45 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 Marcelo Torcuato de Alvear | | |
| | AUSTRIA | (Vienna) | | President Michael Hainisch | | |
| | BELGIUM | (Brussels) | | King Albert I | | |
| | BULGARIA | (Sofia) | | Tsar Boris III the Unifier | | |
| | BOLIVIA | (Sucre cj + La Paz eir) | | President Hernando Siles Reyes | | |
| | BRAZIL | (Rio de Janeiro) | | President Artur Bernardes | | |
| | SWITZERLAND | (Berne lq + Lausanne j) | | President Heinrich Haeberlin | | |
| | CHILE | (Santiago of Chile a + Valparaiso ls) | | President Emiliano Figueroa | | |
| | COLOMBIA | (Bogota) | | President Miguel Abadia Mendez | | |
| | CUBA | (Havana) | | President Gerardo Machado | | |
| | GERMANY | (Berlin a) | | Reichpresident Paul von Hindenburg | | |
| | DENMARK | (Copenhagen) | | King Christian X | | |
| | DOMINICAN | (Santo Domingo) | | President Horacio Vasquez | | |
| | ECUADOR | (San Francisco of Quito) | | President Isidro Ayora | | |
| | SPAIN | (Madrid) | | King Alfonso XII | | |
| | FINLAND | (Helsinki a + Kultaranta s) | | President Lauri Kristian Relander | | |
| | FRANCE | (Paris) | | Frederic Francois-Marsal | | |
| | GREECE | (Athens a) | | President Pavlos Theodorou Koundouriotis | | |
| | GUATEMALA | (Guatemala City) | | President Jose Maria Orellana | | |
| | HAYTI | (Port Au Prince) | | President Louis Borno | | |
| | HUNGARY | (Budapest a) | | Regent Miklos Horthy de Nagybanya | | |
| | PERSIA | (Tehran) | | Reza Shah Pahlavi the Great | | |
| | ITALY | (Rome a) | | King Victor Emmanuel III | | |
| | JAPAN | (Tokyo) | | Emperor Yoshihito | | |
| | LUXEMBURG | (Luxembourg a) | | Grand Duchess Charlotte | | |
| | MEXICO | (Mexico City) | | President Plutarco Elias Calles | | |
| | NICARAGUA | (Managua) | | Emiliano Chamorro | | |
| | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) | | Queen Wilhelmina | | |
| | NORWAY | (Oslo) | | King Haakon VII | | |
| | PANAMA | (Panama City) | | President Rodolfo Chiari | | |
| | PERU | (Lima) | | President Augusto Leguia | | |
| | POLAND | (Warsaw a) | | Jozef Pilsudski | | |
| | PORTUGAL | (Lisbon) | | President Oscar Carmona | | |
| | PARAGUAY | (Assumption) | | President Eligio Ayala | | |
| | CHINA | (Shanghai) | | Tu Hsi-Kuei | | |
| | RUMANIA | (Bucharest) | | King Ferdinand I | | |
| | SWEDEN | (Stockholm) | | King Gustav V | | |
| | EL SALVADOR | (San Salvador) | | President Alfonso Quinonez Molina | | |
| | SIAM | (Bangkok) | | King Rama VII Prajadhipok | | |
| | TURKEY | (Angora a) | | President Mustafa Kemal Pasha | | |
| | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | King George V | | |
| | AMERICA | (Washington-District of Columbia) | | President Calvin Coolidge | | |
| | URUGUAY | (Montevideo) | | President Jose Serrato | | |
| | VENEZUELA | (Caracas) | | President Juan Vicente Gomez | | |
| | JUGO-SLAVIA | (Belgrade) | | King Alexander I. the Unifier Karageorgevich | | |