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 | | |
| | AUSTRIA | (Vienna) | | President Adolf Schaerf | | |
| | AUSTRALIA | (Canberra) | | Queen Elizabeth II | | |
| | BELGIUM | (Brussels) | | King Baudoin I | | |
| | BULGARIA | (Sofia) | | Todor Zhivkov | | |
| | CANADA | (Ottawa) | | Queen Elizabeth II | | |
| | SWITZERLAND | (Berne lq + Lausanne j) | | President Paul Chaudet | | |
| | CZECHOSLOVAKIA | (Prague a) | | Antonin Novotny | | |
| | CUBA | (Havana) | | President Manuel Urrutia Lleo | | |
| | WEST GERMANY | (Bonn ar + Karlsruhe d) | | Bundespresident Theodor Heuss | | |
| | DENMARK | (Copenhagen) | | King Frederick IX | | |
| | 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 | | |
| | GUINEA | (Conakry) | | President Ahmed Sekou Toure | | |
| | GREECE | (Athens a) | | King Paul I | | |
| | HUNGARY | (Budapest a) | | Janos Kadar | | |
| | IRELAND | (Dublin) | | President Sean Thomas O´Kelly | | |
| | ISRAEL | (West Jerusalem qu + Tel Aviv-Jaffa i) | | President Yitzhak Ben-Zvi | | |
| | INDIA | (New Delhi a + Simla s + Bolarum w) | | President Rajendra Prasad | | |
| | ITALY | (Rome a) | | President Giovanni Gronchi | | |
| | JORDAN | (Amman) | | King Hussein I | | |
| | JAPAN | (Tokyo) | | Emperor Hirohito | | |
| | SOUTH KOREA | (Seoul a) | | President Syngman Rhee | | |
| | MOROCCO | (Rabat a + Tangier s) | | King Muhammad V | | |
| | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) | | Queen Juliana | | |
| | NORWAY | (Oslo) | | King Olav V | | |
| | NEW ZEALAND | (Wellington) | | Queen Elizabeth II | | |
| | POLAND | (Warsaw a) | | Wladyslaw Gomulka | | |
| | RUMANIA | (Bucharest) | | Gheorghe Gheorghiu-Dej | | |
| | SAUDI ARABIA | (Riyadh) | | King Saud | | |
| | SUDAN | (Khartoum) | | General Ibrahim Abboud | | |
| | SWEDEN | (Stockholm) | | King Gustav VI Adolphe | | |
| | SOVIET UNION | (Moscow) | | Nikita Khrushchev | | |
| | TUNISIA | (Tunis) | | President Habib Bourguiba | | |
| | TURKEY | (Ankara a) | | President Celal Bayar | | |
| | 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 Dwight David Eisenhower | | |
| | YUGOSLAVIA | (Belgrade) | | President Josip Broz Tito | | |