| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Almirante Brown, O'Higgins | H3701 XAI |
| Postal/ZIP Codes in Fortin Totoralita Lugar Histor, O'Higgins | H3701 XAL |
| Postal/ZIP Codes in La Chaco, O'Higgins | H3701 XAF |
| Postal/ZIP Codes in La Clotilde, O'Higgins | H3725 |
| Postal/ZIP Codes in La Tigra, O'Higgins | H3701 |
| Postal/ZIP Codes in Las Cuatro Bocas, O'Higgins | H3701 XAG |
| Postal/ZIP Codes in Lote 10, O'Higgins | H3701 XAH |
| Postal/ZIP Codes in Lote 11, O'Higgins | H3701 XAJ |
| Postal/ZIP Codes in Malbalaes, O'Higgins | H3701 XAC, H3701 XAE |
| Postal/ZIP Codes in Pampa de Las Flores, O'Higgins | H3701 XAK |
| Postal/ZIP Codes in San Bernardo, O'Higgins | H3726 |