Santo Domingo is the third canton in the province of Heredia in Costa Rica. The canton covers an area of 24.84 km², and has a population of 36,899. The capital city of the canton is also called Santo Domingo.
The Río Virilla on the south and the Río Bermúdez on the north establish the boundaries of this elongated province, which then climb up into the Cordillera Central (Central Mountain Range) with the Río Pará Blanca.
The canton of Santo Domingo is subdivided into 8 distritos (districts).
The canton was established by a government resolution of October 28, 1856.
Coordinates: 9°59′N 84°05′W / 9.983°N 84.083°W