| Name: | African Union |
| Former names: | Organization of African Unity (1963-2002) |
| Foundation date: | 25 May 1963 |
| Headquarters: | Аддис-Абеба (Ethiopia) |
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OAU flag 1970-2002 |
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Flag of the African Union since 2002 |
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Anthem of the African Union |
| 25 May 1963 | Algeria,
Burundi,
Cameroon,
Central African Republic,
Chad,
Democratic Republic of the Congo,
Republic of the Congo,
Dahomey (since 1975 Benin),
Ethiopia,
Gabon,
Ghana,
Guinea,
Ivory Coast,
Liberia,
Libya,
Malagasy Republic (since 1975 Madagascar),
Mali,
Mauritania,
Morocco (withdrew 12 November 1984),
Niger,
Nigeria,
Rwanda,
Senegal,
Sierra Leone,
Somalia,
Sudan,
Tanganyika (since 1964 in составе Tanzania),
Togo,
Tunisia,
Uganda,
United Arab Republic (since 1971 Egypt),
Upper Volta (since 1984 Burkina Faso),
Zanzibar (merged to Tanzania in 1964) |
| 13 December 1963 | Kenya |
| 13 July 1964 | Malawi |
| 16 December 1964 | Zambia |
| October 1965 | Gambia |
| 31 October 1966 | Botswana, Lesotho |
| август 1968 | Mauritius |
| 24 September 1968 | Swaziland |
| 12 October 1968 | Equatorial Guinea |
| 19 November 1973 | Guinea-Bissau |
| 11 February 1975 | Angola |
| 18 July 1975 | Cape Verde, Comoros, Mozambique, Sao Tome and Principe |
| 29 June 1976 | Seychelles |
| 27 June 1977 | Djibouti |
| June 1980 | Zimbabwe |
| 22 February 1982 | Western Sahara |
| June 1990 | Namibia |
| 24 May 1993 | Eritrea |
| 6 June 1994 | South Africa |
