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. ] :
 |  | EMIRATES | (Abu Dhabi ar) |  | President Sheikh Muhammad bin Zayed Al Nahyan |  | |
 |  | ANGOLA | (Luanda) |  | President Joao Manuel Goncalves Lourenco |  | |
 |  | AZERBAIJAN | (Baku) |  | President Iham Aliyev |  | |
 |  | BAHRAIN | (Manamah a + Sakhir r) |  | King Sheikh Hamad bin Isa Al Khalifah |  | |
 |  | BRUNEI DARUSSALAM | (Bandar Seri Begawan) |  | Sultan Hassanal Bolkiah |  | |
 |  | CONGO-BRAZZAVILLE | (Brazzaville a + Pointe Noire n) |  | President Denis Sassou-Nguesso |  | |
 |  | ALGERIA | (Algiers a + El Biar d + El Mouradia r) |  | State President Abdelmadjid Tebboune |  | |
 |  | GABON | (Libreville) |  | President Ali Ben Bongo Ondimba |  | |
 |  | EQUATORIAL GUINEA | (City of Peace fl + Malabo a) |  | President Teodoro Obiang Nguema Mbasogo |  | |
 |  | IRAQ | (Baghdad a + Kerbala y + Najaf y) |  | President Barham Salih |  | |
 |  | IRAN | (Tehran a + Qum y) |  | Supreme Leader Ayatollah Ali Khamenei |  | |
 |  | KUWAIT | (Kuwait City a + Bayan lr) |  | Emir Sheikh Nawaf Al Ahmad Al Jabir Al Sabah |  | |
 |  | KAZAKHSTAN | (Nur-Sultan a) |  | President Kasym-Zhomart Tokayev |  | |
 |  | LIBYA | (Tripoli a) |  | Muhammad Younus Al-Menfi |  | |
 |  | MEXICO | (Mexico City) |  | President Andres Manuel Lopez Obrador |  | |
 |  | MALAYSIA | (Putrajaya aj + Kuala Lumpur ejklnry) |  | Sultan Abdullah Shah |  | |
 |  | NIGERIA | (Abuja a + Lagos kmn) |  | President Muhammadu Buhari |  | |
 |  | OMAN | (Muscat) |  | Sultan Haitham bin Tarik |  | |
 |  | RUSSIA | (Moscow a + Saint Petersburg d + Sochi s + Valdai s) |  | President Vladimir Putin |  | |
 |  | SAUDI ARABIA | (Riyadh a + Mecca y) |  | King Salman |  | |
 |  | SUDAN | (Khartoum a) |  | General Abdel-Fatah al-Burhan Abdelrahman |  | |
 |  | SOUTH SUDAN | (Juba a + Ramshiel f) |  | President Salva Kiir Mayardit |  | |
 |  | VENEZUELA | (Caracas) |  | President Nicolas Maduro |  | |