Aserrí is the sixth canton in the San José province of Costa Rica. The head city of the canton is the homonymous Aserrí. Aserrí takes its na…Aserrí is the sixth canton in the San José province of Costa Rica. The head city of the canton is the homonymous Aserrí. Aserrí takes its name from a Huetar tribe, also called the Accerri. Aserrí has an area of 168.26 km² and a mean elevation of 1,373 m.