40 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 | | |
 |  | BRAZIL | (Rio de Janeiro a + Brasilia f) |  | President Juscelino Kubitschek | | |
 |  | CANADA | (Ottawa) | | Queen Elizabeth II |  | |
 |  | SWITZERLAND | (Berne lq + Lausanne j) |  | President Paul Chaudet | | |
 |  | CHILE | (Santiago of Chile a + Valparaiso l + Vina del Mar s) |  | President Jorge Alessandri | | |
 |  | CZECHOSLOVAKIA | (Prague a) |  | Antonin Novotny | | |
 |  | WEST GERMANY | (Bonn ar + Karlsruhe d) |  | Bundespresident Theodor Heuss | | |
 |  | DENMARK | (Copenhagen) |  | King Frederick IX | | |
 |  | DOMINICAN | (Ciudad Trujillo) |  | Generalissimo Rafael Leonidas Trujillo | | |
 |  | ECUADOR | (San Francisco of Quito) |  | President Camilo Ponce Enriquez | | |
 |  | SPAIN | (Madrid) |  | Caudillo Francisco Franco | | |
 |  | FINLAND | (Helsinki a + Kultaranta s) |  | President Urho Kekkonen | | |
 |  | FRANCE | (Paris) |  | President Rene Coty | | |
 |  | HUNGARY | (Budapest a) |  | Janos Kadar | | |
 |  | IRELAND | (Dublin) |  | President Sean Thomas O´Kelly | | |
 |  | INDIA | (New Delhi a + Simla s + Bolarum w) |  | President Rajendra Prasad |  | |
 |  | ITALY | (Rome a) |  | President Giovanni Gronchi | | |
 |  | JAPAN | (Tokyo) |  | Emperor Hirohito | | |
 |  | SOUTH KOREA | (Seoul a) |  | President Syngman Rhee | | |
 |  | MEXICO | (Mexico City) |  | President Adolfo Lopez Mateos | | |
 |  | NICARAGUA | (Managua) |  | President Luis Somoza Debayle | | |
 |  | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) |  | Queen Juliana | | |
 |  | NORWAY | (Oslo) |  | King Olav V | | |
 |  | PERU | (Lima) |  | President Manuel Prado Ugarteche | | |
 |  | POLAND | (Warsaw a) |  | Wladyslaw Gomulka | | |
 |  | PORTUGAL | (Lisbon) |  | President Americo Thomaz | | |
 |  | RUMANIA | (Bucharest) |  | Gheorghe Gheorghiu-Dej | | |
 |  | SWEDEN | (Stockholm) |  | King Gustav VI Adolphe | | |
 |  | SOVIET UNION | (Moscow) |  | Nikita Khrushchev | | |
 |  | EL SALVADOR | (San Salvador) |  | President Jose Maria Lemus | | |
 |  | THAILAND | (Bangkok) |  | King Rama IX Bhumibol Adulyadej | | |
 |  | TURKEY | (Ankara a) |  | President Celal Bayar | | |
 |  | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | Queen Elizabeth II | | |
 |  | AMERICA | (Washington-District of Columbia) |  | President Dwight David Eisenhower | | |
 |  | URUGUAY | (Montevideo) |  | President Carlos Fischer | | |
 |  | VENEZUELA | (Caracas) |  | Edgar Sanabria | | |
