The Africa West Area. The Africa West Area includes 22 countries. They are Benin; Burkina Faso; Cameroon; Central African Republic; Chad; Côte d'Ivoire; Equatorial Guinea; Gambia; Ghana; Guinea; Guinea-Bissau; Liberia; Mali; Mauritania; Niger; Nigeria; São Tomé and Príncipe; Senegal; Sierra Leone; Sudan; Togo; Western Sahara. We all learned about Africa in school but perhaps not all there is to know. This graphic shows the size of Africa compared to other continents. Click on the graphic for a better view.