| State |
Year of accession |
| Afghanistan | 1969 |
| Albania, Republic of | 1992 |
| Algeria, People's Democratic Republic of | 1969 |
| Azerbaijan, Republic of | 1991 |
| Bahrain, State of | 1970 |
| Bangladesh, People's Republic of | 1974 |
| Benin, Republic of | 1982 |
| Brunei Dar-us-Salaam, Sultanate of | 1984 |
| Burkina Faso | 1975 |
| Cameroon, Republic of | 1975 |
| Chad, Republic of | 1969 |
| Comoros, Federal Islamic Republic of the | 1976 |
| Cote d'Ivoire, Republic of | 2001 |
| Djibouti, Republic of | 1978 |
| Egypt, Arab Republic of | 1969 |
| Gabon, Republic of | 1974 |
| Gambia, Republic of the | 1974 |
| Guinea, Republic of | 1969 |
| Guinea-Bissau, Republic of | 1974 |
| Guyana, Republic of | 1998 |
| Indonesia, Republic of | 1969 |
| Iran, Islamic Republic of | 1969 |
| Iraq, Republic of | 1976 |
| Jordan, Hashemite Kingdom of | 1969 |
| Kazakhstan, Republic of | 1995 |
| Kuwait, State of | 1969 |
| Kyrghyzistan, Republic of | 1992 |
| Lebanon, Republic of | 1969 |
| Libya, Socialist People's Libyan Arab Jamahiriya | 1969 |
| Malaysia | 1969 |
| Maldives, Republic of | 1976 |
| Mali, Republic of | 1969 |
| Mauritania, Islamic Republic of | 1969 |
| Morocco, Kingdom of | 1969 |
| Mozambique, Republic of | 1994 |
| Niger, Republic of | 1969 |
| Nigeria, Federal Republic of | 1986 |
| Oman, Sultanate of | 1970 |
| Pakistan, Islamic Republic of | 1969 |
| Palestine, State of | 1969 |
| Qatar, State of | 1970 |
| Saudi Arabia, Kingdom of | 1969 |
| Senegal, Republic of | 1969 |
| Sierra Leone, Republic of | 1972 |
| Somalia, Democratic Republic of | 1969 |
| Sudan, Republic of the | 1969 |
| Surinam, Republic of the | 1996 |
| Syrian Arab Republic | 1970 |
| Tajikistan, Republic of | 1992 |
| Togo, Republic of | 1997 |
| Tunisia, Republic of | 1969 |
| Turkey, Republic of | 1969 |
| Turkmenistan, Republic of | 1992 |
| Uganda, Republic of | 1974 |
| United Arab Emirates, State of | 1970 |
| Uzbekistan, Republic of | 1995 |
| Yemen, Republic of | 1969 |