41 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. ] :
| | ARGENTINE | (Buenos Aires a + Olivos r) | | President Arturo Frondizi | | |
| | AUSTRALIA | (Canberra) | | Queen Elizabeth II | | |
| | BRAZIL | (Brasilia) | | President Joao Goulart | | |
| | CANADA | (Ottawa) | | Queen Elizabeth II | | |
| | CHILE | (Santiago of Chile a + Valparaiso l + Vina del Mar s) | | President Jorge Alessandri | | |
| | CUBA | (Havana) | | Supreme Leader Fidel Castro | | |
| | WEST GERMANY | (Bonn ar + Karlsruhe d) | | Bundespresident Heinrich Luebke | | |
| | DENMARK | (Copenhagen) | | King Frederick IX | | |
| | DOMINICAN | (Santo Domingo de Guzman) | | President Joaquin Balaguer | | |
| | UNITED ARAB | (Cairo a + Alexandria r) | | President Gamal Abdel Nasser | | |
| | SPAIN | (Madrid) | | Caudillo Francisco Franco | | |
| | FINLAND | (Helsinki a + Kultaranta s) | | President Urho Kekkonen | | |
| | FRANCE | (Paris) | | President Charles de Gaulle | | |
| | GREECE | (Athens a) | | King Paul I | | |
| | GUATEMALA | (Guatemala City) | | President Miguel Ydigoras Fuentes | | |
| | 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 | | |
| | IRAN | (Tehran) | | Mohammad Reza Shah Pahlavi | | |
| | ICELAND | (Reykjavik a + Alftanes r) | | President Asgeir Asgeirsson | | |
| | ITALY | (Rome a) | | President Giovanni Gronchi | | |
| | JAPAN | (Tokyo) | | Emperor Hirohito | | |
| | SOUTH KOREA | (Seoul a) | | President Yun Po-Sun | | |
| | MONACO | (Monaco q) | | Prince Rainier III | | |
| | BURMA | (Rangoon a) | | President Win Maung | | |
| | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) | | Queen Juliana | | |
| | NORWAY | (Oslo) | | King Olav V | | |
| | NEW ZEALAND | (Wellington) | | Queen Elizabeth II | | |
| | PHILIPPINES | (Quezon City a + Manila l + Baguio City s) | | President Carlos Garcia | | |
| | PAKISTAN | (Rawalpindi t + Karachi b) | | President Mohammad Ayub Khan | | |
| | POLAND | (Warsaw a) | | Wladyslaw Gomulka | | |
| | PORTUGAL | (Lisbon) | | President Americo Thomaz | | |
| | SWEDEN | (Stockholm) | | King Gustav VI Adolphe | | |
| | THAILAND | (Bangkok) | | King Rama IX Bhumibol Adulyadej | | |
| | TURKEY | (Ankara a) | | President Cemal Gursel | | |
| | CHINA-FORMOSA | (Taipeh t) | | President Chiang Kai-Shek | | |
| | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | Queen Elizabeth II | | |
| | AMERICA | (Washington-District of Columbia) | | President John Fitzgerald Kennedy | | |
| | URUGUAY | (Montevideo) | | President Eduardo Victor Haedo | | |
| | VENEZUELA | (Caracas) | | President Romulo Betancourt | | |
| | YUGOSLAVIA | (Belgrade) | | President Josip Broz Tito | | |
| | SOUTH AFRICA | (Pretoria ae + Cape Town l + Bloemfontein j) | | State President Charles Robberts Swart | | |