46 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 | | |
| | AUSTRIA | (Vienna) | | President Wilhelm Miklas | | |
| | 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 Washington Luiz | | |
| | SWITZERLAND | (Berne lq + Lausanne j) | | President Robert Haab | | |
| | CHILE | (Santiago of Chile a + Valparaiso l + Vina del Mar s) | | President Carlos Ibanez del Campo | | |
| | COLOMBIA | (Bogota) | | President Miguel Abadia Mendez | | |
| | CZECHOSLOVAKIA | (Prague a + Lany s) | | President Tomas Garrigue Masaryk | | |
| | 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 Lazaro Chacon Gonzalez | | |
| | 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 Hirohito | | |
| | LUXEMBURG | (Luxembourg a) | | Grand Duchess Charlotte | | |
| | MEXICO | (Mexico City) | | President Emilio Portes Gil | | |
| | NICARAGUA | (Managua) | | President Jose Maria Moncada | | |
| | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) | | Queen Wilhelmina | | |
| | NORWAY | (Oslo) | | King Haakon VII | | |
| | PANAMA | (Panama City) | | President Florencio Harmodio Arosemena | | |
| | PERU | (Lima) | | President Augusto Leguia | | |
| | POLAND | (Warsaw a) | | Jozef Pilsudski | | |
| | PORTUGAL | (Lisbon) | | President Oscar Carmona | | |
| | PARAGUAY | (Assumption) | | President Jose Patricio Guggiari | | |
| | RUMANIA | (Bucharest) | | King Michael I | | |
| | SWEDEN | (Stockholm) | | King Gustav V | | |
| | EL SALVADOR | (San Salvador) | | President Don Pio Romero Bosque | | |
| | SIAM | (Bangkok) | | King Rama VII Prajadhipok | | |
| | TURKEY | (Angora a) | | President Mustafa Kemal Pasha | | |
| | CHINA | (Nanking a) | | Chiang Kai-Shek | | |
| | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | King George V | | |
| | AMERICA | (Washington-District of Columbia) | | President Herbert Hoover | | |
| | URUGUAY | (Montevideo) | | President Juan Campisteguy | | |
| | VENEZUELA | (Caracas) | | President Juan Bautista Perez | | |
| | JUGO-SLAVIA | (Belgrade) | | King Alexander I. the Unifier Karageorgevich | | |