| Place | Post Code |
|---|---|
| Baganito, Kawayan | 6545 |
| Balacson, Kawayan | 6545 |
| Balite, Kawayan | 6545 |
| Bilwang, Kawayan | 6545 |
| Bulalacao, Kawayan | 6545 |
| Burabod, Kawayan | 6545 |
| Buyo, Kawayan | 6545 |
| Inasuyan, Kawayan | 6545 |
| Kansanok, Kawayan | 6545 |
| Mada-O, Kawayan | 6545 |
| Mapuyo, Kawayan | 6545 |
| Masagaosao, Kawayan | 6545 |
| Masagongsong, Kawayan | 6545 |
| Poblacion, Kawayan | 6545 |
| San Lorenzo, Kawayan | 6545 |
| Tabunan North, Kawayan | 6545 |
| Tubig Guinoo, Kawayan | 6545 |
| Tucdao, Kawayan | 6545 |
| Ungale, Kawayan | 6545 |
| Villa Cornejo, Kawayan | 6545 |
| All postal codes in Biliran | |
|---|---|
| Almeria, Biliran | |
| Biliran, Biliran | |
| Cabucgayan, Biliran | |
| Caibiran, Biliran | |
| Culaba, Biliran | |
| Kawayan, Biliran | |
| Maripipi, Biliran | |
| Naval, Biliran | |