57 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 Muhammad bin Zayed Al Nahyan |  | |
 |  | AFGHANISTAN | (Dushanbe x) |  | Amrullah Saleh | | |
 |  | ALBANIA | (Tirana) |  | President Ilir Meta |  | |
 |  | AZERBAIJAN | (Baku) |  | President Iham Aliyev | | |
 |  | BANGLADESH | (Dhaka a) |  | President Abdul Hamid | | |
 |  | BURKINA FASO | (Ouagadougou) |  | President Paul-Henri Sandaogo Damiba |  | |
 |  | BAHRAIN | (Manamah) |  | King Sheikh Hamad bin Isa Al Khalifah | | |
 |  | BENIN | (Porto Novo a + Cotonou ilnqr) |  | President Patrice Talon | | |
 |  | BRUNEI DARUSSALAM | (Bandar Seri Begawan) |  | Sultan Hassanal Bolkiah | | |
 |  | COTE D´IVOIRE | (Yamoussoukro a + Abidjan dln + Cocody b) |  | President Alassane Ouattara | | |
 |  | CAMEROON | (Yaounde) |  | President Paul Biya | | |
 |  | DJIBOUTI | (Djibouti) |  | President Ismail Omar Guelleh | | |
 |  | ALGERIA | (Algiers a + El Biar d + El Mouradia r) |  | State President Abdelmadjid Tebboune | | |
 |  | EGYPT | (Cairo a + Alexandria r + Almasa New Capital City f) |  | President Abdel Fattah el-Sisi | | |
 |  | GABON | (Libreville) |  | President Ali Ben Bongo Ondimba | | |
 |  | GAMBIA | (Banjul) |  | President Adama Barrow | | |
 |  | GUINEA | (Conakry) |  | Mamady Doumbouya | | |
 |  | GUINEA-BISSAU | (Bissau) |  | President Umaro Sissoco Embalo | | |
 |  | GUYANA | (Georgetown) |  | President Mohamed Irfaan Ali |  | |
 |  | INDONESIA | (Jakarta a + Nusantara f + Bogor r + Chipanas r + Yogyakarta r + Tampaksiring r) |  | President Joko Widodo | | |
 |  | IRAQ | (Baghdad) |  | President Barham Salih | | |
 |  | IRAN | (Tehran) |  | Supreme Leader Ayatollah Ali Khamenei | | |
 |  | JORDAN | (Amman) |  | King Abdullah II | | |
 |  | KYRGYZSTAN | (Bishkek) |  | President Sadyr Zhaparov | | |
 |  | COMOROS | (Moroni) |  | President Azali Assoumani | | |
 |  | KUWAIT | (Kuwait City) |  | Emir Sheikh Nawaf Al Ahmad Al Jabir Al Sabah | | |
 |  | KAZAKHSTAN | (Nur-Sultan a) |  | President Kasym-Zhomart Tokayev | | |
 |  | LEBANON | (Beirut a + Baabda r + Hadeth d) |  | President Michel Aoun | | |
 |  | LIBYA | (Tripoli a) |  | Muhammad Younus Al-Menfi | | |
 |  | MOROCCO | (Rabat a) |  | King Muhammad VI | | |
 |  | MALI | (Bamako) |  | Assimi Goita | | |
 |  | MAURITANIA | (Nouakchott) |  | President Mohamed Ould Ghazouani | | |
 |  | MALDIVES | (Male) |  | President Ibrahim Mohamed Solih | | |
 |  | MALAYSIA | (Putrajaya aj + Kuala Lumpur ejlry) |  | Sultan Abdullah Shah | | |
 |  | MOZAMBIQUE | (Maputo) |  | President Filipe Nyusi | | |
 |  | NIGER | (Niamey) |  | President Mohamed Bazoum | | |
 |  | NIGERIA | (Abuja a) |  | President Muhammadu Buhari | | |
 |  | OMAN | (Muscat) |  | Sultan Haitham bin Tarik | | |
 |  | PAKISTAN | (Islamabad) |  | President Arif Alvi | | |
 |  | PALESTINE | (Ramallah qr + (East Jerusalem)) |  | President Mahmoud Abbas | | |
 |  | QATAR | (Doha) |  | Emir Sheikh Tamim bin Hamad Al Thani | | |
 |  | SAUDI ARABIA | (Riyadh) |  | King Salman | | |
 |  | SUDAN | (Khartoum) |  | Abdel-Fatah al-Burhan Abdelrahman | | |
 |  | SIERRA LEONE | (Freetown) |  | President Julius Maada Wonie Bio | | |
 |  | SENEGAL | (Dakar) |  | President Macky Sall | | |
 |  | SOMALIA | (Mogadishu-Hamar Weyne) |  | President Hassan Sheikh Mohamud | | |
 |  | SURINAME | (Paramaribo) |  | President Chan Santokhi | | |
 |  | SYRIA | (Damascus) |  | President Bashar Al-Assad | | |
 |  | CHAD | (Ndjamena) |  | General Mahamat Idriss Deby Itno Kaka | | |
 |  | TOGO | (Lome) |  | President Faure Gnassingbe | | |
 |  | TAJIKISTAN | (Dushanbe) |  | President Emomali Rakhmonov | | |
 |  | TURKMENISTAN | (Ashgabat) |  | President Serdar Berdymukhammedov | | |
 |  | TUNISIA | (Tunis a + Bardois df) |  | President Kais Saied | | |
 |  | TURKIYE | (Ankara a + Marmaris s) |  | President Recep Tayyip Erdogan | | |
 |  | UGANDA | (Kampala a + Entebbe r) |  | President Yoweri Museveni | | |
 |  | UZBEKISTAN | (Tashkent a) |  | Shavkat Mirziyayev | | |
 |  | YEMEN | (Riyadh x) |  | Rashad al-Alimi | | |
