Which west African country has the largest population?

Answer 1

Mauritius is by far the most densely populated African country (around 550 inhabitants per km2), followed by Rwanda (around 300 inhabitants per km2).

here is a world list:

http://en.wikipedia.org/wiki/List_of_countries_by_population_density

Answer 2

with 126.6 million people, Nigeria has the largest population in West Africa :D

Answer 3

Nigeria, an heterogeneous society with about 150 million people, and 360 ethic groups.

Answer 4

Nigeria, 130 million.