World Facts Wiki
Home
Continents
Home
Continents
  • Africa

    • Africa
    • Algeria
    • Angola
    • Benin
    • Botswana
    • British Indian Ocean Territory
    • Burkina Faso
    • Burundi
    • Cameroon
    • Cape Verde
    • Central African Republic
    • Chad
    • Comoros
    • Congo
    • Djibouti
    • DR Congo
    • Egypt
    • Equatorial Guinea
    • Eritrea
    • Eswatini
    • Ethiopia
    • Gabon
    • Gambia
    • Ghana
    • Guinea
    • Guinea-Bissau
    • Ivory Coast
    • Kenya
    • Lesotho
    • Liberia
    • Libya
    • Madagascar
    • Malawi
    • Mali
    • Mauritania
    • Mauritius
    • Mayotte
    • Morocco
    • Mozambique
    • Namibia
    • Niger
    • Nigeria
    • Réunion
    • Rwanda
    • Saint Helena, Ascension and Tristan da Cunha
    • São Tomé and Príncipe
    • Senegal
    • Seychelles
    • Sierra Leone
    • Somalia
    • South Africa
    • South Sudan
    • Sudan
    • Tanzania
    • Togo
    • Tunisia
    • Uganda
    • Western Sahara
    • Zambia
    • Zimbabwe
  • All Continents

🇮🇴 British Indian Ocean Territory

Flag of British Indian Ocean TerritoryNational Flag

Geography & Borders

This country has no land borders.

Introduction & Background

The British Indian Ocean Territory (BIOT) is an Overseas Territory of the United Kingdom situated in the Indian Ocean, halfway between Tanzania and Indonesia. The territory comprises the seven atolls of the Chagos Archipelago with over 1,000 individual islandsmany very smallamounting to a total land area of 60 square kilometres (23 square miles).2 The largest and most southerly island is Diego Garcia, 27 square kilometres (10 square miles), the site of a Joint Military Facility of the United Kingdom and the United States.5

The only inhabitants are British and United States military personnel, and associated contractors, who collectively number around 3,000 (2018 figures).2 The forced removal of Chagossians from the Chagos Archipelago occurred between 1968 and 1973. The Chagossians, then numbering about 2,000 people, were expelled by the UK government to Mauritius and Seychelles in order to construct the military base. Today, the exiled Chagossians are still trying to return, saying that the forced expulsion and dispossession was unlawful, but the UK government has repeatedly denied them the right of return.67 The islands are off-limits to Chagossians, casual tourists, and the media.

Key Information
AttributeDetails
Official Name
British Indian Ocean Territory
Capital
Diego Garcia
Continent
Africa
Region / Subregion
Africa / Eastern Africa
Population
N/A
Area
60 km²
Languages
English
Currencies
United States dollar ($) [USD]
Cost of Living
25 / 100 (Low)
Price per Coffee
$1.25
Price per Meal
$5.00
Timezones
UTC+06:00 (IOT)
Bounding Box
Min: (6.04° S, 71.47° E)
Max: (5.96° S, 71.53° E)
Climate
Temperate
Terrain
High plateaus, volcanic mountains, and the Great Rift Valley

Geography & Climate

Climate, weather, and air quality data are based on historical records for the geographical center coordinates.

Temperature (2025)

20°30°
Jan
25.8° / 27.7°
Feb
26° / 27.7°
Mar
26.4° / 28.6°
Apr
26.6° / 28.8°
May
27.2° / 29°
Jun
26.5° / 28.2°
Jul
26.1° / 27.7°
Aug
25.6° / 27.3°
Sep
25.8° / 27.4°
Oct
25.6° / 27.4°
Nov
25.8° / 27.9°
Dec
25.7° / 27.9°

Precipitation & Snow (2025)

308Jan
310Feb
245Mar
197Apr
99May
122Jun
214Jul
311Aug
168Sep
416Oct
149Nov
241Dec
Rain (mm) Snow (cm)

Atmospheric Pressure (2025)

1009.4-1.4Jan
1011+0.2Feb
1010.2-0.6Mar
1010.2-0.6Apr
1010.2-0.6May
1011.2+0.4Jun
1010.9+0.1Jul
1011.5+0.7Aug
1011.7+0.9Sep
1010.5-0.3Oct
1012.3+1.5Nov
1010.5-0.3Dec

Thunderstorm Days (2025)

0Jan
0Feb
0Mar
0Apr
0May
0Jun
0Jul
0Aug
0Sep
0Oct
0Nov
0Dec

Wind Speed (2025)

Jan
32
Feb
22.8
Mar
22.9
Apr
19
May
21.7
Jun
26.7
Jul
29.7
Aug
27.8
Sep
23.4
Oct
25.6
Nov
17.4
Dec
22.1

Air Quality — Monthly Averages (2025)

MetricJanFebMarAprMayJunJulAugSepOctNovDec
PM2.5 μg/m³7.28.24.93.65.45.96.25.55.85.343.9
PM10 μg/m³11.611.87.85.88.69.710.19.39.38.56.36.3
O₃ μg/m³39.540.231.13445.650.448.445.24341.440.435
NO₂ μg/m³000000000000
SO₂ μg/m³0.20.20.10.10.20.30.30.20.20.20.20.2
CO μg/m³11512994758181818789928784

Pollen Levels — Monthly (2025)

Pollen data is negligible or unavailable for this location.

⛰️ Highest Elevation

▲
Unnamed location on Diego Garcia15 m / 49 ft

  • Map Locations: Google Maps | OpenStreetMap

People & Society

Total PopulationN/A
Annual Growth RateN/AN/A
Life ExpectancyN/AAverage lifespan at birth
Fertility RateN/ABirths per woman



← Back to Africa

Prev
Botswana
Next
Burkina Faso