46 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) | | President Sheikh Khalifa bin Zayed Al Nahyan | | |
| | BANGLADESH | (Dhaka a) | | President Iajuddin Ahmed | | |
| | BAHRAIN | (Manamah) | | King Sheikh Hamad bin Isa Al Khalifah | | |
| | BRUNEI DARUSSALAM | (Bandar Seri Begawan) | | Sultan Hassanal Bolkiah | | |
| | BOTSWANA | (Gaborone) | | President Festus Mogae | | |
| | CHINA | (Beijing) | | Hu Jintao | | |
| | CYPRUS | (Nicosia) | | President Tassos Papadopoulos | | |
| | EGYPT | (Cairo a + Alexandria r) | | President Hosni Mubarak | | |
| | GHANA | (Accra) | | President John Kufuor | | |
| | GAMBIA | (Banjul) | | President Yahya Jammeh | | |
| | 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 | | |
| | IRAQ | (Baghdad a + Camp Victory m) | | President Ghazi Al-Yawer | | |
| | IRAN | (Tehran) | | Supreme Leader Ayatollah Ali Khamenei | | |
| | JORDAN | (Amman) | | King Abdullah II | | |
| | JAPAN | (Tokyo) | | Emperor Akihito | | |
| | KENYA | (Nairobi) | | President Emilio Mwai Kibaki | | |
| | NORTH KOREA | (Pyongyang a) | | Kim Jong-Il | | |
| | SOUTH KOREA | (Seoul a) | | President Roh Moo-Hyun | | |
| | KUWAIT | (Kuwait City) | | Emir Sheikh Jabir III Al Ahmad Al Jabir Al Sabah | | |
| | LEBANON | (Beirut a + Hadeth d) | | President Emile Lahoud | | |
| | SRI LANKA | (Sri Jayewardenepura Kotte al + Colombo ejnr + Kandy r) | | President Chandrika Kumaratunga | | |
| | LIBYA | (Tripoli a) | | Guide Muammar Gaddafi | | |
| | MYANMAR | (Yangon a) | | Than Shwe | | |
| | MONGOLIA | (Ulan-Bator) | | President Natsagiin Bagabandi | | |
| | MAURITIUS | (Port Louis a + Reduit in Moka r) | | President Sir Anerood Jugnauth | | |
| | MALAYSIA | (Putrajaya aj + Kuala Lumpur ejlry) | | Raja Syed Sirajuddin I | | |
| | NIGERIA | (Abuja a) | | President Olusegun Obasanjo | | |
| | NEPAL | (Kathmandu) | | Maharajah Gyanendra Bir Bikram Shah Dev | | |
| | OMAN | (Muscat) | | Sultan Qaboos bin Said | | |
| | PAKISTAN | (Islamabad) | | President Pervez Musharraf | | |
| | PALESTINE | (Ramallah qr + Gaza br + (East Jerusalem)) | | Rauhi Fattouh | | |
| | QATAR | (Doha) | | Emir Sheikh Hamad bin Khalifah Al Thani | | |
| | SAUDI ARABIA | (Riyadh) | | King Fahd | | |
| | SUDAN | (Khartoum) | | President Omar Al-Bashir | | |
| | SINGAPORE | (Singapore) | | President Sellapan Ramanathan Nathan | | |
| | SIERRA LEONE | (Freetown) | | President Ahmad Tejan Kabbah | | |
| | SENEGAL | (Dakar) | | President Abdoulaye Wade | | |
| | SOMALIA | (Mogadishu a + Nairobi x) | | President Abdullahi Yusuf Ahmed | | |
| | SYRIA | (Damascus) | | President Bashar Al-Assad | | |
| | THAILAND | (Bangkok) | | King Rama IX Bhumibol Adulyadej | | |
| | TURKEY | (Ankara a) | | President Ahmet Necdet Sezer | | |
| | TANZANIA | (Dodoma City al + Dar Es Salaam jnqr) | | President Benjamin Mkapa | | |
| | UGANDA | (Kampala a + Entebbe r) | | President Yoweri Museveni | | |
| | YEMEN | (Sanaa) | | President Ali Abdullah Saleh | | |
| | SOUTH AFRICA | (Pretoria ae + Cape Town l + Bloemfontein j + Johannesburg d) | | President Thabo Mbeki | | |