San Isidro, also referred to as San Isidro de Heredia, is a canton in the Heredia province of Costa Rica. The head city is in San Isidro district.
San Isidro was created on 13 July 1905 by decree 40.
San Isidro has an area of and a mean elevation of metres.
The canton is in the highlands northeast of the provincial capital city of Heredia. The Pará Blanca River forms its far northeastern border.
The canton of San Isidro is subdivided into the following districts:
For the 2011 census, San Isidro had a population of inhabitants.
The canton is covered by the following road routes: