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Australia: Background and U.S. Relations

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Updated July 29, 2024

Australia: Background and U.S. Relations

Overview

Australia’s relationship with the United States, forged as allies in all major U.S. wars, remains closeAustralia: Background and U.S. Relations

Updated April 10, 2026 (IF10491)

Overview

The Commonwealth of Australia is a close ally and partner of the United States, and the relationship is underpinned by the 1951 Australia-New Zealand-United States (ANZUS) Treaty. The two countries enjoy close trade, political, cultural, intelligence, and defense relations, and maintain close people-to-people ties. As geopolitical uncertaintycompetition in the Indo-Pacific has increased, the alliance has deepened. Driven by over shared concerns about the People’military and economic rise of the People's Republic of China’s (PRC’s or China’s) military and economic rise or China). In September 2021, the governments of Australia, the United Kingdom (UK), and the United States launched the “AUKUS” partnership in September 2021. AUKUS"AUKUS" security partnership, which is intended to provide Australia with nuclear propulsion technology for its next generation submarines and to jointly develop advanced military capabilities. Congressional approval and involvement is required throughout AUKUS implementation. Australia and the United States have embracedalso coordinate through the Quadrilateral Security Dialogue (or "Quad," with Japan and India).

Australia is the world's sixth-largest country by surface area (2.96 million sq. miles). Originally inhabited by Aboriginal and Torres Strait Islander peoples, the modern Australian state developed from a British penal colony established in 1788. In 1901, Australia was granted sovereignty over its domestic affairs; in 1942, it adopted the 1931 Statute of Westminster, claiming legal independence from the UK and full control over its foreign relations. Australia is a member of the Commonwealth of Nations, an association of former British territories, and retains the King of the United Kingdom as its head of state.

Figure 1. Australia Fact Sheet

Politics and Governance

Australia has a bicameral legislature and holds elections at least once every three years, with snap elections possible. The most recent general election was held in April 2025.The incumbent Labor Party Prime Minister Anthony Albanese won reelection while the Liberal Party opposition candidate lost his seat in parliament. The Labor Party and the Liberal-National Parties Coalition are the country's two main political forces. The Green Party of Australia has been an influential political force at times.

Economics and Trade

The Australia-United States Free Trade Agreement (AUSFTA) came into force in 2005. Under AUSFTA, the two countries provide reciprocal duty-free access to a broad range of exports. The United States is Australia's second-largest trading partner in goods and services. The United States also is Australia's largest source of foreign direct investment. Data from the U.S. Trade Representative reveals that total U.S. goods and services trade with Australia was $62.8 billion in 2025.

In April 2025, the Trump Administration announced that imports from Australia would face a baseline 10% tariff with some exceptions, under the International Emergency Economic Powers Act (IEEPA). After the Supreme Court ruled against the use of IEEPA to impose tariffs in February 2026, President Trump imposed a 10% global tariff for 150 days under Section 122 of the Trade Act of 1974. The Trump Administration also has imposed 50% global tariffs on steel and aluminum imports under Section 232 of the Trade Expansion Act of 1962, but has not provided Australia with a tariff exemption as it did during the President's first administration.

Strategic Outlook

The Australian government's assessment of its security environment has shifted considerably in the past decade. In the mid-2010s, Australia's security community perceived few imminent or proximate threats to its national security. In 2024, Australia's inaugural National Defence Strategy (NDS) noted the commonwealth faced its most challenging strategic environment since World War II.

In part, this assessment is motivated by concerns related to U.S.-China competition, China's military modernization, a lack of perceived transparency in China's military build-up, and China's activities in Australia's near neighborhood (particularly the Pacific Islands). While Australian officials have not labeled China a military threat, the NDS states that China has employed coercive tactics in pursuit of its strategic objectives, including to alter the regional balance of power in its favor. The NDS asserted Australia "must work even more closely with the U.S., our closest ally and principal strategic partner."

To adjust to this changed strategic environment, Australia is pursuing updates to its force structure and defense spending practices. The government has laid out plans to expand its military capabilities and increase defense spending, including by allocating an additional AU$50.3 billion to defense spending through 2034. Australia also is expanding its diplomatic and security partnerships with countries in the Indo-Pacific, especially the Pacific Island Countries.

