Lexi Webster
Australia is the smallest continent and a sovereign country in the Southern Hemisphere. It is unique in that it has no land borders with any other country. However, it does share maritime borders with several nations. These include Indonesia, East Timor, Papua New Guinea, the Solomon Islands, Vanuatu, New Caledonia, and New Zealand. Australia has a rich history, having been inhabited by Aboriginal Australians for at least 50,000 years. It was later claimed by the British in 1770 and established as a colony in 1788. Today, Australia maintains strong bilateral relations with its maritime neighbours, particularly in regards to sharing resources and foreign aid contributions.
| Characteristics | Values |
|---|---|
| Continent | Australia is the world's smallest continent |
| Country | Australia is a sovereign country |
| Hemisphere | Southern Hemisphere |
| Oceans | Indian Ocean, Pacific Ocean, Southern Ocean, Timor Sea, Arafura Sea, Coral Sea, Tasman Sea |
| Maritime Borders | Indonesia, East Timor, Papua New Guinea, Solomon Islands, New Caledonia, New Zealand |
| Capital | Canberra |
| Largest City | Sydney |
| Population | 27.1 million (2024) |
| Language | English, Aboriginal Australian languages, and immigrant community languages |
| States | New South Wales, Queensland, South Australia, Tasmania, Victoria, Western Australia |
| Territories | Ten federal territories, including three internal territories: Australian Capital Territory, Jervis Bay Territory, and Norfolk Island |
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What You'll Learn
Australia's closest neighbouring countries: Papua New Guinea and New Zealand
Australia is unique in that it is not bordered by any countries in the traditional sense, as it is the world's smallest continent and is surrounded by ocean. However, Australia does share maritime borders with several nations, including Papua New Guinea and New Zealand, which are Australia's closest neighbouring countries.
Papua New Guinea is a developing nation with a population of around 85% living and working in farming and agriculture. In 1975, Papua New Guinea became a sovereign state, having previously been administered by Australia. The two countries signed a treaty in 1978 that defined their maritime border, and they continue to enjoy a strong bilateral relationship, with Australia contributing significant quantities of foreign aid to Papua New Guinea. In 2022, Australia was PNG's biggest trade partner, with bilateral trade of over $5 billion. The two countries also share a rich history, with many Papua New Guineans assisting and fighting alongside Australian soldiers during World War II in the Kokoda Campaign, which holds special significance for the relationship between the two nations. In December 2023, the Prime Ministers of Australia and Papua New Guinea signed the Bilateral Security Agreement, a legally binding framework for deepening security cooperation between the two countries.
New Zealand is Australia's closest neighbouring country, located to the southeast. Australia and New Zealand share a British colonial heritage and have a close political and economic relationship, with deeply integrated economies and shared foreign policy interests. New Zealand is Australia's only formal defence ally, with the ANZUS Treaty of 1951 formalising the countries' commitments to each other as allies. The two countries also have a longstanding defence and security relationship, having fought alongside each other in the Boer War and both World Wars. New Zealand and Australian prime ministers hold annual formal talks called the Australia New Zealand Leadership Meeting (ANZLM) and collaborate on diverse foreign policy, security, and trade issues. The two countries also have a healthy sporting rivalry and work together on aid and development initiatives in the Pacific and Southeast Asia regions.
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Maritime borders and treaties
Australia does not share a land border with any other country in the traditional sense due to its unique geographical position. However, it does share maritime borders with several nations and has established maritime boundaries through various treaties.
Indonesia
Australia and Indonesia share a maritime border that has been defined by four signed treaties, one of which has not yet been ratified. The first two treaties caused discontent among Indonesians as the method used to determine the border's location had the potential to deny Indonesia oil reserves. The final treaty, signed in 1997, incorporated elements of both countries' arguments to determine the border's location.
Timor-Leste
Australia and Timor-Leste share a maritime border in the Timor Sea. A long-running dispute between the two countries was settled by the Maritime Boundary Treaty, signed in 2018 and brought into force in 2019. The treaty established permanent maritime boundaries and created a stable legal framework for the development of gas and oil resources in the region.
Papua New Guinea
In 1978, Australia and Papua New Guinea signed a treaty defining their maritime border, which came into force in 1985. This agreement addressed boundary challenges that affected the lives of the native people and included provisions for the sovereignty and maritime boundaries in the Torres Strait region.
Solomon Islands
Australia and the Solomon Islands share a maritime boundary that was established by a treaty signed in 1988 and came into effect the following year. The two countries enjoy strong bilateral relations, with Australia providing significant foreign aid to the Solomon Islands.
New Caledonia
A treaty between Australia and French-controlled New Caledonia, signed in 1982, came into effect in 1983. It defined the maritime boundary between the two countries and reflected their cordial relationship, with Australia investing heavily in New Caledonia and providing foreign aid.
