Grecia is a canton in the Alajuela province of Costa Rica.

[citation needed] Grecia was created on 27 July 1867 by decree 20.

[3] Grecia has an area of 141.52 km²[4] and a mean elevation of 1,025 metres.

[2] The canton lies among ridges and valleys on the southwestern slope of Poas Volcano.

Known as Río Cuarto, this area lies on the Caribbean Plain, it was a district of Grecia, but became a canton in 2018.