| Place | Post Code |
|---|---|
| Barriada La Esperanza, San Carlos | None |
| Buena Vista, San Carlos | None |
| Campo Alegre, San Carlos | None |
| La Montañuela, San Carlos | None |
| Las Marias, San Carlos | None |
| Nuevo San Carlitos, San Carlos | None |
| Paso Piñas, San Carlos | None |
| Pueblo Nuevo, San Carlos | None |
| Sábana Bonita, San Carlos | None |
| San Carlitos, San Carlos | None |
| San Carlos, San Carlos | None |