Ties with the United States

The U.S. government describes U.S.-Australia defense ties as "exceptionally close." U.S. armed forces have a rotational military presence in Australia, including at the northern port city of Darwin, and the United States has invested in defense infrastructure at northern Australian sites under the U.S. Force Posture Initiative. Australia partners with the United States through the "Five Eyes" intelligence-sharing arrangement, which also includes Canada, New Zealand, and the UK. The defense relationship has included bilateral and multilateral military exercises such as the Talisman Sabre, Rim of the Pacific (RIMPAC), and Malabar exercises.

The annual Australia-U.S. Ministerial (AUSMIN) consultations are central to the bilateral relationship. The 2025 AUSMIN Joint Statement emphasized "shared challenges" and the need to "uphold an open and stable international order." Observers have interpreted this language as referencing shared concerns about economic and military competition with China.

Critical Minerals. Australia has joined the United States on several initiatives aimed at securing critical mineral supply chains, while also investing in its own production and refining capabilities, which some analysts argue could become an alternative to PRC-dominated supply chains. In 2023, the allies committed to enhanced mineral cooperation under a Climate, Critical Minerals and Clean Energy Transformation Compact. As part of the compact, a Critical Minerals Taskforce pursues supply chain diversification and investment opportunities and addresses barriers to cooperation. At the Quad Foreign Ministers Meeting in July 2025, the grouping announced a new Quad Critical Minerals Partnership. During an October 2025 visit to the United States, Prime Minister Albanese and President Trump signed a Critical Minerals Framework Agreement that expects to see $3 billion worth of shared investments in critical mineral projects within six months of the signing as well as deepening defense and technological cooperation.

AUKUS. AUKUS Pillar 1 would allow Australia to purchase 3-5 U.S. Virginia-class nuclear-powered attack submarines (SSNs) in the 2030s as authorized in the 2024 National Defense Authorization Act (NDAA). The three AUKUS partners also plan to develop a new class of SSNs based on the UK'
with Japan and India), further aligning regional strategies.

History, Politics, and Governance Australia was first inhabited between 40,000 and 60,000 years ago. The Aboriginal population were hunter- gatherers; Aboriginal and Torres Strait Islander people now make up 3.8% of Australia’s population. Britain colonized Australia from 1788—when Britain established a penal colony there—to 1901. That year, Australia became the Commonwealth of Australia, a dominion of the British empire that was sovereign in its domestic affairs; Australia established control over its external affairs over the course of the next four decades. The United States recognized Australia’s independence and established bilateral relations in 1940. The country’s parliament is bicameral, with a House of Representatives and a Senate. Elections occur at least once every three years, but the government can call early elections. The Labor Party and the Liberal-National Party Coalition are the country’s two main political forces.

Prime Minister Albanese of the Labor Party has stated his intention to hold a referendum on Australia becoming an independent republic and removing the British King as Head of State, but has not committed to a timeframe. In October 2023, a referendum on a proposed constitutional amendment that would have created an Aboriginal and Torres Strait Islander body to advise parliament failed with a vote of 60% to 40%. Supporters saw the amendment as a way to increase Indigenous representation in policymaking, while opponents claimed the legislation would divide the population and hinder decisionmaking.

Economics and Trade The Australia-United States Free Trade Agreement (AUSFTA) came into force in 2005. The U.S. goods trade surplus with Australia was $17.7 billion in 2023, a 23.2% increase from 2022. The United States is Australia’s largest foreign investment destination. Top Australian exports and

services include raw materials, energy, agriculture, and tourism. Australia is among the world’s top exporters of energy and resources, including lithium, cobalt, and other critical minerals. China is Australia’s largest two-way trade partner and accounted for 26.8% of Australia’s global trade in 2023. Although the two countries signed a Free Trade Agreement in 2015, China restricted some imports from Australia in 2020 following Canberra’s endorsement of an inquiry into the origins of the COVID-19 disease. China began lifting those trade restrictions in 2023 and Australian goods and services exports to China in 2023 increased by more than 18% compared to 2022.

Source: The World Bank

Strategic Outlook The Australian government’s assessment of its security environment has shifted considerably in the past decade, from a relatively more benign one in the mid-2010s to a markedly deteriorated one in 2023. The primary driver of this shift was the emergence of great-power competition between the United States and China, as well as multiple instances of alleged PRC interference in Australian politics since 2017. A 2024 Lowy Institute poll found that more than 70% of Australians think China is somewhat or very likely to become a major military threat in the next 20 years, up from 45% of Australians in 2018.

