21 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) | | President Jose Figueroa Alcorta | | |
| | BOLIVIA | (Sucre cj + La Paz eir) | | President Eliodoro Villazon | | |
| | BRAZIL | (Rio de Janeiro) | | President Nilo Pecanha | | |
| | CHILI | (Santiago of Chili a + Valparaiso ls) | | VP Elias Fernandez Albano | | |
| | COLOMBIA | (Bogota) | | President Carlos Eugenio Restrepo | | |
| | COSTA RICA | (San Jose) | | President Ricardo Jimenez Oreamuno | | |
| | CUBA | (Havana) | | President Jose Miguel Gomez | | |
| | DOMINICAN | (Santo Domingo) | | President Ramon Caceres | | |
| | ECUADOR | (San Francisco of Quito) | | President Eloy Alfaro | | |
| | GUATEMALA | (Guatemala City) | | President Manuel Jose Estrada | | |
| | HONDURAS | (Tegucigalpa) | | President Miguel Rafael Davila | | |
| | HAYTI | (Port Au Prince) | | President Francois Antoine Simon | | |
| | MEXICO | (Mexico City) | | President Porfirio Diaz | | |
| | NICARAGUA | (Managua) | | General Jose Dolores Estrada Morales | | |
| | PANAMA | (Panama City) | | Carlos Antonio Mendoza | | |
| | PERU | (Lima) | | President Augusto Leguia | | |
| | PARAGUAY | (Assumption) | | Emiliano Gonzalez Navero | | |
| | SALVADOR | (San Salvador) | | President Fernando Figueroa | | |
| | AMERICA | (Washington-District of Columbia) | | President William Howard Taft | | |
| | URUGUAY | (Montevideo) | | President Claudio Williman | | |
| | VENEZUELA | (Caracas) | | President Juan Vicente Gomez | | |