31 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 |  | |
 |  | BANGLADESH | (Dhaka a) |  | President Abdul Hamid | | |
 |  | BAHRAIN | (Manamah) |  | King Sheikh Hamad bin Isa Al Khalifah | | |
 |  | BRUNEI DARUSSALAM | (Bandar Seri Begawan) |  | Sultan Hassanal Bolkiah | | |
 |  | BHUTAN | (Thimphu a + Paro s) |  | King Jigme Khesar Namgyal Wangchuk | | |
 |  | CHINA | (Beijing) |  | Xi Jinping | | |
 |  | 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 | | |
 |  | JAPAN | (Tokyo) |  | Emperor Akihito | | |
 |  | KYRGYZSTAN | (Bishkek) |  | President Sooronbay Jeenbekov | | |
 |  | CAMBODIA | (Phnom Penh) |  | King Norodom Sihamoni | | |
 |  | SOUTH KOREA | (Seoul adknr + Sejong b) |  | President Moon Jae-In | | |
 |  | KUWAIT | (Kuwait City) |  | Emir Sheikh Sabah IV Al Ahmad Al Jabir Al Sabah | | |
 |  | KAZAKHSTAN | (Astana a) |  | President Elbashy Nursultan Nazarbayev | | |
 |  | LAOS | (Vientiane) |  | Boungnang Vorachith | | |
 |  | SRI LANKA | (Sri Jayewardenepura Kotte al + Colombo ejnr + Kandy r) |  | President Maithripala Sirisena | | |
 |  | MYANMAR | (Naypyidaw a + Rangoon bn) |  | President Win Myint | | |
 |  | MONGOLIA | (Ulan-Bator) |  | President Khaltmaagiin Battulga | | |
 |  | MALAYSIA | (Putrajaya aj + Kuala Lumpur ejlry) |  | Sultan Muhammad V. Faris Petra | | |
 |  | OMAN | (Muscat) |  | Sultan Qaboos bin Said | | |
 |  | PHILIPPINES | (Manila acr + Quezon City b + Pasay City b) |  | President Rodrigo Duterte | | |
 |  | PAKISTAN | (Islamabad) |  | President Mamnoon Hussain | | |
 |  | QATAR | (Doha) |  | Emir Sheikh Tamim bin Hamad Al Thani | | |
 |  | RUSSIA | (Moscow a + Saint Petersburg d) |  | President Vladimir Putin |  | |
 |  | SAUDI ARABIA | (Riyadh) |  | King Salman | | |
 |  | SINGAPORE | (Singapore) |  | President Halimah Yacob | | |
 |  | THAILAND | (Bangkok) |  | King Rama X. Vajiralongkorn | | |
 |  | TAJIKISTAN | (Dushanbe) |  | President Emomali Rakhmonov | | |
 |  | UZBEKISTAN | (Tashkent a) |  | Shavkat Mirziyayev | | |
 |  | VIETNAM | (Hanoi) |  | Nguyen Phu Trong | | |
