The political and administrative division of Costa Rica is defined by provinces, such as: San José, Alajuela, Cartago, Heredia, Guanacaste, Puntarenas and Limón. These provinces at the same time are divided in cantons and districts. In the administrative aspect, the province of Puntarenas has the following cantons: Puntarenas, Esparza, Buenos Aires, Montes de Oro, Osa, Aguirre, Golfito, Coto Brus, Parrita, Corredores and Garabito.  

Buenos Aires

It is the canton number III of the province of Puntarenas. It was created by the law No. 185 in July 29th in 1940. Surface: 2.382.61 square kilometers. The main city of the canton is Buenos Aires.