Kottawa Postal Code
| City | Postal Code | District |
|---|---|---|
| Hiripitya | 10232 | Colombo |
| Embuldeniya | 10250 | Colombo |
| Kohuwala | 10250 | Colombo |
| Gongodawila | 10250 | Colombo |
| Nugegoda | 10250 | Colombo |
| Wijerama | 10250 | Colombo |
| Maharagama | 10280 | Colombo |
| Boralesgamuwa | 10290 | Colombo |
| Piliyandala | 10300 | Colombo |
| Deltara | 10302 | Colombo |
| Siddamulla | 10304 | Colombo |
| Madapatha | 10306 | Colombo |
| Polgasowita | 10320 | Colombo |
| Kalubowila | 10350 | Colombo |
| Dehiwala | 10350 | Colombo |