Dagonna Postal Code
| City | Postal Code | District |
|---|---|---|
| Katuwellegama | 11526 | Gampaha |
| Thimbirigaskatuwa | 11532 | Gampaha |
| Katana | 11534 | Gampaha |
| Akaragama | 11536 | Gampaha |
| Badalgama | 11538 | Gampaha |
| Kochchikade | 11540 | Gampaha |
| Minuwangoda | 11550 | Gampaha |
| Andiambalama | 11558 | Gampaha |
| Wegowwa | 11562 | Gampaha |
| Horampella | 11564 | Gampaha |
| Yatiyana | 11566 | Gampaha |
| Hinatiyana Madawala | 11568 | Gampaha |
| Kelaniya | 11600 | Gampaha |
| Kiribathgoda | 11601 | Gampaha |
| Siyambalape | 11607 | Gampaha |