Guatuso is a canton in the Alajuela province of Costa Rica.
It is named for the region's original inhabitants, an indigenous tribe whose survivors are now known as the Maleku and remain as residents of the area.
Guatuso was created on 17 March 1970 by decree 4541.
Guatuso has an area of and a mean elevation of metres.
It is a diamond-shaped canton, with the Purgatorio River and the FrÃÂo River as the northeast border, the Cucaracha River as a portion of the southeast border, the Cordillera de Guanacaste on the southwest border, and the Rito River and the Mónico River on the northwest. Tenorio Volcano marks the far western point of the canton.
The canton of Guatuso is subdivided into the following districts:
For the 2011 census, Guatuso had a population of inhabitants.
The canton is covered by the following road routes: