16 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. ] :
| | BANGLADESH | (Dhaka a) | | President Abdul Hamid | | |
| | BRAZIL | (Brasilia) | | President Jair Bolsonaro | | |
| | CHINA | (Beijing) | | Xi Jinping | | |
| | EGYPT | (Cairo a + Alexandria r + Almasa New Capital City f) | | President Abdel Fattah el-Sisi | | |
| | INDONESIA | (Jakarta a + Bogor r + Chipanas r + Yogyakarta r + Tampaksiring r) | | President Joko Widodo | | |
| | INDIA | (New Delhi a + Simla s + Bolarum w) | | President Ram Nath Kovind | | |
| | IRAN | (Tehran) | | Supreme Leader Ayatollah Ali Khamenei | | |
| | SOUTH KOREA | (Seoul adknr + Sejong b) | | President Moon Jae-In | | |
| | MEXICO | (Mexico City) | | President Andres Manuel Lopez Obrador | | |
| | NIGERIA | (Abuja a) | | President Muhammadu Buhari | | |
| | PHILIPPINES | (Manila acr + Quezon City b + Pasay City b) | | President Rodrigo Duterte | | |
| | PAKISTAN | (Islamabad) | | President Arif Alvi | | |
| | RUSSIA | (Moscow a + Saint Petersburg d) | | President Vladimir Putin | | |
| | TURKEY | (Ankara a + Marmaris s) | | President Recep Tayyip Erdogan | | |
| | VIETNAM | (Hanoi) | | Nguyen Phu Trong | | |
| | SOUTH AFRICA | (Pretoria ae + Cape Town l + Bloemfontein j + Johannesburg d) | | President Cyril Ramaphosa | | |