The administrative headquarters of the Economic Community of West Africa States (ECOWAS) is in

The administrative headquarters of the Economic Community of West African States (ECOWAS) is located in Abuja. ECOWAS is a regional intergovernmental organization comprising 15 West African countries. The headquarters is the central hub for the coordination and implementation of various programs and policies aimed at promoting economic integration, regional cooperation, and political stability among member states. Therefore, the correct answer is Abuja.