
Australia is a country that straddles both the Indian and Pacific Oceans. It has the largest coastline along the Indian Ocean and sees itself as a two-ocean power. Australia has an interest in the Indian Ocean region, which is a trading hub and economic highway spanning Africa, the Middle East, South Asia, and Southeast Asia. Australia has strengthened its engagement in the region by establishing diplomatic relations and participating in conferences and organisations such as the Indian Ocean Rim Association. The country's approach to the Indian Ocean is shaped by its resources, defence strategy, and geopolitical interests.
| Characteristics | Values |
|---|---|
| Is Australia in the Indian Ocean? | No, Australia is not in the Indian Ocean. It is located in the Southern Hemisphere, in the region of Oceania. Australia is surrounded by the Indian Ocean, the Pacific Ocean, and the Southern Ocean. |
| Bodies of water surrounding Australia | Indian Ocean, Pacific Ocean, Southern Ocean, Timor Sea, Arafura Sea, Gulf of Carpentaria, Coral Sea, Tasman Sea |
| Nearest countries to Australia in the Indian Ocean | Indonesia, Timor-Leste, Christmas Island |
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What You'll Learn
- Australia has the largest Indian Ocean coastline
- Australia has sovereignty over two island groups in the Indian Ocean
- Australia's relationship with India is central to its Indian Ocean strategy
- Australia hosted the Indian Ocean Conference in 2024
- Australia has redefined its immediate region to include the northeast Indian Ocean

Australia has the largest Indian Ocean coastline
Australia is an island nation in Oceania with a coastline that totals 25,760 km. The country shares its coastline with the Pacific Ocean, Indian Ocean, and Southern Oceans. Australia is one of the three countries with the longest shorelines in the Indian Ocean, the other two being Indonesia and India.
The Indian Ocean is the third-largest of the world's oceans, covering 70,560,000 km2 (27,240,000 sq mi), or 19.5% of the total ocean surface on Earth. Its northernmost extent (including marginal seas) is approximately 30°N in the Persian Gulf, and it is delimited from the Atlantic Ocean by the 20° east meridian, running south from Cape Agulhas, South Africa. The Indian Ocean is separated from the Pacific Ocean by the meridian of 146°49'E, which runs south from South East Cape on the island of Tasmania in Australia.
The Australian Indian Ocean Territories is an administrative unit consisting of two island groups in the Indian Ocean under Australian sovereignty: Christmas Island and Cocos Island. Each of these islands has its own shire council. The administrative unit does not have jurisdiction over the uninhabited Ashmore and Cartier Islands and Heard Island and McDonald Islands, despite these territories lying within the Indian Ocean.
The southwestern corner of Australia, stretching from Shark Bay to Israelite Bay, is a floristic region with a stable climate and one of the world's largest floral biodiversities. The Indian Ocean is the youngest of the major oceans, with active spreading ridges that are part of the worldwide system of mid-ocean ridges. These spreading ridges meet at the Rodrigues Triple Point, which separates the African plate, the Australian plate, and the Indian plate.
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Australia has sovereignty over two island groups in the Indian Ocean
The two island groups under Australian sovereignty are Christmas Island and the Cocos (Keeling) Islands. Christmas Island is known for its unique flora and fauna, breathtaking wilderness, and a fusion of Malay, Singaporean, Australian, and Chinese culture. It offers activities such as hiking, diving, snorkelling, fishing, and birdwatching. The Cocos (Keeling) Islands, on the other hand, provide a laid-back lifestyle with pristine beaches, crystal clear waters, and a small-town vibe. Visitors can enjoy snorkelling, diving, fishing, parasailing, and kite surfing during the trade wind season.
Christmas Island serves as the residence of the administrator of the Australian Indian Ocean Territories. The same officer also has jurisdiction over the Cocos (Keeling) Islands but does not reside there. Each of these islands has its own shire council: the Shire of Christmas Island and the Shire of Cocos.
It is important to note that the Australian Indian Ocean Territories do not include all islands within the Indian Ocean that are associated with Australia. For example, the uninhabited Ashmore and Cartier Islands, as well as Heard Island and McDonald Islands, are within the Indian Ocean but are not under the jurisdiction of this administrative unit.
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Australia's relationship with India is central to its Indian Ocean strategy
The Australia-India Comprehensive Strategic Partnership, announced in 2020, underpins their relationship, and their connections continue to grow and expand as both countries invest in their future. Australia has a range of initiatives to bolster its economic, science, cyber, people-to-people, and environmental ties with India. For instance, the Australia-India CEO Forum accelerates commercial engagement and partners with governments to improve investment conditions and the business environment. The two countries also have a shared research fund that strengthens their collaboration in strategic areas like critical minerals, critical technologies, and renewable energy technologies.
