The West African Economic and Monetary Union, generally referred in English to by its French acronym UEMOA (for Union Économique et Monétaire Ouest-Africaine) and alternatively as WAEMU, is a treaty-based arrangement binding together eight West African states, seven of which were previously colonies of French West Africa. It was established to promote monetary and financial stability as well as economic integration among countries that share the West African CFA franc (ISO 4217: XOF) as a common currency. From 1962 to 1994, it was known as the West African Monetary Union (WAMU or, in French, UMOA for Union Monétaire Ouest-Africaine).
Territorially, UEMOA mostly overlaps with the larger regional organization, the Economic Community of West African States (ECOWAS).