Chagos Archipelago
Islands Remote Indian Ocean atolls including military base Diego Garcia
The Chagos Archipelago comprises remote Indian Ocean atolls centered on Diego Garcia; its coral reefs and seabird colonies attract scientific expeditions and limited diving, but access is tightly controlled.
The Chagos Archipelago is a remote group of coral atolls and islands in the central Indian Ocean, administered as the British Indian Ocean Territory. It contains more than 60 islands and extensive coral reef and lagoon systems, and is notable for its marine biodiversity.
Key features include the large atoll of Diego Garcia, which hosts a long-standing UK/US military facility and is off-limits to civilian visitors, and several northern atolls with important seabird and reef habitats. The islands are largely uninhabited except for personnel associated with the base and conservation management.
In the mid-20th century the island population known as the Chagossians was removed from several islands in connection with establishment of the military facility; since then the territory has been subject to legal and political disputes over sovereignty and resettlement. Conservation efforts and legal processes continue to affect access and management.
The archipelago lies in the central Indian Ocean well south of the Maldives and north of the Crozet/Prince Edward island chains, forming a wide arc of atolls and reef systems in open tropical ocean.
- Island count: the archipelago comprises more than 60 islands and atolls across a large area of the central Indian Ocean.
- Access: civilian access is highly restricted in much of the archipelago; Diego Garcia is a military facility with no public tourism.
What to See #
- Diego Garcia: The largest atoll in the archipelago and the location of the UK/US joint military facility on Diego Garcia; civilian access is restricted and the island is largely occupied by the base.
- Peros Banhos Atoll: A group of northern atolls with rich lagoon systems and important marine and bird habitats; these atolls include several uninhabited islets and are noted for their biodiversity.
- Salomon Islands (Chagos): A central chain of atolls and islets featuring coral reefs, seabird colonies and tropical lagoon systems that form the bulk of the archipelago's natural areas.
How to Get to Chagos Archipelago #
The Chagos Archipelago (British Indian Ocean Territory) is remote and access is highly restricted. Diego Garcia hosts a military base and public visits are generally not permitted; travel is typically only by military or specially authorized vessels/aircraft with prior permission.
Tips for Visiting Chagos Archipelago #
- Access to the Chagos Archipelago is highly restricted: Diego Garcia is a UK‑administered military base with no civilian access, and visits to many atolls require permits from the British Indian Ocean Territory administration.
- If you're seeking to see Chagos's reefs or birdlife, only join scientifically sanctioned or officially approved expeditions-unauthorized tourist landings are not permitted in the protected marine reserve.
- Treat the archipelago as a remote, protected ecosystem: the area is managed as a marine protected area with strict controls, so plan travel only through recognized programs and with the necessary clearances.
Best Time to Visit Chagos Archipelago #
Access is restricted (no permanent civilian population); if you have permission to visit, the drier months (May-October) are typically best for diving and calmer seas.
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