32 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 Wilhelm Miklas | | |
| | BELGIUM | (Brussels) | | King Albert I | | |
| | BULGARIA | (Sofia) | | Tsar Boris III the Unifier | | |
| | SWITZERLAND | (Berne lq + Lausanne j) | | President Edmund Schulthess | | |
| | COLOMBIA | (Bogota) | | President Alfredo Olaya Herrera | | |
| | CZECHOSLOVAKIA | (Prague a + Lany s) | | President Tomas Garrigue Masaryk | | |
| | DENMARK | (Copenhagen) | | King Christian X | | |
| | ESTHONIA | (Tallinn a + Tartu b) | | Konstantin Pats | | |
| | EGYPT | (Cairo a + Alexandria r) | | King Fuad I | | |
| | SPAIN | (Madrid) | | President Niceto Alcala-Zamora y Torres | | |
| | FINLAND | (Helsinki a + Kultaranta s) | | President Pehr Evind Svinhufvud | | |
| | FRANCE | (Paris) | | President Albert Lebrun | | |
| | GREECE | (Athens a) | | President Alexandros Zaimis | | |
| | HUNGARY | (Budapest a) | | Regent Miklos Horthy de Nagybanya | | |
| | NETHERLANDS EAST INDIES | (Batavia a + Buitenzorg r + Chipanas r) | | | | |
| | IRELAND | (Dublin) | | Donal Buckley | | |
| | PERSIA | (Tehran) | | Reza Shah Pahlavi the Great | | |
| | ITALY | (Rome a) | | King Victor Emmanuel III | | |
| | JAPAN | (Tokyo) | | Emperor Hirohito | | |
| | LATVIA | (Riga) | | State President Alberts Kviesis | | |
| | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) | | Queen Wilhelmina | | |
| | NORWAY | (Oslo) | | King Haakon VII | | |
| | PANAMA | (Panama City) | | President Harmodio Arias Madrid | | |
| | PHILIPPINE ISLANDS | (Manila a + Baguio City s) | | | | |
| | POLAND | (Warsaw a) | | Jozef Pilsudski | | |
| | RUMANIA | (Bucharest) | | King Carol II | | |
| | SWEDEN | (Stockholm) | | King Gustav V | | |
| | TURKEY | (Ankara a) | | President Mustafa Kemal Pasha | | |
| | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | King George V | | |
| | AMERICA | (Washington-District of Columbia) | | President Herbert Hoover | | |
| | URUGUAY | (Montevideo) | | President Gabriel Terra | | |
| | YUGOSLAVIA | (Belgrade) | | King Alexander I. the Unifier Karageorgevich | | |