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 | | |
| | AUSTRALIA | (Canberra) | | Sir Peter Cosgrove | | |
| | 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 Pranab Mukherjee | | |
| | IRAN | (Tehran) | | Supreme Leader Ayatollah Ali Khamenei | | |
| | KENYA | (Nairobi) | | President Uhuru Kenyatta | | |
| | COMOROS | (Moroni) | | President Ikililou Dhoinine | | |
| | SRI LANKA | (Sri Jayewardenepura Kotte al + Colombo ejnr + Kandy r) | | President Maithripala Sirisena | | |
| | MADAGASCAR | (Tananarive) | | President Hery Rajaonarimampianina | | |
| | MAURITIUS | (Port Louis a + Reduit in Moka r) | | President Rajkeswur Kailash Purryag | | |
| | MALAYSIA | (Putrajaya aj + Kuala Lumpur ejlry) | | Sultan Abdul Halim Muadzam Shah | | |
| | MOZAMBIQUE | (Maputo) | | President Filipe Nyusi | | |
| | OMAN | (Muscat) | | Sultan Qaboos bin Said | | |
| | SEYCHELLES | (Port Victoria) | | President James Michel | | |
| | SINGAPORE | (Singapore) | | President Tony Tan Keng Yam | | |
| | SOMALIA | (Mogadishu-Hamar Weyne) | | President Hassan Sheikh Mohamud | | |
| | THAILAND | (Bangkok) | | King Rama IX Bhumibol Adulyadej | | |
| | TANZANIA | (Dodoma City al + Dar Es Salaam jnqr) | | President Jakaya Kikwete | | |
| | YEMEN-ADEN | (Aden qt) | | President Abd Rabbuh Mansur Hadi | | |
| | SOUTH AFRICA | (Pretoria ae + Cape Town l + Bloemfontein j + Johannesburg d) | | President Jacob Zuma | | |