- Algeria
- Burundi
- Cameroon
- Central African Republic
- Chad
- Congo-Brazzaville
- Congo-Leopoldville (now the Democratic Republic of the Congo)
- Dahomey (now Benin)
- Ethiopia
- Gabon
- Ghana
- Guinea
- Ivory Coast (now Cote d'Ivoire)
- Kenya
- Liberia
- Libya
- Madagascar
- Mali
- Mauritania
- Morocco
- Niger
- Nigeria
- Rwanda
- Senegal
- Sierra Leone
- Somalia
- Sudan
- Tanganyika (now part of Tanzania)
- Togo
- Tunisia
- Uganda
- United Arab Republic (now Egypt)
- Upper Volta (now Burkina Faso)
- Zanzibar (now part of Tanzania)
The main objectives of the OAU were to promote unity and solidarity among African states, to defend their sovereignty and territorial integrity, to eliminate colonialism and apartheid, and to promote economic and social development on the continent. The OAU was succeeded by the African Union in 2002.