Santo Domingo is a canton in the Heredia province of Costa Rica. The head city of the canton is the homonymous Santo Domingo district.
Santo Domingo was created on 28 September 1869 by decree 9.
Santo Domingo has an area of km<sup>2</sup> and a mean elevation of metres.
The Virilla River on the south and the Bermúdez River on the north establish the boundaries of this elongated province, which then climb up into the Cordillera Central (Central Mountain Range) with the Pará Blanca River.
The canton of Santo Domingo is subdivided into the following districts:
For the 2011 census, Santo Domingo had a population of inhabitants.
The canton is covered by the following road routes:
The Interurbano Line operated by Incofer goes through this canton.