| Official Name: | San Isidro |
| Settlement Type: | Barrio |
| Pushpin Map: | Puerto Rico |
| Coordinates: | 18.3474°N -65.2367°W |
| Coordinates Footnotes: | [1] |
| Subdivision Type: | Commonwealth |
| Subdivision Name: |  Puerto Rico |
| Subdivision Type1: | Municipality |
| Subdivision Name1: | Culebra |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 25.62 |
| Area Land Sq Mi: | 2.26 |
| Area Water Sq Mi: | 23.36 |
| Population As Of: | 2010 |
| Population Note: | Source: 2010 Census |
| Population Total: | 16 |
| Population Density Sq Mi: | 7.1 |
| Timezone: | AST |
| Utc Offset: | -4 |
| Elevation Ft: | 0 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 00775 |
San Isidro is a barrio in the island-municipality of Culebra, Puerto Rico. Its population in 2010 was 16.[2] [3] [4]
It consists of a part of the island of Culebra in the northeast, and of islands and islets such as Roca Speck, Cayo Norte, Cayo Sombrerito, Cayos Geniquí, Cayo Tiburón, and Cayo Ballena.