Tirrases is a district of the Curridabat canton, in the San José province of Costa Rica.

Tirrases also has a public high school called Colegio Técnico Profesional Uladislao Gámez Solano (Fund 2006).

This high school is located at the Catholic Church of Las Mercedes and had a population of 60 students in 2007.

The health services are provided by the EBAIS (Equipo Básico de Atención Integral en Salud) located at Hacienda Vieja, 200 north and 25 east from the Liceo de Curridabat.

As per the official statements domestic violence is the most common security issue, but non-official data shows that drugs and gang warfare are the main problems in this zone.