20 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. ] :
| | BRAZIL | (Brasilia) | | President Luiz Inacio Lula da Silva | | |
| | CHINA | (Beijing) | | Hu Jintao | | |
| | EGYPT | (Cairo a + Alexandria r) | | President Hosni Mubarak | | |
| | SPAIN | (Madrid) | | King Juan Carlos I | | |
| | FRANCE | (Paris) | | President Jacques Chirac | | |
| | INDONESIA | (Jakarta a + Bogor r + Chipanas r + Yogyakarta r + Tampaksiring r) | | President Susilo Bambang Yudhoyono | | |
| | INDIA | (New Delhi a + Simla s + Bolarum w) | | President Aavul Pakkiri Jainulabidin Abdul Kalam | | |
| | IRAN | (Tehran) | | Supreme Leader Ayatollah Ali Khamenei | | |
| | MOROCCO | (Rabat a) | | King Muhammad VI | | |
| | PAKISTAN | (Islamabad) | | President Pervez Musharraf | | |
| | QATAR | (Doha) | | Emir Sheikh Hamad bin Khalifah Al Thani | | |
| | RUSSIA | (Moscow) | | President Vladimir Putin | | |
| | SENEGAL | (Dakar) | | President Abdoulaye Wade | | |
| | TUNISIA | (Tunis) | | President Zine El Abidine Ben Ali | | |
| | TURKEY | (Ankara a) | | President Ahmet Necdet Sezer | | |
| | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | Queen Elizabeth II | | |
| | AMERICA | (Washington-District of Columbia) | | President George Walker Bush | | |
| | URUGUAY | (Montevideo) | | President Tabare Vazquez | | |
| | ISLAM | (Jedda) | | SG Ekmeleddin Ihsanoglu (tr) | | |
| | SOUTH AFRICA | (Pretoria ae + Cape Town l + Bloemfontein j + Johannesburg d) | | President Thabo Mbeki | | |