Demalagama Postal Code
| City | Postal Code | District |
|---|---|---|
| Delgoda | 11700 | Gampaha |
| Weliveriya | 11710 | Gampaha |
| Henegama | 11715 | Gampaha |
| Buthpitiya | 11720 | Gampaha |
| Wathurugama | 11724 | Gampaha |
| Radawana | 11725 | Gampaha |
| Kirindiwela | 11730 | Gampaha |
| Hiswella | 11734 | Gampaha |
| Pepiliyawala | 11741 | Gampaha |
| Mithirigala | 11742 | Gampaha |
| Peliyagoda | 11830 | Gampaha |
| Kadawatha | 11850 | Gampaha |
| Mahara | 11851 | Gampaha |
| Imbulgoda | 11856 | Gampaha |
| Weboda | 11858 | Gampaha |