22 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 | | |
| | AUSTRALIA | (Canberra) | | David Hurley | | |
| | BANGLADESH | (Dhaka a) | | President Abdul Hamid | | |
| | 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 | | |
| | KENYA | (Nairobi) | | President Uhuru Kenyatta | | |
| | COMOROS | (Moroni) | | President Azali Assoumani | | |
| | SRI LANKA | (Sri Jayewardenepura Kotte al + Colombo ejnr + Kandy r) | | President Gotabaya Rajapaksa | | |
| | MADAGASCAR | (Tananarive) | | President Andry Rajoelina | | |
| | MAURITIUS | (Port Louis a + Reduit in Moka r) | | President Prithvirajsing Pradeep Roopun | | |
| | MALDIVES | (Male) | | President Ibrahim Mohamed Solih | | |
| | MALAYSIA | (Putrajaya aj + Kuala Lumpur ejlry) | | Sultan Abdullah Shah | | |
| | MOZAMBIQUE | (Maputo) | | President Filipe Nyusi | | |
| | OMAN | (Muscat) | | Sultan Haitham bin Tarik | | |
| | SEYCHELLES | (Port Victoria) | | President Danny Faure | | |
| | SINGAPORE | (Singapore) | | President Halimah Yacob | | |
| | SOMALIA | (Mogadishu-Hamar Weyne) | | President Mohamed Abdullahi Mohamed Farmajo | | |
| | THAILAND | (Bangkok) | | King Rama X. Vajiralongkorn | | |
| | TANZANIA | (Dodoma City al + Dar Es Salaam jnqr) | | President John Magufuli | | |
| | YEMEN | (Aden qt + Riyadh x) | | President Abd Rabbuh Mansur Hadi | | |
| | SOUTH AFRICA | (Pretoria ae + Cape Town l + Bloemfontein j + Johannesburg d) | | President Cyril Ramaphosa | | |