MAURITIUS · GEOPOLITICS
Key Facts
- The country An Indian Ocean island republic of about 1.24 million people with a US$16.2 billion economy in 2025 (as of October 2026).
- Why it matters It claims the Chagos Archipelago, home of the joint UK-US base on Diego Garcia, and sits on busy Indian Ocean shipping routes.
- The Chagos treaty Signed on 22 May 2025 for 99 years of UK control of the base, but not ratified and unpaid as of October 2026.
- The partners India, China, the UAE, the EU, the UK and the US each hold a different part of its trade and security web.
- What it means for you US duty-free access for African exporters runs to 31 December 2028, and the US travel advisory is Level 2 for crime.
- Still open Whether the UK can ratify without clear US support, and what legal action Mauritius might take.
Mauritius is a small Indian Ocean democracy of about 1.24 million people that trades with all the major powers, and its biggest geopolitical card is the Chagos Archipelago, home to the joint UK-US military base on Diego Garcia. As of October 2026 a treaty to hand the archipelago’s sovereignty to Mauritius is signed but not ratified, and UK ministers say the deal cannot go ahead without US support.
In Plain English
The Chagos Archipelago is a group of 58 small islands in the middle of the Indian Ocean that the UK administers as the British Indian Ocean Territory. Diego Garcia is its largest island and the site of a base used by the UK and the US.
Ratification is the formal approval a country gives to a signed treaty, after which it takes legal effect. Until both sides ratify, a treaty such as the Chagos agreement does not change who owns the islands.
Where Mauritius Sits on the Map
Mauritius lies in the western Indian Ocean, east of Madagascar, and its Prime Minister told parliament on 27 October 2026 that the country occupies a strategic position and has a vast exclusive economic zone. That zone is the stretch of sea around the islands over which a state controls fishing, seabed resources and patrols.
The World Bank puts the 2025 economy at about US$16.2 billion, as of October 2026. The International Monetary Fund (IMF), the global lender, projects public debt near 88% of output for 2026.
Trade equals about 119% of output, a figure the foreign ministry’s trade portal takes from the World Bank, so events abroad matter more to Mauritius than to most countries. The island imports far more than it exports and earns part of the gap back from services such as tourism.
For a wider portrait of the island, see the Rio Times guides Mauritius Explained 2026 and Mauritius in the Indian Ocean. This page covers only the foreign relationships that shape the state of play as of October 2026.
The Chagos Treaty and Diego Garcia
The Chagos Archipelago has 58 islands, a land area of about 60 square kilometres and 640,000 square kilometres of surrounding ocean, according to the UK government. Diego Garcia, the largest and most southerly island, makes up more than half of the land.
In 1966 the UK agreed with the US to make the territory available for the defence purposes of both countries, and the US presence on Diego Garcia is governed by a series of exchanges of notes. The UK has said the territory has been under continuous British sovereignty since 1814, a claim Mauritius has contested for decades.
The International Court of Justice (ICJ), the UN’s main court, advised on 25 February 2019 that the decolonisation of Mauritius was not lawfully completed and that the UK should end its administration of the archipelago as rapidly as possible. On 22 May 2019 the UN General Assembly adopted a resolution on the territory, tabled by Senegal on behalf of the African States, by 116 votes to 6 with 56 abstentions, and the UK voted against it.
The UK and Mauritius signed a treaty on 22 May 2025 under which Mauritius would hold sovereignty while the UK keeps full operational control of Diego Garcia for 99 years. The UK government says the deal also sets a 24 nautical mile buffer zone around the base and bans foreign security forces from the outer islands.
UK ministers put the cost at just over £100 million (US$133 million) a year at current prices, converted at the US Treasury reporting rate of £0.752 per US$ on 30 September 2026. Their written answers of October 2026 say no payment has been made and none will be made until a treaty is ratified and enters into force.
The bill meant to give the treaty force in UK law cleared its third reading in the Commons on 20 October 2025 and in the Lords on 12 January 2026. UK Parliament’s record for the bill now states that the 2024 to 2026 session has ended and that the bill “will make no further progress”.
In written answers dated 19 and 27 October 2026 UK ministers said the deal cannot go ahead without US support and that the government is working with the US and Mauritius on a way forward. A question put to UK ministers on 19 October 2026 refers to a statement by the Prime Minister of Mauritius that Mauritius is prepared to take legal action unless the deadlock is resolved.
On 23 March 2026 the Mauritian foreign ministry said missiles had been launched towards the Chagos Archipelago between the night of 19 March and the morning of 20 March 2026, and called it a grave violation of international law. The statement did not say who fired them, and it praised diplomatic efforts by the Gulf Cooperation Council, the regional bloc of the Gulf states.
India and the Maritime Security Ties
India was the third-largest source of Mauritian imports in 2023, at 10.2%, and the two countries have a Comprehensive Economic Cooperation and Partnership Agreement that entered into force on 1 April 2021. The foreign ministry’s trade portal calls it the first trade agreement India signed with an African country.
