43 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) | | Emperor Charles I | | |
| | BELGIUM | (Saint Adresse x + The Panne g) | | King Albert I | | |
| | BULGARIA | (Sofia) | | Tsar Boris III the Unifier | | |
| | BOLIVIA | (Sucre cj + La Paz eir) | | President Jose Gutierrez | | |
| | BRAZIL | (Rio de Janeiro) | | President Venceslau Bras | | |
| | CANADA | (Ottawa) | | King George V | | |
| | SWITZERLAND | (Berne lq + Lausanne j) | | President Felix Louis Calonder | | |
| | CHILI | (Santiago of Chili a + Valparaiso ls) | | President Juan Luis Sanfuentes | | |
| | COSTA RICA | (San Jose) | | President Federico Alberto Tinoco Granados | | |
| | CUBA | (Havana) | | President Mario Garcia Menocal | | |
| | GERMANY | (Berlin a) | | Chancellor Friedrich Ebert | | |
| | DENMARK | (Copenhagen) | | King Christian X | | |
| | EGYPT | (Cairo a + Alexandria r) | | Sultan Ahmad Fuad | | |
| | SPAIN | (Madrid) | | King Alfonso XII | | |
| | WHITE RUSSIA | (Omsk) | | Vasily Boldyrev | | |
| | FRANCE | (Paris) | | President Raymond Poincare | | |
| | GREECE | (Athens a) | | King Alexander I | | |
| | HAYTI | (Port Au Prince) | | President Philippe Sudre Dartiguenave | | |
| | INDIA | (Delhi a + Simla s) | | Viceroy Frederic Thesiger | | |
| | PERSIA | (Tehran) | | Soltan Ahmad Shah Kajar | | |
| | ITALY | (Rome a) | | King Victor Emmanuel III | | |
| | JAPAN | (Tokyo) | | Emperor Yoshihito | | |
| | LUXEMBURG | (Luxembourg a) | | Grand Duchess Marie-Adelaide | | |
| | MONACO | (Monaco q) | | Prince Albert I | | |
| | NICARAGUA | (Managua) | | President Emiliano Chamorro | | |
| | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) | | Queen Wilhelmina | | |
| | NORWAY | (Christiania) | | King Haakon VII | | |
| | PANAMA | (Panama City) | | President Belisario Porras Barahona | | |
| | PERU | (Lima) | | President Jose Pardo y Barreda | | |
| | PORTUGAL | (Lisbon) | | President Sidonio Pais | | |
| | RUMANIA | (Jassy mr) | | King Ferdinand I | | |
| | SERBIA | (Belgrade) | | Regent Prince Alexander Karageorgevich | | |
| | SWEDEN | (Stockholm) | | King Gustav V | | |
| | SOVIET RUSSIA | (Moscow) | | Vladimir Ilich Lenin | | |
| | CITY OF TANGIER | (Tangier) | | | | |
| | SIAM | (Bangkok) | | King Rama VI Vajiravudh | | |
| | TUNISIA | (Tunis) | | Muhammad V. An-Nasir Bey | | |
| | OTTOMAN TURKEY | (Constantinople a) | | 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 | | |
| | FRENCH INDOCHINA | (Hanoi) | | | | |