30 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-HUNGARY | (Vienna ar + Budapest a) | | Emperor Charles I | | |
| | ARGENTINE | (Buenos Ayres a) | | President Hipolito Yrigoyen | | |
| | BELGIUM-IN-EXILE | (Saint Adresse x + The Panne g) | | King Albert I | | |
| | BULGARIA | (Sofia) | | Tsar Ferdinand I | | |
| | CANADA | (Ottawa) | | King George V | | |
| | SWITZERLAND | (Berne lq + Lausanne j) | | President Edmund Schulthess | | |
| | CHILI | (Santiago of Chili a + Valparaiso ls) | | President Juan Luis Sanfuentes | | |
| | SERBIA-IN-EXILE | (Corcyra) | | King Peter I. Karageorgevich | | |
| | GERMANY | (Berlin a) | | Emperor William II | | |
| | DENMARK | (Copenhagen) | | King Christian X | | |
| | ECUADOR | (San Francisco of Quito) | | President Alfredo Baquerizo Moreno | | |
| | SPAIN | (Madrid) | | King Alfonso XII | | |
| | WHITE RUSSIA | (Novorossiysk) | | General Mikhail Alexeyev | | |
| | FRANCE | (Paris) | | President Raymond Poincare | | |
| | ITALY | (Rome a) | | King Victor Emmanuel III | | |
| | JAPAN | (Tokyo) | | Emperor Yoshihito | | |
| | MEXICO | (Mexico City) | | President Venustiano Carranza | | |
| | NICARAGUA | (Managua) | | President Emiliano Chamorro | | |
| | NORWAY | (Christiania) | | King Haakon VII | | |
| | PERU | (Lima) | | President Jose Pardo y Barreda | | |
| | PORTUGAL | (Lisbon) | | President Bernardino Machado | | |
| | RUMANIA | (Jassy mr) | | King Ferdinand I | | |
| | SWEDEN | (Stockholm) | | King Gustav V | | |
| | EL SALVADOR | (San Salvador) | | President Carlos Melendez | | |
| | SIAM | (Bangkok) | | King Rama VI Vajiravudh | | |
| | OTTOMAN TURKEY | (Constantinople a) | | Sultan Mehmet V. Reshat Gazi | | |
| | 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 | | |