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Australia's unique geographical position
Australia's geographical position is unique in that it is a continent and a sovereign country. It is the world's smallest continent and the sixth-largest country by land area. Australia is located in the Southern Hemisphere, bordering the Indian Ocean to the west and the Pacific and Southern Oceans to the south. The country consists of mainland Australia, the island of Tasmania, and many smaller islands.
Due to its isolated location, Australia is often referred to as an "island continent." It is separated from Maritime Southeast Asia and New Guinea by the Arafura Sea and the Torres Strait, from Island Melanesia by the Coral Sea, and from New Zealand by the Tasman Sea. The Timor Sea lies to the north and the Coral Sea to the northeast.
Australia has no land borders with any other countries. However, it shares maritime borders with several neighbouring countries. These include Indonesia, East Timor, Papua New Guinea, the Solomon Islands, Vanuatu, New Caledonia, and New Zealand. The relationships between Australia and these countries are generally cordial, with strong bilateral relations and foreign aid contributions.
The unique geographical position of Australia has resulted in a diverse range of natural environments and ecosystems. The country has a long mainland coastline of 32,994 kilometres and claims an exclusive economic zone of about 8,200,000 square kilometres. Australia's capital city is Canberra, and the largest city is Sydney. The country has a population of approximately 27.1 million people and is a member of the Commonwealth of Nations.
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The bordering seas of Australia
Australia is an island country that borders three oceans: the Indian Ocean, the Pacific Ocean, and the Southern Ocean. The bordering seas of Australia include the Arafura Sea to the north, the Coral Sea to the northeast, the Tasman Sea to the southeast, the Timor Sea to the northwest, and the Coral Sea to the northeast. The Indian Ocean borders the Northern Territory and Western Australia, while the Southern Ocean borders Western Australia, South Australia, and Victoria. New South Wales and Queensland border the Pacific Ocean, and Tasmania is located in the Southern Ocean.
The Offshore Constitutional Settlement Acts of 1980 provide guidelines for managing coastal waters, including resource use for fishing and mining. Australia's Territorial Seas extend 12 nautical miles from the coastline, and the country's sovereignty extends to this limit from the seabed to the airspace above. Australia's Contiguous Zones reach a maximum of 24 miles from the coastline.
Australia's Exclusive Economic Zone (EEZ) stretches 200 nautical miles from its coastline, and the country has sovereign rights to explore, exploit, conserve, and manage natural resources within this zone. The EEZ covers approximately 10 million square kilometers, including 8.2 million square kilometers off the mainland and remote territories and 2 million square kilometers off the Australian Antarctic Territory.
Maritime borders have been a source of conflict and the subject of treaties with neighboring countries. Australia has signed maritime border treaties with Indonesia, Timor-Leste, Papua New Guinea, the Solomon Islands, and New Zealand. These treaties address boundary challenges, the sharing of natural resources, and bilateral relations.
In summary, Australia's bordering seas and oceans play a crucial role in the country's ecosystem and provide resources for various industries. The country's unique geographical position as an island surrounded by oceans and seas influences its relationships with neighboring countries.
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Australia's bordering countries to the north: Indonesia, East Timor, and Papua New Guinea
Australia is the smallest continent and a sovereign country in the Southern Hemisphere. It borders the Indian and Pacific Oceans. The Commonwealth of Australia includes the Australian mainland, the island of Tasmania, other nearby islands, and various external territories.
Australia's neighbouring countries to the north are Indonesia, East Timor, and Papua New Guinea. Australia and Indonesia share a maritime border defined by four signed treaties, one of which is yet to be ratified. The two countries previously disputed control of the area, with Indonesians discontent with the potential denial of access to oil reserves. The final treaty, signed in 1997, incorporated elements of both countries' arguments.
East Timor, officially known as Timor-Leste, gained independence in 2002 and occupies the eastern section of Timor Island, with the western half under Indonesian control. In 2018, Australia and East Timor established a permanent maritime border through a treaty, resolving disputes over sharing oil and gas resources in the region.
Papua New Guinea, located north of Australia, was once administered by the Australian federal government as a de facto or de jure external territory from 1902 to 1975. In 1975, Papua New Guinea became a sovereign state, and in 1978, the two countries signed a treaty defining their maritime border. This agreement is notable for addressing boundary challenges impacting the native people of both nations.
It is worth noting that Australia does not share any land borders with other countries due to its unique geographical position.
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Frequently asked questions
No, Australia does not share a land border with any country due to its unique geographical position.
Australia's closest neighbouring countries are Papua New Guinea and New Zealand.
Australia has 8 neighbouring countries: Indonesia, East Timor, Papua New Guinea, the Solomon Islands, Vanuatu, New Caledonia, Malaysia, and the Philippines.
Yes, Australia has maritime borders with East Timor, Indonesia, New Zealand, Papua New Guinea, the Solomon Islands, and New Caledonia.
