| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Cunaco, Nancagua | 3110000 |
| Postal/ZIP Codes in Nancagua, Nancagua | 3110000 |
| Postal/ZIP Codes in Puquillay Alto, Nancagua | 3110000 |
| Postal/ZIP Codes in Puquillay Bajo, Nancagua | 3110000 |
| Postal/ZIP Codes in San Gregorio, Nancagua | 3110000 |