| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Cerrillos, Rengo | 2940000 |
| Postal/ZIP Codes in El Retiro, Rengo | 2940000 |
| Postal/ZIP Codes in Esmeralda, Rengo | 2940000 |
| Postal/ZIP Codes in La Chimba, Rengo | 2940000 |
| Postal/ZIP Codes in Lo Cartagena, Rengo | 2940000 |
| Postal/ZIP Codes in Lo De Lobo, Rengo | 2940000 |
| Postal/ZIP Codes in Los Choapinos, Rengo | 2940000 |
| Postal/ZIP Codes in Los Gomeros, Rengo | 2940000 |
| Postal/ZIP Codes in Popeta, Rengo | 2940000 |
| Postal/ZIP Codes in Pueblo Hundido, Rengo | 2940000 |
| Postal/ZIP Codes in Rengo, Rengo | 2940000 |
| Postal/ZIP Codes in Rosario, Rengo | 2940000 |