42 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. ] :
| | AUSTRIA | (Vienna) | | President Theodor Koerner | | |
| | BELGIUM | (Brussels) | | King Baudoin I | | |
| | BULGARIA | (Sofia) | | Todor Zhivkov | | |
| | BYELORUSSIA | (Minsk) | | Nikolai Patolichev | | |
| | SWITZERLAND | (Berne lq + Lausanne j) | | President Rodolphe Rubattel | | |
| | CHILE | (Santiago of Chile a + Valparaiso l + Vina del Mar s) | | President Carlos Ibanez del Campo | | |
| | CUBA | (Havana) | | Fulgencio Batista | | |
| | WEST GERMANY | (Bonn ar + Karlsruhe d) | | Bundespresident Theodor Heuss | | |
| | DENMARK | (Copenhagen) | | King Frederick IX | | |
| | ECUADOR | (San Francisco of Quito) | | President Jose Maria Velasco Ibarra | | |
| | EGYPT | (Cairo a + Alexandria r) | | Muhammad Naguib | | |
| | SPAIN | (Madrid) | | Caudillo Francisco Franco | | |
| | FRENCH UNION | (Paris) | | President Rene Coty | | |
| | GUATEMALA | (Guatemala City) | | Carlos Castillo Armas | | |
| | HUNGARY | (Budapest a) | | Matyas Rakosi | | |
| | 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 Luigi Einaudi | | |
| | JORDAN | (Amman) | | King Hussein I | | |
| | JAPAN | (Tokyo) | | Emperor Hirohito | | |
| | LEBANON | (Beirut a) | | President Camille Chamoun | | |
| | LIECHTENSTEIN | (Vaduz) | | Prince Franz Joseph II | | |
| | LIBERIA | (Monrovia) | | President William Tubman | | |
| | LUXEMBOURG | (Luxembourg a) | | Grand Duchess Charlotte | | |
| | MONACO | (Monaco q) | | Prince Rainier III | | |
| | MEXICO | (Mexico City) | | President Adolfo Ruiz Cortines | | |
| | NICARAGUA | (Managua) | | President Anastasio Somoza Garcia | | |
| | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) | | Queen Juliana | | |
| | NORWAY | (Oslo) | | King Haakon VII | | |
| | PHILIPPINES | (Quezon City a + Manila l + Baguio City s) | | President Ramon Magsaysay | | |
| | PAKISTAN | (Karachi) | | Ghulam Muhammad | | |
| | POLAND | (Warsaw a) | | Boleslaw Bierut | | |
| | RUMANIA | (Bucharest) | | Gheorghe Apostol | | |
| | SWEDEN | (Stockholm) | | King Gustav VI Adolphe | | |
| | SAN MARINO | (San Marino) | | Captains Regent | | |
| | EL SALVADOR | (San Salvador) | | President Oscar Osorio | | |
| | SYRIA | (Damascus) | | President Hashim al-Atassi | | |
| | THAILAND | (Bangkok) | | King Rama IX Bhumibol Adulyadej | | |
| | TURKEY | (Ankara a) | | President Celal Bayar | | |
| | UKRAINE | (Kiev) | | Aleksey Kirichenko | | |
| | HOLY SEE | (Vatican City) | | Pope Pius XII | | |
| | SOUTH AFRICA | (Pretoria ae + Cape Town l) | | Queen Elizabeth II | | |