19 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 Aires a + Olivos r) | | President Agustin Pedro Justo | | |
| | BRAZIL | (Rio de Janeiro) | | Getulio Vargas | | |
| | CHILE | (Santiago of Chile a + Valparaiso l + Vina del Mar s) | | President Arturo Alessandri Palma | | |
| | COLOMBIA | (Bogota) | | President Alfredo Olaya Herrera | | |
| | COSTA RICA | (San Jose) | | President Ricardo Jimenez Oreamuno | | |
| | CUBA | (Havana) | | President Gerardo Machado | | |
| | DOMINICAN | (Santo Domingo-Ciudad Trujillo) | | President Generalissimo Rafael Leonidas Trujillo | | |
| | GUATEMALA | (Guatemala City) | | President Jorge Ubico | | |
| | HONDURAS | (Tegucigalpa) | | President Tiburcio Carias Andino | | |
| | HAYTI | (Port Au Prince) | | President Stenio Vincent | | |
| | MEXICO | (Mexico City) | | Abelardo Lujan Rodriguez | | |
| | NICARAGUA | (Managua) | | President Juan Bautista Sacasa | | |
| | PANAMA | (Panama City) | | President Harmodio Arias Madrid | | |
| | PERU | (Lima) | | President Oscar Raymundo Benavides | | |
| | PARAGUAY | (Assumption) | | President Eusebio Ayala | | |
| | EL SALVADOR | (San Salvador) | | President Maximiliano Hernandez Martinez | | |
| | AMERICA | (Washington-District of Columbia) | | President Franklin Delano Roosevelt | | |
| | URUGUAY | (Montevideo) | | President Gabriel Terra | | |
| | VENEZUELA | (Caracas) | | President Juan Vicente Gomez | | |