44 Members (excluding the associate or suspended members but including the countries represented on their behalf) [The rulers are not necessarily the representatives in the organisation. ] :
| | UNITED ARAB EMIRATES | (Abu Dhabi ar + Al Karama f) | | President Sheikh Zayed II bin Sultan Al Nahyan | | |
| | AFGHANISTAN | (Kabul) | | President Mohammad Najibullah | | |
| | BANGLADESH | (Dhaka a) | | President Abdur Rahman Biswas | | |
| | BURKINA FASO | (Ouagadougou) | | President Blaise Compaore | | |
| | BAHRAIN | (Manamah) | | Emir Sheikh Isa II bin Salman Al Khalifah | | |
| | BENIN | (Porto Novo a + Cotonou ilnqr) | | President Nicephore Soglo | | |
| | BRUNEI DARUSSALAM | (Bandar Seri Begawan) | | Sultan Hassanal Bolkiah | | |
| | CAMEROON | (Yaounde) | | President Paul Biya | | |
| | JIBUTI | (Jibuti) | | President Hassan Gouled Aptidon | | |
| | ALGERIA | (Algiers a + El Biar d + El Mouradia r) | | Mohamed Boudiaf | | |
| | EGYPT | (Cairo a + Alexandria r) | | President Hosni Mubarak | | |
| | GABON | (Libreville) | | President Omar Bongo | | |
| | THE GAMBIA | (Banjul) | | President Sir Dawda Jawara | | |
| | GUINEA | (Conakry) | | President Lansana Conte | | |
| | GUINEA-BISSAU | (Bissau) | | President Joao Bernardo Vieira | | |
| | INDONESIA | (Jakarta a + Bogor r + Chipanas r + Yogyakarta r + Tampaksiring r) | | President Haji Muhammad Suharto | | |
| | IRAQ | (Baghdad) | | President Saddam Hussein al-Tikriti | | |
| | IRAN | (Tehran) | | Supreme Leader Ayatollah Ali Khamenei | | |
| | JORDAN | (Amman) | | King Hussein I | | |
| | COMOROS | (Moroni) | | President Said Mohamed Djohar | | |
| | KUWAIT | (Kuwait City) | | Emir Sheikh Jabir III Al Ahmad Al Jabir Al Sabah | | |
| | LEBANON | (Beirut a + Hadeth d) | | President Elias Hrawi | | |
| | LIBYA | (Tripoli a) | | Guide Muammar Gaddafi | | |
| | MOROCCO | (Rabat a) | | King Hassan II | | |
| | MALI | (Bamako) | | President Alpha Oumar Konare | | |
| | MAURITANIA | (Nouakchott) | | Colonel Maaouya Ould Sid´Ahmed Taya | | |
| | MALDIVES | (Male) | | President Maumoon Abdul Gayoom | | |
| | MALAYSIA | (Kuala Lumpur) | | Sultan Azlan Muhibuddin Shah | | |
| | NIGER | (Niamey) | | President Ali Saibou | | |
| | OMAN | (Muscat) | | Sultan Qaboos bin Said | | |
| | PAKISTAN | (Islamabad) | | President Ghulam Ishaq Khan | | |
| | PALESTINE | (Algiers x) | | President Yasser Arafat | | |
| | QATAR | (Doha) | | Emir Sheikh Khalifah bin Hamad Al Thani | | |
| | SAUDI ARABIA | (Riyadh) | | King Fahd | | |
| | SUDAN | (Khartoum) | | Omar Al-Bashir | | |
| | SIERRA LEONE | (Freetown) | | President Joseph Saidu Momoh | | |
| | SENEGAL | (Dakar) | | President Abdou Diouf | | |
| | SOMALIA | (Mogadishu) | | President Ali Mahdi Muhammad | | |
| | SYRIA | (Damascus) | | President Hafez Al-Assad | | |
| | CHAD | (Ndjamena) | | President Idriss Deby | | |
| | TUNISIA | (Tunis) | | President Zine El Abidine Ben Ali | | |
| | TURKEY | (Ankara a) | | President Turgut Ozal | | |
| | UGANDA | (Kampala a + Entebbe r) | | President Yoweri Museveni | | |
| | YEMEN | (Sanaa) | | President Ali Abdullah Saleh | | |