The security relationship between the two countries has also gained momentum. Australia has made considerable efforts to develop a comprehensive strategic relationship with India, and it recognizes its shared interests with India in promoting regional security and stability. Their strategic interests are becoming more convergent, with trade between the two countries growing, and along with it, shared strategic interests. Their perceptions of the strategic landscape, especially regarding the role of China, align more closely than ever before. Both countries share a common apprehension about China's rise, although for different reasons.
To counter China's influence, Australia should support India in retaining its predominant position in the Indian Ocean region and help it achieve its SAGAR (Security and Growth for All in the Region) vision, which would signal a greater commitment to an Indian-led Indian Ocean. Australia could take practical steps such as increasing Indian naval visits to its ports, increasing strategic dialogues focused on the Indian Ocean region, and creating information-sharing channels with security-oriented groups.
In conclusion, Australia's relationship with India is indeed central to its Indian Ocean strategy. Their shared interests in the region, coupled with growing trade and strategic convergence, have led to a strengthening of their security and economic ties. Australia recognizes the importance of supporting India's leadership in the Indian Ocean to counter China's influence and promote a peaceful and stable Indo-Pacific region.
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Australia hosted the Indian Ocean Conference in 2024
Australia is home to two island groups in the Indian Ocean: Christmas Island and the Cocos (Keeling) Islands. In addition, the uninhabited Ashmore and Cartier Islands and Heard Island and McDonald Islands, which are also in the Indian Ocean, fall within the jurisdiction of the Australian Indian Ocean Territories.
In recognition of its geographical location and its role in the region, Australia hosted the 7th Indian Ocean Conference (IOC) in 2024. The IOC is an annual international conference that focuses on the geopolitical, economic, and strategic importance of the Indian Ocean region. It brings together policymakers, scholars, business leaders, and civil society representatives to discuss issues related to security, trade, and cooperation in the Indian Ocean region. The first edition of the conference was held in Singapore in 2016, and it has since become the flagship consultative forum for countries in the region.
The 7th IOC was dominated by a US-China tussle, with warships from both countries in the Indian Ocean. The conference also addressed a range of interconnected illegal activities, such as threats to maritime traffic, piracy, and terrorism, as well as challenges to international law and concerns about freedom of navigation and the safeguarding of sovereignty.
The Indian Ocean is the world's third-largest ocean, covering an area of approximately 70.6 million square kilometres. The Security and Growth for All in the Region (SAGAR) policy, introduced by India in 2015, aims to enhance cooperation and mutual trust between India and its neighbouring countries, particularly in the Indian Ocean region. This policy has several components, including maritime security, sustainable development, and strengthening cultural ties.
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Australia has redefined its immediate region to include the northeast Indian Ocean
The Indian Ocean, serving as a trading hub and economic highway connecting Africa, the Middle East, South Asia, and Southeast Asia, is vital for open trade and energy security. Australia, with its substantial interests in oil flows from the Middle East, understands the importance of a stable and secure Indian Ocean region. By including the northeast Indian Ocean in its immediate region, Australia acknowledges the need to actively engage with and contribute to the region's security and prosperity.
This redefinition aligns with Australia's strengthening engagement with regional partners, such as hosting the Indian Ocean Conference in Perth in 2024 and establishing a High Commission in the Maldives. Additionally, Australia's burgeoning trading relationship with India, driven by shared concerns about China's activities in the South China Sea and Indian territory, further underscores the importance of the Indian Ocean region. Australia's 2024 National Defence Strategy underscores the centrality of the northeast Indian Ocean to its security and identifies India as a "top-tier security partner."
However, Australia's expanded definition of its immediate region has sparked debates among analysts. Some argue that Australia lacks the resources and capabilities to effectively project power off its northwest coast, particularly towards the northeast Indian Ocean. The northwest region of Australia, facing the northeast Indian Ocean, is sparsely populated and underdeveloped, limiting Australia's ability to establish shared economic and security interests with neighbouring countries. Nonetheless, Australia remains committed to enhancing its naval reach in the Indian Ocean, as evidenced by its pursuit of the AUKUS nuclear-powered submarine fleet.
In conclusion, Australia's redefinition of its immediate region to include the northeast Indian Ocean reflects the country's ambition to actively shape the geostrategic environment in this vital maritime space. While challenges and limitations exist, Australia seeks to strengthen its engagement with regional partners, foster shared security and economic interests, and contribute to a stable and prosperous Indian Ocean region. This expanded definition underscores Australia's recognition of the Indian Ocean's significance in the broader Indo-Pacific construct, solidifying its role as a key player in this dynamic region.
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Frequently asked questions
Australia borders the Indian Ocean, but it also borders the Pacific Ocean, and the Southern Ocean.
Australia has an interest in the Indian Ocean region operating according to international rules, norms, and standards. Australia has established a High Commission in the Maldives and a Consulate-General in Bengaluru. It also hosted the Indian Ocean Conference in Perth in 2024.
The Indian Ocean is a trading hub and economic highway spanning Africa, the Middle East, South Asia, and Southeast Asia.











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