Ranking of the ten least developed countries in the world:
1. Malawi: GDP per capita is $255, located in southeast Africa.
2. Burundi: per capita GDP of 286 US dollars, located on the south side of the equator in central and eastern Africa.
3. Central Africa: per capita GDP of 358 US dollars, located in central Africa.
4. Niger: per capita GDP of $427, located in central and western Africa.
5. The per capita GDP of the Democratic Republic of the Congo is 449 US dollars, spanning Central Africa.
6. Madagascar: GDP per capita is $449.4, located in the western Indian Ocean.
7. Liberia: GDP per capita is $457, located in West Africa.
8. Gambia: GDP per capita is $484, located on the Atlantic coast of West Africa, bordering the Atlantic Ocean to the west.
9. Guinea: per capita GDP of $539, located in west-central Africa, west of the Atlantic Ocean.
10. Somalia: GDP per capita is $542, located in the easternmost Somali Peninsula on the African continent.
There are 46 least developed countries in the world with a population of 1.1 billion, and the top 10 are all in Africa.