The following are the zip codes in the municipalities and cities of Western Samar.
| Region | Provinces | City/Municipality | Zip Code |
| Region 8 (Eastern Visayas) | Western Samar | Almagro | 6724 |
| Region 8 (Eastern Visayas) | Western Samar | Basey | 6720 |
| Region 8 (Eastern Visayas) | Western Samar | Calbayog City | 6710 |
| Region 8 (Eastern Visayas) | Western Samar | Calbiga | 6715 |
| Region 8 (Eastern Visayas) | Western Samar | Catbalogan | 6700 |
| Region 8 (Eastern Visayas) | Western Samar | Daram | 6722 |
| Region 8 (Eastern Visayas) | Western Samar | Gandara | 6706 |
| Region 8 (Eastern Visayas) | Western Samar | Hinbangan | 6713 |
| Region 8 (Eastern Visayas) | Western Samar | Jiabong | 6701 |
| Region 8 (Eastern Visayas) | Western Samar | Marabut | 6721 |
| Region 8 (Eastern Visayas) | Western Samar | Matuguinao | 6708 |
| Region 8 (Eastern Visayas) | Western Samar | Motiong | 6702 |
| Region 8 (Eastern Visayas) | Western Samar | Pagsanjan | 6705 |
| Region 8 (Eastern Visayas) | Western Samar | Pinabacdao | 6716 |
| Region 8 (Eastern Visayas) | Western Samar | San Jorge | 6707 |
| Region 8 (Eastern Visayas) | Western Samar | San Jose de Bauan | 6723 |
| Region 8 (Eastern Visayas) | Western Samar | San Sebastian | 6714 |
| Region 8 (Eastern Visayas) | Western Samar | Sta. Margarita | 6709 |
| Region 8 (Eastern Visayas) | Western Samar | Sta. Rita | 6718 |
| Region 8 (Eastern Visayas) | Western Samar | Sto. Nino | 6711 |
| Region 8 (Eastern Visayas) | Western Samar | Tagapulan | 6712 |
| Region 8 (Eastern Visayas) | Western Samar | Talarora | 6719 |
| Region 8 (Eastern Visayas) | Western Samar | Tarangnan | 6704 |
| Region 8 (Eastern Visayas) | Western Samar | Villareal | 6717 |
| Region 8 (Eastern Visayas) | Western Samar | Wright | 6703 |
| Region 8 (Eastern Visayas) | Western Samar | Zumarraga | 6725 |
