonies. Other large islands include Melville Island in the Northern Territory, Kangaroo Island in South Australia, and Groote Eylandt, also in the Northern Territory.
Some of Australia's islands are renowned for their natural beauty and diverse ecosystems. K'gari, located off the coast of southern Queensland, is the largest sand island in the world, stretching over 123 kilometres with vastly different landscapes, from freshwater lakes to dense rainforests. Magnetic Island, off the coast of Townsville, is known for its koalas and rock wallabies, while the Whitsunday Islands, part of the Great Barrier Reef Marine Park, offer iconic beaches and scenic flights.
Australia's islands also hold historical and cultural significance. Rottnest Island, located off the west coast near Perth, is home to the unique Quokka animal. Lord Howe Island, a small oceanic island in the Tasman Sea, is known for its remote location and natural wonders. Christmas Island, 1,800 kilometres northwest of mainland Australia, is famous for its large bird populations, including frigate birds and Christmas Island white-eyes.
The islands of Australia are vulnerable to environmental threats. The introduction of cats, rats, rabbits, and diseases has led to the extinction of bird species on smaller islands. Human activities, such as seal hunting on Macquarie Island, have also historically caused significant harm to the local wildlife. Despite these challenges, Australia's 8,222 islands remain a source of celebration and admiration for their natural beauty and ecological importance.
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The largest islands by population are those connected to the mainland by bridge
Australia has 8,222 islands within its maritime borders. The islands larger than 1,000 square kilometres include Tasmania, Melville Island, Kangaroo Island, Groote Eylandt, Bathurst Island, K'gari, Flinders Island, King Island, and Mornington Island.
Tasmania, with a population of 570,000, is the largest island state in Australia. The largest islands by population, apart from Tasmania, are those connected to major urban areas on the mainland by bridge. These include Bribie Island near Brisbane, with a population of 18,000, and Phillip Island near Melbourne, with a population of 14,000.
Bribie Island is located north of Brisbane, the capital of Queensland, and is connected to the mainland by the Bribie Island Bridge. The island is known for its beautiful beaches, calm waters, and scenic views. It offers a range of outdoor activities, including swimming, fishing, boating, and walking trails. The island also has a golf course, parks, and a vibrant community.
Phillip Island, situated about 140 kilometres southeast of Melbourne, is renowned for its stunning coastal scenery and abundant wildlife. The island is famous for its penguin parades, where visitors can observe the nightly ritual of little penguins returning to shore after a day of fishing. Phillip Island is also known for its surf beaches, such as Woolamai, and motor racing events at the Phillip Island Grand Prix Circuit. The island offers a variety of accommodation options and attractions, making it a popular tourist destination.
Both Bribie Island and Phillip Island provide easy access to the amenities and attractions of their nearby major cities, Brisbane and Melbourne, respectively, due to their bridge connections to the mainland. These bridges facilitate transportation and commuting, contributing to the islands' population growth and development.
In addition to their population size, these islands connected to the mainland by bridges offer a unique blend of natural beauty, recreational opportunities, and convenient access to urban conveniences. They showcase Australia's diverse and captivating island landscapes, attracting both locals and tourists alike.
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Tasmania is a large island state off the southeast coast of mainland Australia
The state of Tasmania comprises the main island of Tasmania, as well as around 334 surrounding smaller islands, including Bruny Island, King Island, Flinders Island, and Macquarie Island. The main island is roughly heart-shaped and has a population of around 570,000 people as of 2023, making it Australia's smallest and least populous state. The state capital and largest city is Hobart, situated along the Derwent River in the Southeast region. This region features a mix of coastal landscapes and rugged mountainous terrain, including the Tasman Peninsula, known for its towering sea cliffs and unique rock formations.
