San Isidro is a district of the Grecia canton, in the Alajuela province of Costa Rica.

San Isidro has an area of 17.01 km2[3] and an elevation of 1,290 metres.

[1] It is located on the slopes of Poás Volcano.

For the 2011 census, San Isidro had a population of 5,949 inhabitants.

[6] The district is covered by the following road routes: This Costa Rican location article is a stub.