| Place | Post Code |
|---|---|
| Arenal, San Carlos | None |
| Colón, San Carlos | None |
| Costa Esmeralda, San Carlos | None |
| Dos Hermanas, San Carlos | None |
| El Nance, San Carlos | None |
| El Palmar, San Carlos | None |
| El Rodeo, San Carlos | None |
| El Veladero, San Carlos | None |
| Lago Mar, San Carlos | None |
| Mata Palo, San Carlos | None |
| Punta Ratón, San Carlos | None |
| Río Mar, San Carlos | None |
| San Carlos, San Carlos | None |
| Santa Teresita, San Carlos | None |
| Tranquillas, San Carlos | None |
| Vista Mar, San Carlos | None |