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 Ayres a + Olivos b) | | President Hipolito Yrigoyen | | |
| | GERMAN-AUSTRIA | (Vienna) | | Directory | | |
| | BELGIUM | (Brussels) | | King Albert I | | |
| | BULGARIA | (Sofia) | | Tsar Boris III the Unifier | | |
| | BRAZIL | (Rio de Janeiro) | | President Francisco de Paula Rodrigues Alves | | |
| | SWITZERLAND | (Berne lq + Lausanne j) | | President Felix Louis Calonder | | |
| | CHILI | (Santiago of Chili a + Valparaiso ls) | | President Juan Luis Sanfuentes | | |
| | CUBA | (Havana) | | President Mario Garcia Menocal | | |
| | PRUSSIA | (Berlin) | | | | |
| | MECKLENBURG-SCHWERIN | (Schwerin in Mecklenburg) | | | | |
| | HESSE | (Darmstadt) | | | | |
| | BADEN | (Carlsruhe) | | | | |
| | WURTTEMBERG | (Stuttgart) | | | | |
| | DENMARK | (Copenhagen) | | King Christian X | | |
| | BAVARIA | (Munich) | | | | |
| | SAXONY | (Dresden) | | Robert Richard Lipinski | | |
| | SPAIN | (Madrid) | | King Alfonso XII | | |
| | FRANCE | (Paris) | | President Raymond Poincare | | |
| | GREECE | (Athens a) | | King Alexander I | | |
| | HAMBURG | (Hamburg) | | Heinrich Laufenberg | | |
| | HUNGARY | (Budapest a) | | PM Count Mihaly Karolyi de Nagykaroly | | |
| | ITALY | (Rome a) | | King Victor Emmanuel III | | |
| | JAPAN | (Tokyo) | | Emperor Yoshihito | | |
| | LUXEMBURG | (Luxembourg a) | | Grand Duchess Marie-Adelaide | | |
| | MONTENEGRO | (Cetinje) | | Dragutin Milutinovich | | |
| | MEXICO | (Mexico City) | | President Venustiano Carranza | | |
| | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) | | Queen Wilhelmina | | |
| | NORWAY | (Christiania) | | King Haakon VII | | |
| | OLDENBURG-EAST FRISIA | (Oldenburg) | | | | |
| | PERU | (Lima) | | President Jose Pardo y Barreda | | |
| | PORTUGAL | (Lisbon) | | President Sidonio Pais | | |
| | CHINA | (Peking) | | President Hsu Shih-Chang | | |
| | RUMANIA | (Jassy mr) | | King Ferdinand I | | |
| | SERBIA | (Belgrade) | | Regent Prince Alexander Karageorgevich | | |
| | SWEDEN | (Stockholm) | | King Gustav V | | |
| | SOVIET RUSSIA | (Moscow) | | Vladimir Ilich Lenin | | |
| | OTTOMAN TURKEY | ((Constantinople)) | | Sultan Mehmet VI Vahidettin | | |
| | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | King George V | | |
| | AMERICA | (Washington-District of Columbia) | | President Woodrow Wilson | | |
| | URUGUAY | (Montevideo) | | President Feliciano Viera | | |
| | VENEZUELA | (Caracas) | | President Victorino Marquez Bustillos | | |