Mauritian exporters get preferential access to India for 615 products, and Mauritius grants preferential access on 310 Indian products. The portal’s examples include 40,000 tons of special sugar at a 10% duty and 7.5 million pieces of garments at zero duty.
On 27 October 2026 the Prime Minister told parliament that an offshore patrol vessel bought under an Indian line of credit is expected by the end of 2028 and that four light utility helicopters are expected from India from 2029. He added that Mauritius has an ongoing collaboration with India, France and the US on surveillance patrols of its exclusive economic zone, and that some 400 police officers have been trained since 2025.
The UK government said on 22 May 2025 that the US, Canada, Australia, New Zealand and India all backed the Chagos agreement. India also sits with Mauritius in the Indian Ocean Rim Association, a group of coastal states that was launched in Mauritius on 6 and 7 March 1997.
China, the Gulf and Turkey in the Trade Web
China was the largest source of Mauritian imports in 2023, at 15.8%, and the Mauritius-China free trade agreement entered into force on 1 January 2021. On that date Mauritius gained duty-free access to the Chinese market on 7,504 tariff lines, and 723 more lines are being phased out over five to seven years.
A customs notice carried on the foreign ministry’s portal says Mauritian goods get zero-tariff treatment in China for two years, until the end of April 2028. In the documents read for this page, China appears as a trade partner and not as a security partner, as of October 2026.
The United Arab Emirates was the second-largest import source in 2023, at 11.1%, and a comprehensive economic partnership agreement with Mauritius entered into force on 1 April 2025. Under the UAE’s tariff schedule, Mauritian exporters gained immediate preferential access on some 6,700 products.
In a statement of 3 March 2026 on the Middle East conflict, the Mauritian foreign ministry thanked the authorities of the UAE and Saudi Arabia for the spontaneous support given to stranded Mauritian nationals in the Gulf. A statement of 14 March 2026 called for an end to hostilities and said that safe airspace and freedom of navigation are essential for development.
Turkey has a free trade agreement with Mauritius that entered into force on 1 June 2013 and gives Mauritian exporters duty-free and quota-free access for all industrial products. It is a smaller thread in the web, but it shows how Mauritius collects trade deals with partners on several continents.
Europe, the UK and the Financial Centre
In 2023 South Africa took 12.7% of Mauritian exports, the UK 12.4%, France 10.9% and the US 10.8%, according to the foreign ministry’s trade portal. Those four markets set the commercial weight of the West and of the region in the island’s foreign policy.
The European Union and four Eastern and Southern Africa states, the Comoros, Madagascar, Mauritius and Seychelles, announced in Mauritius on 10 June 2026 that negotiations on a deepened economic partnership agreement had concluded. Both sides called it the first free trade agreement of its kind between the EU and Sub-Saharan African partners, and signature and entry into force are still to come.
The UK and Mauritius signed a memorandum on an Enhanced Strategic Trade Partnership on 30 July 2026, covering areas such as the green and blue economy, healthcare, education and financial and professional services. It was signed by the Mauritian foreign minister, Dhananjay Ramful, and the British High Commissioner.
France is also a security neighbour through Réunion, the French island that belongs to the Indian Ocean Commission alongside the Comoros, Madagascar, Mauritius and Seychelles. The Prime Minister told parliament on 27 October 2026 that Mauritian police have asked French authorities, under a Mauritius-Réunion security contact group, to audit their crowd-control capabilities.
Mauritius is not on the European Commission’s list of high-risk third countries for money laundering and terrorist financing, whose latest amendments were published on 9 January 2026. The parliament’s website lists a Financial Crime Bill and an Asset Recovery and Unexplained Wealth Bill among its latest bills in October 2026, and the island’s finance story is told in Mauritius Financial Hub.
The United States and Indian Ocean Security
The US took 10.8% of Mauritian exports in 2023, and the two governments are linked by a Trade and Investment Framework Agreement, a standing forum for trade talks. The Mauritius-US relationship is therefore commercial first, with security cooperation focused on the sea.
Mauritius is among the 33 sub-Saharan countries designated for 2026 under the African Growth and Opportunity Act (AGOA), the US programme of duty-free access for eligible African goods. A law approved on 2 September 2026 extended AGOA to 31 December 2028.
The Prime Minister told parliament on 27 October 2026 that upgrades to the ship-tracking system in Mauritius and Rodrigues, an island territory of Mauritius, are being made in collaboration with the US and are expected by the end of November 2026. A Japanese-funded coastal radar system with seven stations, one of them in Rodrigues, was installed in September 2026.
The Prime Minister’s Office website lists the US-Africa Business Summit for 6 to 9 December 2026 at a convention centre in Mauritius. For the role Mauritius plays among African states, see Mauritius in Africa, Its Role, Weight and Alliances.
Africa and the Regional Clubs
Mauritius belongs to the Southern African Development Community, the Common Market for Eastern and Southern Africa (COMESA) and the Indian Ocean Commission, and its foreign ministry’s trade portal lists all three as trade frameworks. COMESA has 21 member states and more than 389 million people, according to the same portal.
