62 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. ] :
| | NETHERLANDS ANTILLES | (Willemstad) | | Queen Juliana | | |
| | ARGENTINE | (Buenos Aires a + Olivos r) | | President Arturo Frondizi | | |
| | AUSTRIA | (Vienna) | | President Adolf Schaerf | | |
| | AUSTRALIA | (Canberra) | | Queen Elizabeth II | | |
| | BELGIUM | (Brussels) | | King Baudoin I | | |
| | 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 | | |
| | COLOMBIA | (Bogota) | | President Alberto Lleras Camargo | | |
| | COSTA RICA | (San Jose) | | President Mario Echandi Jimenez | | |
| | CUBA | (Havana a + Santiago of Cuba g) | | Anselmo Alliegro y Mila | | |
| | WEST GERMANY | (Bonn ar + Karlsruhe d) | | Bundespresident Theodor Heuss | | |
| | DENMARK | (Copenhagen) | | King Frederick IX | | |
| | DOMINICAN | (Ciudad Trujillo) | | Generalissimo Rafael Leonidas Trujillo | | |
| | 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 | | |
| | FRANCE | (Paris) | | President Rene Coty | | |
| | GHANA | (Accra) | | Queen Elizabeth II | | |
| | GREECE | (Athens a) | | King Paul I | | |
| | GUATEMALA | (Guatemala City) | | President Miguel Ydigoras Fuentes | | |
| | HAITI | (Port Au Prince) | | President Francois Duvalier Papa Doc | | |
| | INDONESIA | (Jakarta a + Bogor r + Chipanas r + Jogjakarta r + Tampaksiring r) | | President Ahmad Sukarno | | |
| | IRELAND | (Dublin) | | President Sean Thomas O´Kelly | | |
| | ISRAEL | (West Jerusalem qu + Tel Aviv-Jaffa in) | | President Yitzhak Ben-Zvi | | |
| | INDIA | (New Delhi a + Simla s + Bolarum w) | | President Rajendra Prasad | | |
| | IRAN | (Tehran) | | Mohammad Reza Shah Pahlavi | | |
| | ITALY | (Rome a) | | President Giovanni Gronchi | | |
| | JORDAN | (Amman) | | King Hussein I | | |
| | JAPAN | (Tokyo) | | Emperor Hirohito | | |
| | CAMBODIA | (Phnom Penh) | | King Norodom Suramarit | | |
| | LAOS | (Vientiane a + Luangphrabang r) | | King Sisavang Vong | | |
| | LEBANON | (Beirut a + Baabda r) | | President Fuad Chehab | | |
| | CEYLON | (Colombo a + Kandy r) | | Queen Elizabeth II | | |
| | LIBERIA | (Monrovia) | | President William Tubman | | |
| | LUXEMBOURG | (Luxembourg a) | | Grand Duchess Charlotte | | |
| | LIBYA | (Tripoli a + Benghazi a + El Beida by + Tobruk b) | | King Idris I | | |
| | MOROCCO | (Rabat a + Tangier s) | | King Muhammad V | | |
| | MONACO | (Monaco q) | | Prince Rainier III | | |
| | BURMA | (Rangoon a) | | President Win Maung | | |
| | MEXICO | (Mexico City) | | President Adolfo Lopez Mateos | | |
| | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) | | Queen Juliana | | |
| | NORWAY | (Oslo) | | King Olav V | | |
| | NEW ZEALAND | (Wellington) | | Queen Elizabeth II | | |
| | PANAMA | (Panama City) | | President Ernesto de la Guardia | | |
| | 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 a) | | General Ibrahim Abboud | | |
| | SWEDEN | (Stockholm) | | King Gustav VI Adolphe | | |
| | SURINAM | (Paramaribo) | | Queen Juliana | | |
| | THAILAND | (Bangkok) | | King Rama IX Bhumibol Adulyadej | | |
| | TUNISIA | (Tunis) | | President Habib Bourguiba | | |
| | 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 | | |
| | YUGOSLAVIA | (Belgrade) | | President Josip Broz Tito | | |