47 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 Abdul Hamid | | |
 |  | BAHRAIN | (Manamah) |  | King Sheikh Hamad bin Isa Al Khalifah | | |
 |  | BRUNEI DARUSSALAM | (Bandar Seri Begawan) |  | Sultan Hassanal Bolkiah | | |
 |  | BOTSWANA | (Gaborone) |  | President Seretse Ian Khama |  | |
 |  | CAMEROON | (Yaounde) |  | President Paul Biya | | |
 |  | CHINA | (Beijing) |  | Xi Jinping | | |
 |  | CYPRUS | (Nicosia) |  | President Nicos Anastasiades | | |
 |  | EGYPT | (Cairo a + Alexandria r) |  | President Abdel Fattah el-Sisi | | |
 |  | GHANA | (Accra) |  | President Nana Addo Dankwa Akufo-Addo | | |
 |  | THE GAMBIA | (Banjul) |  | President Adama Barrow | | |
 |  | INDONESIA | (Jakarta a + Bogor r + Chipanas r + Yogyakarta r + Tampaksiring r) |  | President Joko Widodo | | |
 |  | INDIA | (New Delhi a + Simla s + Bolarum w) |  | President Pranab Mukherjee | | |
 |  | IRAQ | (Baghdad) |  | President Fuad Masum | | |
 |  | IRAN | (Tehran) |  | Supreme Leader Ayatollah Ali Khamenei | | |
 |  | JORDAN | (Amman) |  | King Abdullah II | | |
 |  | JAPAN | (Tokyo) |  | Emperor Akihito | | |
 |  | KENYA | (Nairobi) |  | President Uhuru Kenyatta | | |
 |  | NORTH KOREA | (Pyongyang a) |  | Kim Jong-Un | | |
 |  | SOUTH KOREA | (Seoul adknr + Sejong b) |  | Hwang Kyo-Ahn | | |
 |  | KUWAIT | (Kuwait City) |  | Emir Sheikh Sabah IV Al Ahmad Al Jabir Al Sabah | | |
 |  | LEBANON | (Beirut a + Baabda r + Hadeth d) |  | President Michel Aoun | | |
 |  | SRI LANKA | (Sri Jayewardenepura Kotte al + Colombo ejnr + Kandy r) |  | President Maithripala Sirisena | | |
 |  | LIBYA | (Tripoli a) |  | Fayez El-Sarraj | | |
 |  | MYANMAR | (Naypyidaw a + Rangoon bn) |  | President Htin Kyaw | | |
 |  | MONGOLIA | (Ulan-Bator) |  | President Tsakhiagiyn Elbegdorj | | |
 |  | MAURITIUS | (Port Louis a + Reduit in Moka r) |  | President Ameenah Gurib-Fakim | | |
 |  | MALAYSIA | (Putrajaya aj + Kuala Lumpur ejlry) |  | Sultan Muhammad V. Faris Petra | | |
 |  | NIGERIA | (Abuja a) |  | President Muhammadu Buhari | | |
 |  | NEPAL | (Kathmandu) |  | President Bidhya Devi Bhandari | | |
 |  | OMAN | (Muscat) |  | Sultan Qaboos bin Said | | |
 |  | PAKISTAN | (Islamabad) |  | President Mamnoon Hussain | | |
 |  | PALESTINE | (Ramallah qr + (East Jerusalem)) |  | President Mahmoud Abbas | | |
 |  | QATAR | (Doha) |  | Emir Sheikh Tamim bin Hamad Al Thani | | |
 |  | SAUDI ARABIA | (Riyadh) |  | King Salman | | |
 |  | SUDAN | (Khartoum) |  | President Omar Al-Bashir | | |
 |  | SINGAPORE | (Singapore) |  | President Tony Tan Keng Yam | | |
 |  | SIERRA LEONE | (Freetown) |  | President Ernest Bai Koroma | | |
 |  | SENEGAL | (Dakar) |  | President Macky Sall | | |
 |  | SOMALIA | (Mogadishu-Hamar Weyne) |  | President Mohamed Abdullahi Mohamed Farmajo | | |
 |  | SYRIA | (Damascus) |  | President Bashar Al-Assad | | |
 |  | THAILAND | (Bangkok) |  | King Rama X. Vajiralongkorn | | |
 |  | TURKEY | (Ankara a) |  | President Recep Tayyip Erdogan | | |
 |  | TANZANIA | (Dodoma City aln + Dar Es Salaam jnqr) |  | President John Magufuli | | |
 |  | UGANDA | (Kampala a + Entebbe r) |  | President Yoweri Museveni | | |
 |  | YEMEN | (Aden lqt + Riyadh x) |  | President Abd Rabbuh Mansur Hadi | | |
 |  | SOUTH AFRICA | (Pretoria ae + Cape Town l + Bloemfontein j + Johannesburg d) |  | President Jacob Zuma | | |
