According to the Territorial Administrative Division, the cantons of Costa Rica are subdivided into 492 districts (distritos), each of which has a unique five-digit postal code.
The District Council is the interlocutor between the district and the municipal government and ensures the communal and neighborhood interests before the Municipal Council;.
However, the direct administration of the district falls to the municipality; the District Councils also exercise administrative functions such as forwarding projects to the Council and supervising the mayor's work.
Postal codes in Costa Rica are five-digit numeric, and were introduced in March 2007; they are associated with and identify a unique district.
[2] The numbers are the same as used by the Instituto Nacional de Estadística y Censos (INEC).