Uswetakeiyawa Postal Code
| City | Postal Code | District |
|---|---|---|
| Ja-Ela | 11350 | Gampaha |
| Nivandama | 11354 | Gampaha |
| Makewita | 11358 | Gampaha |
| Pamunugama | 11370 | Gampaha |
| Ekala | 11380 | Gampaha |
| Kotugoda | 11390 | Gampaha |
| Raddolugama | 11400 | Gampaha |
| Seeduwa | 11410 | Gampaha |
| Katunayake IPZ | 11420 | Gampaha |
| Katunayake Air Force Camp | 11440 | Gampaha |
| Katunayake | 11450 | Gampaha |
| Negambo | 11500 | Gampaha |
| Talahena | 11504 | Gampaha |
| Kimbulapitiya | 11522 | Gampaha |
| Dagonna | 11524 | Gampaha |