54 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. ] :
 |  | AFGHANISTAN | (Kabul) |  | King Mohammad Zahir Shah |  | |
 |  | ARGENTINE | (Buenos Aires a + Olivos r) |  | President Arturo Frondizi |  | |
 |  | AUSTRIA | (Vienna) |  | President Adolf Schaerf |  | |
 |  | BELGIUM | (Brussels) |  | King Baudoin I | | |
 |  | BULGARIA | (Sofia) |  | Todor Zhivkov | | |
 |  | BRAZIL | (Brasilia) |  | President Juscelino Kubitschek | | |
 |  | COLOMBIA | (Bogota) |  | President Alberto Lleras Camargo | | |
 |  | COSTA RICA | (San Jose) |  | President Mario Echandi Jimenez |  | |
 |  | CUBA | (Havana) |  | President Osvaldo Dorticos Torrado | | |
 |  | WEST GERMANY | (Bonn ar + Karlsruhe d) |  | Bundespresident Heinrich Luebke | | |
 |  | DENMARK | (Copenhagen) |  | King Frederick IX | | |
 |  | ECUADOR | (San Francisco of Quito) |  | President Camilo Ponce Enriquez | | |
 |  | UNITED ARAB | (Cairo a + Alexandria r) |  | President Gamal Abdel Nasser |  | |
 |  | SPAIN | (Madrid) |  | Caudillo Francisco Franco | | |
 |  | ETHIOPIA-ERITREA | (Addis Ababa) |  | Emperor Ras Tafari Haile Selassie I | | |
 |  | FINLAND | (Helsinki a + Kultaranta s) |  | President Urho Kekkonen | | |
 |  | GHANA | (Accra) |  | President Kwame Nkrumah | | |
 |  | GUINEA | (Conakry) |  | President Ahmed Sekou Toure | | |
 |  | GREECE | (Athens a) |  | King Paul I | | |
 |  | GUATEMALA | (Guatemala City) |  | President Miguel Ydigoras Fuentes | | |
 |  | HONDURAS | (Tegucigalpa a + Comayaguela c) |  | President Ramon Villeda Morales | | |
 |  | HAITI | (Port Au Prince) |  | President Francois Duvalier Papa Doc | | |
 |  | INDONESIA | (Jakarta a + Bogor r + Chipanas r + Jogjakarta r + Tampaksiring r) |  | President Ahmad Sukarno | | |
 |  | INDIA | (New Delhi a + Simla s + Bolarum w) |  | President Rajendra Prasad | | |
 |  | IRELAND | (Dublin) |  | President Eamon de Valera | | |
 |  | IRAQ | (Baghdad) |  | Muhammad Najib Al-Rubai | | |
 |  | ITALY | (Rome a) |  | President Giovanni Gronchi | | |
 |  | JAPAN | (Tokyo) |  | Emperor Hirohito | | |
 |  | LAOS | (Vientiane a + Luangphrabang r) |  | King Savang Vatthana | | |
 |  | CEYLON | (Colombo a + Kandy r) |  | Queen Elizabeth II | | |
 |  | LUXEMBOURG | (Luxembourg a) |  | Grand Duchess Charlotte | | |
 |  | MOROCCO | (Rabat a) |  | King Muhammad V | | |
 |  | BURMA | (Rangoon a) |  | President Win Maung | | |
 |  | MEXICO | (Mexico City) |  | President Adolfo Lopez Mateos | | |
 |  | MALAYA | (Kuala Lumpur) |  | Tuanku Hisamuddin Alam Shah ibni al-Marhum Sultan Alaeddin Sulaiman Shah | | |
 |  | NICARAGUA | (Managua) |  | President Luis Somoza Debayle | | |
 |  | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) |  | Queen Juliana | | |
 |  | NORWAY | (Oslo) |  | King Olav V | | |
 |  | NEPAL | (Kathmandu) |  | Maharajah Mahendra Bir Bikram Shah Dev | | |
 |  | PERU | (Lima) |  | President Manuel Prado Ugarteche | | |
 |  | PHILIPPINES | (Quezon City a + Manila l + Baguio City s) |  | President Carlos Garcia | | |
 |  | PAKISTAN | (Karachi a + Rawalpindi t) |  | President Mohammad Ayub Khan | | |
 |  | PORTUGAL | (Lisbon) |  | President Americo Thomaz | | |
 |  | SAUDI ARABIA | (Riyadh) |  | King Saud | | |
 |  | SUDAN | (Khartoum) |  | General Ibrahim Abboud | | |
 |  | SWEDEN | (Stockholm) |  | King Gustav VI Adolphe | | |
 |  | SOVIET UNION | (Moscow) |  | Nikita Khrushchev | | |
 |  | NORTHERN REGION | (Damascus) |  | | | |
 |  | THAILAND | (Bangkok) |  | King Rama IX Bhumibol Adulyadej | | |
 |  | TUNISIA | (Tunis) |  | President Habib Bourguiba | | |
 |  | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | Queen Elizabeth II | | |
 |  | VENEZUELA | (Caracas) |  | President Romulo Betancourt | | |
 |  | YEMEN | (Taiz) |  | Imam and King Ahmad IV ash-Shams | | |
 |  | YUGOSLAVIA | (Belgrade) |  | President Josip Broz Tito | | |
