Gampaha Postal Code
| City | Postal Code | District |
|---|---|---|
| Ragama | 11010 | Gampaha |
| Batuwatta | 11011 | Gampaha |
| Walpola | 11012 | Gampaha |
| Ganemulla | 11020 | Gampaha |
| Bollete | 11024 | Gampaha |
| Udugampola | 11030 | Gampaha |
| Madelgamuwa | 11033 | Gampaha |
| IhalaUggalboda | 11034 | Gampaha |
| Bemmulla | 11040 | Gampaha |
| Pethiyagoda | 11043 | Gampaha |
| Korase | 11044 | Gampaha |
| Ambagaspitiya | 11052 | Gampaha |
| Udathuththiripitiya | 11054 | Gampaha |
| Mudungoda | 11056 | Gampaha |
| Mandawala | 11061 | Gampaha |