Aserrí is the sixth canton in the San José province of Costa Rica.

It encompasses a narrow strip of land that traverses the Coastal Mountain Range before reaching the lowlands of Puntarenas Province, bordering the canton of Parrita.

According to Costa Rica's Municipal Code, mayors are elected every four years by the population of the canton.

[6] As of the latest municipal elections in 2024, the National Liberation Party candidate, Patricia Mayela Porras Segura, was elected mayor of the canton with 23.75% of the votes, with Carlos Alberto Azofeifa Aguilar and Jesús Benito Morales Calderón as first and second vice mayors, respectively.

[6] The current president of the Municipal Council is the Social Christian Unity Party member, Sonia Aguilar Zamora, with National Liberation Party member, Alex Antonio Calero Lopez, as vice president.