| All postal codes in San Carlos |
| Aguas Zarcas, San Carlos |
| Buenavista, San Carlos |
| Cutris, San Carlos |
| Florencia, San Carlos |
| La Fortuna, San Carlos |
| La Palmera, San Carlos |
| La Tigra, San Carlos |
| Monterrey, San Carlos |
| Pital, San Carlos |
| Pocosol, San Carlos |
| Quesada, San Carlos |
| Venado, San Carlos |
| Venecia, San Carlos |