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