24 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. ] :
| | ANDORRA | (Andorra The Old a + (La Seu d´Urgell) ry) | | Ramon Malla Call | | |
| | ARGENTINE | (Buenos Aires a + Olivos r) | | President Roberto Marcelo Levingston | | |
| | BOLIVIA | (Sucre cj + La Paz eir) | | President Juan Jose Torres | | |
| | BRAZIL | (Brasilia) | | President Emilio Garrastazu Medici | | |
| | CHILE | (Santiago of Chile a + Valparaiso l + Vina del Mar s) | | President Salvador Allende | | |
| | COLOMBIA | (Bogota) | | President Misael Pastrana Borrero | | |
| | COSTA RICA | (San Jose) | | President Jose Figueres Ferrer | | |
| | CUBA | (Havana) | | Supreme Leader Fidel Castro | | |
| | DOMINICAN | (Santo Domingo de Guzman) | | President Joaquin Balaguer | | |
| | ECUADOR | (San Francisco of Quito) | | President Jose Maria Velasco Ibarra | | |
| | SPAIN | (Madrid) | | Caudillo Francisco Franco | | |
| | EQUATORIAL GUINEA | (Santa Isabel a) | | President Francisco Macias Nguema | | |
| | GUATEMALA | (Guatemala City) | | President Carlos Manuel Arana Osorio | | |
| | HONDURAS | (Tegucigalpa a + Comayaguela c) | | President Oswaldo Lopez Arellano | | |
| | MEXICO | (Mexico City) | | President Luis Echeverria Alvarez | | |
| | NICARAGUA | (Managua) | | President Anastasio Somoza Debayle | | |
| | PANAMA | (Panama City) | | General Omar Torrijos Herrera | | |
| | PERU | (Lima) | | President Juan Velasco Alvarado | | |
| | PUERTO RICO | (San Juan Puerto Rico) | | President Richard Nixon | | |
| | PORTUGAL | (Lisbon) | | President Americo Thomaz | | |
| | PARAGUAY | (Assumption) | | President Alfredo Stroessner | | |
| | EL SALVADOR | (San Salvador) | | President Fidel Sanchez Hernandez | | |
| | URUGUAY | (Montevideo) | | President Jorge Pacheco Areco | | |
| | VENEZUELA | (Caracas) | | President Rafael Caldera | | |