The Australian government is reorienting elements of its military strategy, force structure, and procurement practices. It has laid out plans to increase defense spending and grow its military capabilities, and allocated $US37.5 billion for FY2025, 2.02% of its GDP. Australia plans an additional $33.8 billion in defense spending over the decade until 2033-2034. Australian governments also have responded to China’s outreach to the Pacific with renewed diplomatic engagement in the region.

Australia: Background and U.S. Relations

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Australia’s government has taken measures to guard against PRC influence in Australian politics and society. In 2018, the Australian parliament passed laws on espionage, foreign interference, and foreign influence, and the government blocked China’s Huawei from participating in Australia’s development of its 5G mobile network. In July 2024, Australia joined the United States, Canada, Germany, Japan, New Zealand, and the UK in issuing a joint-advisory about a PRC-sponsored cyber group targeting government and private sector networks.

Figure 1. Australia

Source: Map prepared by Amber Wilhelm, CRS.

Ties with the United States and Other Partners Australia has been a U.S. treaty ally since the 1951 Australia-New Zealand-United States (ANZUS) Treaty. Australia sent troops to support the Allies in the First and Second World Wars, and in the conflicts in Korea, Vietnam, Iraq, and Afghanistan. Australia also partners closely with the United States through the “Five Eyes” intelligence-sharing arrangement, which also includes Canada, New Zealand, and the UK. U.S. armed forces operate on a rotational basis from several Australian military bases. The defense relationship includes bilateral and multilateral military exercises such as the Talisman Sabre, RIMPAC, and Malabar exercises. A 2024 poll found 83% of Australians see the U.S.-Australia relationship as “very important” or “fairly important” to Australia’s security. The annual Australia-U.S. Ministerial (AUSMIN) consultations are central to the bilateral relationship. The 2023 AUSMIN Joint Statement emphasized “shared challenges” and the need to “uphold an open and stable international order,” language observers interpret as referencing shared concerns about economic and military competition with China. Since Russia’s 2022 invasion of Ukraine, Australia has provided over $1 billion in military aid to Ukraine and has participated—with Japan, New Zealand, and South Korea—in the annual NATO summit.

AUKUS. AUKUS Pillar 1 allows for Australia to purchase 3-5 U.S. Virginia-class nuclear-powered attack submarines (SSNs) in the 2030s as authorized in the 2024 National Defense Authorization Act (NDAA). Simultaneously, the three countries plan to develop a new class of SSN AUKUS boats based on the UK’s next-generation design that incorporates technology from all three countries, including

cutting s next-generation design that incorporates technology from all three countries, including cutting-edge U.S. submarine technologies. Pillar 2 focuses on joint development of advanced military capabilities in technological areas such as—including AI, cyber, hypersonic and counter-hypersonic, electronic warfare, and quantum technologies, and functional areas such as innovation and information sharing. Some observers describe AUKUS as the most significant security arrangement among the three nations in a generation; others question the costs, benefits, and potential barriers to implementing Pillar 1 in particular.

Japan and the Reciprocal Access Agreement (RAA). Australia has upgraded its strategic relationship with Japan in the past 15 years. In January 2022, the two countries signed a Reciprocal Access Agreement that establishes procedures for visiting forces from each other’s militaries, allowing for closer cooperation and joint exercises. Although not as formalized as the U.S.-Japan or U.S.- Australia alliances, the agreement allows for enhanced trilateral cooperation. Japan and Australia also hold regular “2+2” meetings of their foreign and defense ministers.

The Quad. Australia has bolstered relations with like- minded democracies through the Quadrilateral Security Dialogue. In their first-ever joint meeting in 2021, the leaders of the four countries issued a statement recommitting to “promoting the free, open, rules-based order, rooted in international law and undaunted by coercion, to bolster security and prosperity in the Indo- Pacific and beyond.” Initially, they focused on COVID-19, global health, infrastructure initiatives in the region, climate change, people-to-people exchanges and education, critical and emerging technologies, cybersecurity, and space. The most recent Quad Summit met in Japan in May 2023.

