How many countries form ECOWAS

Explanation

There are currently 15 member countries in the Economic Community of West African States. The founding members of ECOWAS were: Benin, Côte d'Ivoire, Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Mali, Mauritania (left 2002), Niger, Nigeria, Senegal, Sierra Leone, Togo, and Burkina Faso (which joined as Upper Volta).