All the following are members of the ECOWAS except

The Economic Community of West African States (ECOWAS) is a regional political and economic union of countries located in West Africa. Its objective is to promote economic integration across the region. The official member states of ECOWAS include countries in West Africa.

Among the options provided:

• Cote d'Ivoire is a member of ECOWAS. It is located in West Africa and actively participates in the community’s activities.
• Burkina Faso is also a member of ECOWAS. Like Cote d'Ivoire, it is found in West Africa and is part of the union.
• Senegal is another member state of ECOWAS, contributing to the regional integration efforts.

Cameroun, however, is not a member of ECOWAS. While it is geographically close to West Africa, it is primarily considered part of Central Africa, and it is a member of the Central African community organization instead.