Sarapiquí is the tenth canton in the province of Heredia in Costa Rica. The canton covers an area of 2,140.54 km², and has a population of 49,327. The capital city of the canton is Puerto Viejo.
The canton includes the major portion of the Sarapiquí region, and is named for its major waterway, the Sarapiquí River, which forms the canton's eastern border. The western half of the canton gives way to the San Carlos Plain (Llanura de San Carlos). Heredia's provincial border with Alajuela, which runs through the middle of the San Carlos Plain, marks the canton's western limit. The southern boundary of the canton is established by the Río Virgen (Virgin River).
The canton of Sarapiquí is subdivided into 5 distritos (districts).
The canton was established by law on November 18, 1970.
Coordinates: 10°27′28″N 84°00′23″W / 10.45778°N 84.00639°W