Climate Change PM Albanese’s government has prioritized intensifying efforts to combat climate change. In 2022, parliament passed into law a climate change bill—championed by Albanese and the Labor Party—that pledged to reduce carbon emissions by 43% below 2005 levels by 2030, with a goal of net zero by 2050. (The United States has set a target of 50%-52% reductions over 2005 levels by 2030.) In July 2024, Australia’s government introduced the Future Made in Australia Bill, which aims to strengthen the country’s economy during its energy transition. The bill contains the National Interest Framework, which if passed would focus on increasing private sector investment in industries including renewable hydrogen, critical minerals processing, green metals, low carbon liquid fuels, and clean energy manufacturing. Projections suggest Australia will continue to experience rising temperatures, more frequent floods, coral bleaching, ocean acidification, droughts, and bushfires due to climate change. Australia has one of the world’s highest levels of greenhouse gas emissions per capita, and was the world’s third-largest exporter of fossil fuels in 2022.

Payne Fellow Trey Spadone contributed to this In Focus.

Caitlin Campbell, Analyst in Asian Affairs Colin Willett, Section Research Manager

IF10491

Australia: Background and U.S. Relations

https://crsreports.congress.gov | IF10491 · VERSION 11 · UPDATED

Disclaimer

This document was prepared by the Congressional Research Service (CRS). CRS serves as nonpartisan shared staff to congressional committees and Members of Congress. It operates solely at the behest of and under the direction of Congress. Information in a CRS Report should not be relied upon for purposes other than public understanding of information that has been provided by CRS to Members of Congress in connection with CRS’s institutional role. CRS Reports, as a work of the United States Government, are not subject to copyright protection in the United States. Any CRS Report may be reproduced and distributed in its entirety without permission from CRS. However, as a CRS Report may include copyrighted images or material from a third party, you may need to obtain the permission of the copyright holder if you wish to copy or otherwise use copyrighted material.

In 2025, the U.S. Department of Defense conducted a review of AUKUS; President Trump stated the initiative is "full steam ahead."

The Quad. Australia has bolstered relations with the United States, Japan, and India through the Quadrilateral Security Dialogue. During the 2025 Quad Foreign Ministers' Meeting, the partners welcomed recent and upcoming activities that advance a free and open Indo-Pacific, including initiatives regarding maritime security, digital infrastructure, emerging technology, and humanitarian assistance.

Australia-China Relations

China is Australia's largest two-way trade partner, and the two countries signed a free trade agreement in 2015. China restricted some imports from Australia in 2020 following Canberra's endorsement of an inquiry into the origins of the COVID-19 disease.

Australia's government has taken several measures to guard against PRC influence in Australian politics and society following instances of PRC organizations attempting to co-opt domestic groups and individuals towards China's strategic interests. In 2018, the Australian parliament passed laws on espionage, foreign interference, and foreign influence, and the government blocked China's Huawei from participating in Australia's development of its 5G mobile network. In July 2024, Australia joined the United States, Canada, Germany, Japan, New Zealand, and the UK in issuing a joint-advisory about a PRC-sponsored cyber group targeting government and private sector networks.

In 2025, Albanese pledged during his re-election campaign to bring the Darwin Port back under Australian ownership (it was leased to a PRC-based company for 99 years in 2015). Many Australians express concern that the arrangement carries national security risks for Australia. China's ambassador to Australia has insinuated that a forced sale of the lease to an Australian company could result in investment and trade repercussions.

Considerations for Congress

U.S.-Australian bilateral relations continue to be a source of interest for some Members concerned with U.S.-Indo-Pacific defense and foreign policy goals. In the 119th Congress, Members may wish to consider several areas for Congressional oversight, legislation, or appropriations, such as progress towards AUKUS Pillar 1 and Pillar 2 objectives, the U.S.-Australia Critical Minerals Framework and supply chain resilience, and defense cooperation.

Congress also may weigh in on specific trade issues by setting trade priorities for the United States with Australia. For example, some Members of Congress have shared Trump Administration concerns over some trade barriers and reciprocity in trade relations, while others have sought to limit the President's authority to impose tariffs on allies or free trade agreement partners. (For more information, see CRS Report R48875, U.S.-Australia Relations: Background and Issues for Congress, by Jared G. Tupuola).