| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Calera, Onzaga | 682519 |
| Postal/ZIP Codes in La Chorrera, Onzaga | 682527 |
| Postal/ZIP Codes in Los Molinos, Onzaga | 682527 |
| Postal/ZIP Codes in Onzaga, Onzaga | 682521, 682529 |
| Postal/ZIP Codes in Palmar, Onzaga | 682519 |
| Postal/ZIP Codes in Tequita, Onzaga | 682528 |