
| Name: | League of Arab States (Arab League) |
| Foundation date: | 22 March 1945 |
| Headquarters: | Cairo (Egypt) |
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Flag of the Arab League |
| 22 March 1945 | |
| 28 March 1953 | Libya |
| 19 January 1956 | Sudan |
| 1 January 1958 | Tunisia |
| 1 October 1958 | Morocco |
| 20 July 1961 | Kuwait |
| 16 August 1962 | Algeria |
| 12 December 1967 | South Yemen (merged to Republic of Yemen in 1990) |
| 11 September 1971 | Bahrain, Qatar |
| 29 September 1971 | Oman |
| 6 December 1971 | United Arab Emirates |
| 26 November 1973 | Mauritania |
| 14 February 1974 | Somalia |
| 9 September 1976 | Palestine Liberation Organization |
| 4 September 1977 | Djibouti |
| 20 November 1993 | Comoros |