Tasmania has a diverse geography that can be divided into several distinct regions, including the West Coast, the Central Plateau, the Midlands, the East Coast, and the Southeast. The West Coast is particularly rugged and mountainous, with dense rainforests and steep terrain, while the Central Plateau is similar to the landscapes of northern Canada and Finland, studded with over 4,000 lakes. The Midlands, in the central-eastern part of the state, are flatter, and the Southwest National Park supports some of the Southern Hemisphere's remaining temperate rainforests.
Tasmania has a moist and equable climate, with mild to warm summers and mild winters in most settled areas, although the southwest experiences more rugged weather. The island state is known for its pristine wildlife, water, and air, making it a popular destination for ecotourism. Tasmania also has a growing reputation for its unique cuisine and award-winning beverages, including Tasmanian beer brands such as Boags and Cascade.
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Macquarie Island was nominated for inscription on the World Heritage Register for its unique geological features
Australia is a nation of islands, with 8,222 islands within its maritime borders. The islands vary in size, with the largest being Tasmania, at 64,519 square kilometres, and the smallest being tiny specks of land just over 1,000 square kilometres.
One of Australia's islands is Macquarie Island, a subantarctic island in the southwestern Pacific Ocean. Macquarie Island was nominated for inscription on the World Heritage Register in 1992, 1996, and 1997, and was finally inscribed as a UNESCO World Heritage Site in 1997.
Macquarie Island is an exposed portion of the Macquarie Ridge, raised where the Indo-Australian tectonic plate meets the Pacific plate. This unique geological feature is the only place on Earth where rocks from the Earth's mantle are exposed above sea level. These exposures include pillow basalts and other extrusive rocks. The island provides a unique opportunity to study oceanic crust formation and plate boundary dynamics.
The island is also significant for its ecology and natural beauty. It is home to vast congregations of wildlife, including penguins and seals, and its remote and windswept landscape of steep escarpments, lakes, and dramatic changes in vegetation. Macquarie Island is a site of major geoconservation significance and is considered one of the truly remarkable places on Earth.
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Lord Howe Island is a small oceanic island in the Tasman Sea
Australia is a country comprising 8,222 islands. One of these islands is Lord Howe Island, a small oceanic island in the Tasman Sea. It is an irregularly crescent-shaped volcanic remnant, situated 600 kilometres (370 miles) east of the Australian mainland. The island is part of the Australian state of New South Wales. It is about 10 kilometres (6.2 miles) long and between 0.3 and 2.0 kilometres (0.19 and 1.24 miles) wide, with an area of 14.55 square kilometres (3,600 acres).
Lord Howe Island is the highly eroded remains of a 7-million-year-old shield volcano, formed by volcanic eruptions that lasted for about 500,000 years. It is part of a chain of islands that lie on the western rim of an undersea shelf, the Lord Howe Rise. This continental ribbon extends from New Zealand to the west of New Caledonia and consists of continental rocks that separated from the Australian plate 60 to 80 million years ago. The shelf is part of Zealandia, a microcontinent nearly half the size of Australia that gradually submerged after breaking away from the Gondwanan supercontinent.
The island is named after Richard Howe, the 1st Earl Howe. It features a semi-enclosed sheltered coral reef lagoon along its west coast, with 28 small islets along its coast. Most of the population lives in the north, while the south is dominated by forested hills, rising to the island's highest point, Mount Gower, at 875 metres (2,871 feet). The island is well-wooded but has little arable land, with rare vegetation and birdlife.
UNESCO recognises the Lord Howe Island Group as a World Heritage Site of global natural significance. The Lord Howe Island Act 1981 established a "Permanent Park Preserve" covering about 70% of the island, and it was added to the Australian National Heritage List in 2007 and the New South Wales State Heritage Register in 1999. The surrounding waters are protected as the Lord Howe Island Marine Park.
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Frequently asked questions
Australia has 8,222 islands within its maritime borders.
Some of the islands that make up Australia include Tasmania, K'gari, Kangaroo Island, Groote Eylandt, Bathurst Island, Flinders Island, and King Island.
Tasmania is the largest island in Australia with a land area of 64,519 square kilometres (24,911 sq mi).
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