Sierra Leone is a member of the Mano River Union (MRU), which includes Guinea, Sierra Leone, Liberia, and Côte d’Ivoire.  Sierra Leone is also a member of the Economic Community of West African States (ECOWAS), which includes fifteen countries: Benin, Burkina Faso, Cape Verde, Côte d’Ivoire, The Gambia, Ghana, Guinea Bissau, Guinea, Liberia, Mali, Niger, Nigeria, Senegal, Sierra Leone, and Togo.  ECOWAS is in the process of developing a customs union among its members, allowing for the free flow of goods and services between member nations and the use of a single currency.

Sierra Leone has a preferential trade agreement with the European Union through the Everything but Arms (EBA) initiative and with the United States through the African Growth and Opportunity Act (AGOA). Sierra Leone is also party to a multilateral agreement with the African Continental Free Trade Agreement, a trade agreement between 55 African Union member states to create a single market and a single currency union.