Poás is a canton in the Alajuela province of Costa Rica. The head city of the canton is San Pedro. Toponymy Named for Poás Volcano. History Poás was created on 15 October 1901 by decree 14. Geography Poás has an area of km² and a mean elevation of metres. The elongated canton sits among the ridges and valleys on the southern slope of Poás Volcano. The Poás and Poasito rivers form its eastern border, while the Prendes and Tacares rivers limit the canton to the west. Poás Volcano is the canton's northernmost point. Districts The canton of Poás is subdivided into the following districts: San Pedro San Juan San Rafael Carrillos Sabana Redonda Demographics For the 2011 census, Poás had a population of inhabitants. Transportation Road transportation The canton is covered by the following road routes: References Cantons of Alajuela Province Populated places in Alajuela Province