Ratmalana Postal Code
| City | Postal Code | District |
|---|---|---|
| Moratuwa | 10400 | Colombo |
| Padukka | 10500 | Colombo |
| Horagala | 10502 | Colombo |
| Meegoda | 10504 | Colombo |
| Kahawala | 10508 | Colombo |
| Watareka | 10511 | Colombo |
| Batawala | 10513 | Colombo |
| Bope | 10522 | Colombo |
| Handapangoda | 10524 | Colombo |
| Batugampola | 10526 | Colombo |
| Kolonnawa | 10600 | Colombo |
| Mulleriyawa | 10620 | Colombo |
| Angoda | 10620 | Colombo |
| Kaduwela | 10640 | Colombo |
| Hanwella | 10650 | Colombo |