21 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 | | |
| | BAHRAIN | (Manamah) | | King Sheikh Hamad bin Isa Al Khalifah | | |
| | 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 | | |
| | IRAQ | (Baghdad) | | President Barham Salih | | |
| | JORDAN | (Amman) | | King Abdullah II | | |
| | COMOROS | (Moroni) | | President Azali Assoumani | | |
| | KUWAIT | (Kuwait City) | | Emir Sheikh Nawaf Al Ahmad Al Jabir Al Sabah | | |
| | LEBANON | (Beirut a + Baabda r + Hadeth d) | | President Michel Aoun | | |
| | LIBYA | (Tripoli a) | | Fayez El-Sarraj | | |
| | MOROCCO | (Rabat a) | | King Muhammad VI | | |
| | MAURITANIA | (Nouakchott) | | President Mohamed Ould Ghazouani | | |
| | OMAN | (Muscat) | | Sultan Haitham bin Tarik | | |
| | 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 | | |
| | SOMALIA | (Mogadishu-Hamar Weyne) | | President Mohamed Abdullahi Mohamed Farmajo | | |
| | TUNISIA | (Tunis a + Bardois df) | | President Kais Saied | | |
| | YEMEN | (Riyadh x) | | President Abd Rabbuh Mansur Hadi | | |