23 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. ] :
| | AUSTRIA | (Vienna) | | President Alexander Van der Bellen | | |
| | AUSTRALIA | (Canberra) | | David Hurley | | |
| | BURKINA FASO | (Ouagadougou) | | President Roch Marc Christian Kabore | | |
| | BULGARIA | (Sofia) | | President Rumen Radev | | |
| | CHINA | (Beijing) | | Xi Jinping | | |
| | COLOMBIA | (Bogota) | | President Ivan Duque Marquez | | |
| | ECUADOR | (San Francisco of Quito) | | President Lenin Moreno | | |
| | EGYPT | (Cairo a + Alexandria r + Almasa New Capital City f) | | President Abdel Fattah el-Sisi | | |
| | FRANCE | (Paris) | | President Emmanuel Macron | | |
| | ITALY | (Rome a) | | President Sergio Mattarella | | |
| | JORDAN | (Amman) | | King Abdullah II | | |
| | KENYA | (Nairobi) | | President Uhuru Kenyatta | | |
| | KUWAIT | (Kuwait City) | | Emir Sheikh Nawaf Al Ahmad Al Jabir Al Sabah | | |
| | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) | | King Willem-Alexander | | |
| | NORWAY | (Oslo) | | King Harald V | | |
| | OPEC | (Vienna) | | SG Mohammed Sanusi Barkindo (ng) | | |
| | PHILIPPINES | (Manila acr + Quezon City b + Pasay City b) | | President Rodrigo Duterte | | |
| | PARAGUAY | (Assumption) | | President Mario Abdo Benitez | | |
| | ROMANIA | (Bucharest) | | President Klaus Iohannis | | |
| | SUDAN | (Khartoum) | | Abdel-Fatah al-Burhan Abdelrahman | | |
| | SENEGAL | (Dakar) | | President Macky Sall | | |
| | TUNISIA | (Tunis a + Bardois df) | | President Kais Saied | | |
| | AMERICA | (Washington-District of Columbia) | | President Donald Trump | | |