| Country | Membership Date |
|---|---|
| Angola** | 1975 |
| Benin* | 1960 |
| Burundi | 1962 |
| Cameroon* | 1960 |
| Central African Republic | 1960 |
| Congo (Brazzaville)* | 1960 |
| Côte d’Ivoire* | 1960 |
| Ethiopia | 1962 |
| Gabon* | 1960 |
| Ghana | 1978 |
| Guinea | 1979 |
| Equatorial Guinea | 1982 |
| Kenya*** | 1960 |
| Liberia | 1972 |
| Madagascar* | 1960 |
| Malawi | 1977 |
| Nigeria | 1962 |
| Rwanda | 1962 |
| Sierra Leone | 1962 |
| Tanzania* | 1962 |
| Togo | 1961 |
| Uganda | 1960 |
| DR Congo | 1962 |
| Zambia | 1985 |
| Zimbabwe | 1981 |