Population
Population data is unavailable for British Indian Ocean Territory, so a relative difference cannot be calculated.

This comparison uses the latest available atlas values for each country; reporting years can differ by metric.
Proportional bars and relative differences make the headline numbers easier to read.
Population data is unavailable for British Indian Ocean Territory, so a relative difference cannot be calculated.
Surface area data is unavailable for British Indian Ocean Territory, so a relative difference cannot be calculated.
Population density data is unavailable for British Indian Ocean Territory, so a relative difference cannot be calculated.
Nominal GDP data is unavailable for British Indian Ocean Territory, so a relative difference cannot be calculated.
GDP per capita data is unavailable for British Indian Ocean Territory, so a relative difference cannot be calculated.
Values use the latest available observations in WorldSumma. Economic reporting years are shown when available and can differ by country.
Diego Garcia
Antananarivo
—
31,964,956
—
587,295 km²
—
54.4 /km²
—
$17.42 billion · 2024
—
$545 · 2024
Africa
Africa
Eastern Africa
Eastern Africa
United States dollar · USD · $
Malagasy ariary · MGA · Ar
BIOT
Malagasy
+246
+261
.io
.mg
IO / IOT
MG / MDG
Indian/Chagos
Indian/Antananarivo
British Indian Ocean Territory
Madagasikara
| Measure | British Indian Ocean Territory | Madagascar |
|---|---|---|
| Capital | Diego Garcia | Antananarivo |
| Population | — | 31,964,956 |
| Surface area | — | 587,295 km² |
| Population density | — | 54.4 /km² |
| Nominal GDP | — | $17.42 billion · 2024 |
| GDP per capita | — | $545 · 2024 |
| Region | Africa | Africa |
| Subregion | Eastern Africa | Eastern Africa |
| Currency | United States dollar · USD · $ | Malagasy ariary · MGA · Ar |
| Nationality | BIOT | Malagasy |
| Phone code | +246 | +261 |
| Internet domain | .io | .mg |
| ISO codes | IO / IOT | MG / MDG |
| Time zone | Indian/Chagos | Indian/Antananarivo |
| Native name | British Indian Ocean Territory | Madagasikara |
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The British Indian Ocean Territory (BIOT) is a remote British Overseas Territory scattered across the central Indian Ocean, best known for its strategic military base on Diego Garcia and its pristine coral atolls that whisper of an untouched tropical paradise.
Full British Indian Ocean Territory profile →Madagascar, officially the Republic of Madagascar, is the world's fourth-largest island located in the Indian Ocean off the southeastern coast of Africa. With a population of over 26 million, it is known for its unique biodiversity, distinctive cultures, and vibrant arts.
Full Madagascar profile →The capital of British Indian Ocean Territory is Diego Garcia.
British Indian Ocean Territory uses the United States dollar (USD), with the symbol $.
British Indian Ocean Territory is located in Eastern Africa, Africa.
People from British Indian Ocean Territory are referred to as BIOT.
The international dialing code for British Indian Ocean Territory is +246.
The country code top-level domain (ccTLD) for British Indian Ocean Territory is .io.
British Indian Ocean Territory uses the Indian/Chagos time zone.
The British Indian Ocean Territory (BIOT) is a remote British Overseas Territory scattered across the central Indian Ocean, best known for its strategic military base on Diego Garcia and its pristine coral atolls that whisper of an untouched tropical paradise.
The capital of Madagascar is Antananarivo.
Madagascar has a recorded population of approximately 31,964,956 people.
Madagascar covers an area of about 587,295 km².
Madagascar has a population density of roughly 54.4 /km² (people per square kilometre).
Madagascar has a gross domestic product (GDP) of approximately $17.42 billion as of 2024.
Madagascar has a GDP per capita of approximately $545.
Madagascar uses the Malagasy ariary (MGA), with the symbol Ar.
Madagascar is located in Eastern Africa, Africa.
The native name of Madagascar is Madagasikara.
People from Madagascar are referred to as Malagasy.
The international dialing code for Madagascar is +261.
The country code top-level domain (ccTLD) for Madagascar is .mg.
Madagascar uses the Indian/Antananarivo time zone.
Madagascar, officially the Republic of Madagascar, is the world's fourth-largest island located in the Indian Ocean off the southeastern coast of Africa. With a population of over 26 million, it is known for its unique biodiversity, distinctive cultures, and vibrant arts.