British Indian Ocean Territory
Demographics

The British Indian Ocean Territory (Constitution) Order 2004 states that "no person has the right of abode" in the territory as it "was constituted and is set aside to be available for the defence purposes of the Government of the United Kingdom and the Government of the United States of America ", and accordingly, "no person is entitled to enter or be present in the Territory except as authorised" by its laws.

As there is no permanent population, or census, information on the demographics of the territory is limited; the size of the population is related to its offensive requirements. Diego Garcia, with a land area of 27 square kilometres (10 square miles), is the only inhabited island in the territory, and therefore has an estimated average population density of around 110 persons per km.Diego Garcia's population is normally limited to official visitors and military-essential personnel only, and family members are not authorised to travel to Diego Garcia (the island therefore has no schools). Personnel may not travel to the island for leave, but they may transit through Diego Garcia to connect with follow-on flights. The population in 1995 was estimated to be approximately 3,300; i.e. 1,700 UK and US military personnel and 1,500 civilian contractors. The total population was reportedly 4,000 persons in 2006, of whom 2,200 were US military personnel or contractors, 1,400 were Overseas Filipino Worker contract staff, 300 were Mauritian contract staff, and 100 were members of the British Armed Forces. The population had decreased to around 3,000 persons in 2018. United Nations population statistics indicate that island's population is comparable to that of the Falkland Islands. The remainder of the archipelago is ordinarily uninhabited.
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