18 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 Julio Argentino Roca | | |
| | BOLIVIA | (Sucre cj + La Paz eir) | | President Jose Manuel Pando | | |
| | BRAZIL | (Rio de Janeiro) | | President Manuel Ferraz de Campos Sales | | |
| | CHILI | (Santiago of Chili a + Valparaiso ls) | | President Federico Errazuriz Echaurren | | |
| | COLOMBIA | (Bogota) | | President Manuel Antonio Sanclemente | | |
| | COSTA RICA | (San Jose) | | President Rafael Yglesias Castro | | |
| | ECUADOR | (San Francisco of Quito) | | President Eloy Alfaro | | |
| | GUATEMALA | (Guatemala City) | | President Manuel Jose Estrada | | |
| | HONDURAS | (Tegucigalpa) | | President Terencio Sierra Romero | | |
| | HAYTI | (Port Au Prince) | | President Tiresias Simon-Sam | | |
| | MEXICO | (Mexico City) | | President Porfirio Diaz | | |
| | NICARAGUA | (Managua) | | President Jose Santos Zelaya | | |
| | PERU | (Lima) | | President Eduardo Lopez de Romana | | |
| | PARAGUAY | (Assumption) | | President Emilio Aceval | | |
| | SALVADOR | (San Salvador) | | President Tomas Regalado | | |
| | AMERICA | (Washington-District of Columbia) | | President William McKinley | | |
| | URUGUAY | (Montevideo) | | President Juan Lindolfo Cuestas | | |
| | VENEZUELA | (Caracas) | | Cipriano Castro | | |