| Place |
Post Code |
| Mahal Loluwa, Dompe |
None |
| Mahawalawatta, Dompe |
None |
| Mailawalana, Dompe |
None |
| Mailawalana South, Dompe |
None |
| Malinda, Dompe |
None |
| Malinda East, Dompe |
None |
| Malwana, Dompe |
11670 |
| Mandawala North, Dompe |
11061 |
| Mandawala South, Dompe |
11061 |
| Maryland Colony, Dompe |
None |
| Mawatha, Dompe |
None |
| Meddegama, Dompe |
None |
| Meddegama North, Dompe |
None |
| Meddegama South, Dompe |
None |
| Meegahawatta, Dompe |
None |
| Meethirigala, Dompe |
None |
| Meniklanda, Dompe |
None |
| Millathe, Dompe |
None |
| Morahena, Dompe |
None |
| Nakandapola, Dompe |
None |
| Namaluwa, Dompe |
None |
| Nandarama Pedesa, Dompe |
None |
| Narampola, Dompe |
None |
| Nedungolla, Dompe |
None |
| Nedungolla South, Dompe |
None |
| Nikawala, Dompe |
None |
| All postal codes in Gampaha |
| Attanagalla, Gampaha |
| Biyagama, Gampaha |
| Divulapitiya, Gampaha |
| Dompe, Gampaha |
| Gampaha, Gampaha |
| Ja-Ela, Gampaha |
| Katana, Gampaha |
| Kelaniya, Gampaha |
| Mahara, Gampaha |
| Minuwangoda, Gampaha |
| Mirigama, Gampaha |
| Negombo, Gampaha |
| Wattala, Gampaha |