The African Continental Free Trade Area agreement entered into force on 30 May 2019, and preferential trade under it began on 1 January 2021, the portal records. The 2019 Chagos resolution at the UN General Assembly was tabled by Senegal on behalf of the Africa Group, a sign that the claim had African backing.
Who Makes Foreign Policy in Port Louis
Prime Minister Navinchandra Ramgoolam also holds the defence, home affairs, external communications and finance portfolios and the portfolio for Rodrigues and the outer islands, according to the cabinet list printed in the parliamentary record of 27 October 2026. That concentration puts the main security and money decisions in one office.
Foreign Minister Dhananjay Ramful runs the ministry of foreign affairs, regional integration and international trade and is secretary general of the Mauritius Labour Party, the main party of the ruling Alliance du Changement coalition. His ministry’s biography says he was re-elected to parliament in November 2024 for a third consecutive term.
What It Means for US Readers
The US State Department rates Mauritius Level 2, Exercise Increased Caution, because of crime, mainly petty theft, in an advisory listed as reissued on 8 December 2025 and still current in October 2026. Mauritius is not among the countries named in Presidential Proclamation 10998, the entry-restriction order that took effect on 1 January 2026.
Exporters can use AGOA duty-free access for eligible goods until 31 December 2028, but they should check current US customs rules before each shipment because other tariff measures can change. Investors and policy readers should watch the Chagos deal, because the Diego Garcia base is a joint UK-US facility and UK ministers tie the treaty to US support.
What Is Not Known
No ratification date is public, and UK ministers said on 21 October 2026 that they will not give a running commentary on any forecast entry-into-force date. The current US government position on the treaty is not stated in the primary documents read for this page.
The Mauritian Prime Minister’s statement about possible legal action is known only through a question put to UK ministers, and the primary Mauritian text was not found. The origin of the missiles launched towards the Chagos Archipelago in March 2026 is not given in the Mauritian statement.
The foreign ministry’s list of communiqués carries an item titled “Communiqué on the Suspension of Diplomatic Relations between the Republic of Mauritius and the Republic of Maldives”, but its text could not be opened for this page. The date, the reasons and the current status of that suspension are therefore not stated here.
The documents read describe no Chinese base, port concession or security pact in Mauritius, so the scale of China’s role beyond trade is not documented here. Figures for trade shares are for 2023, the latest year on the foreign ministry’s portal.
Frequently Asked Questions
Who controls the Chagos Islands in October 2026?
The UK still administers them as the British Indian Ocean Territory because the treaty signed on 22 May 2025 has not been ratified. UK ministers say no payment will be made until it enters into force.
What does the Chagos treaty give each side?
Mauritius would hold sovereignty over the archipelago, and the UK would keep full operational control of Diego Garcia for 99 years. The UK government says the deal adds a 24 nautical mile buffer zone and bans foreign security forces on the outer islands.
Which countries does Mauritius trade with most?
In 2023, the latest year on the foreign ministry’s portal, China, the UAE and India were its top three import sources. South Africa, the UK, France and the US were its leading export markets.
Is Mauritius covered by AGOA?
Yes, Mauritius is on the 33-country list for 2026, and a law approved on 2 September 2026 extends AGOA to 31 December 2028. AGOA gives eligible African goods duty-free access to the US market.
What is the US travel advisory for Mauritius?
The State Department lists Level 2, Exercise Increased Caution, because of crime, mainly petty theft. The advisory was reissued on 8 December 2025 and was still listed in October 2026.
Is Mauritius getting a new trade deal with the EU?
Negotiations on a deepened EU agreement with Mauritius, the Comoros, Madagascar and Seychelles were announced as concluded in Mauritius on 10 June 2026. Signature and entry into force are still to come.
Sources: UK Parliament, Diego Garcia Military Base and British Indian Ocean Territory Bill record; UK written answer of 27 October 2026 on Chagos sovereignty; UK written answer of 21 October 2026 on the cost of the treaty; UK government, treaty announcement, 22 May 2025; UK government, British Indian Ocean Territory page; International Court of Justice, advisory opinion of 25 February 2019; Mauritius National Assembly, Hansard of 27 October 2026; Mauritius foreign ministry, press statements of 3, 14 and 23 March 2026; Mauritius foreign ministry trade portal, trade agreements and trade profile; World Bank, GDP and population indicators for Mauritius, 2025; IMF World Economic Outlook database, general government debt, read 30 October 2026; United Nations, General Assembly press release GA/12146, 2019; US Treasury reporting rates, 30 September 2026; US Public Law 119-103, approved 2 September 2026; USTR AGOA eligibility notice, 30 June 2026; US State Department travel advisory feed; Presidential Proclamation 10998, 16 December 2025; European Commission, high-risk third countries list; Mauritius Prime Minister’s Office website; Rio Times hub: Africa.
This article was produced by The Rio Times’ automated newsroom system. How we use AI · Report an error · Editorial responsibility: Matthias Camenzind, Editor-in-Chief
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