Gampaha Postal Codes
| City | Postal Code | City | Postal Code |
|---|---|---|---|
| Akaragama | 11536 | Alawala | 11122 |
| Ambagaspitiya | 11052 | Ambepussa | 11212 |
| Andiambalama | 11558 | Attanagalla | 11120 |
| Badalgama | 11538 | Banduragoda | 11244 |
| Batuwatta | 11011 | Bemmulla | 11040 |
| Biyagama | 11650 | Biyagama EPZ | 11672 |
| Bokalagama | 11216 | Bollete | 11024 |
| Bopagama | 11134 | Buthpitiya | 11720 |
| Dagonna | 11524 | Danowita | 11896 |
| Debahera | 11889 | Dekatana | 11690 |
| Delgoda | 11700 | Delwagura | 11228 |
| Demalagama | 11692 | Demanhandiya | 11270 |
| Dewalapola | 11102 | Divulapitiya | 11250 |
| Divuldeniya | 11208 | Dompe | 11680 |
| Dunagaha | 11264 | Ekala | 11380 |
| Ellakkala | 11116 | Essella | 11108 |
| Gampaha | 11000 | Ganemulla | 11020 |
| Gonawala | 11630 | Gongitota | 11315 |
| Heiyanthuduwa | 11618 | Hendala | 11307 |
| Henegama | 11715 | Hinatiyana Madawala | 11568 |
| Hiswella | 11734 | Horampella | 11564 |
| Hunumulla | 11262 | Hunupitiya | 11311 |
| Ihala Madampella | 11265 | IhalaUggalboda | 11034 |
| Imbulgoda | 11856 | Ja-Ela | 11350 |
| Kadawatha | 11850 | Kahatowita | 11144 |
| Kalagedihena | 11875 | Kaleliya | 11160 |
| Kaluaggala | 11224 | Kandana | 11320 |
| Kapugoda | 10662 | Katana | 11534 |
| Katunayake | 11450 | Katunayake Air Force Camp | 11440 |
| Katunayake IPZ | 11420 | Katuwellegama | 11526 |
| Kelaniya | 11600 | Kimbulapitiya | 11522 |
| Kiribathgoda | 11601 | Kirindiwela | 11730 |
| Kitalawalana | 11206 | Kitulwala | 11242 |
| Kochchikade | 11540 | Korase | 11044 |
| Kotadeniyawa | 11232 | Kotugoda | 11390 |
| Kumbaloluwa | 11105 | Loluwagoda | 11204 |
| Lunugama | 11062 | Mabodale | 11114 |
| Mabola | 11305 | Madelgamuwa | 11033 |
| Mahara | 11851 | Makewita | 11358 |
| Makola | 11640 | Malwana | 11670 |
| Mandawala | 11061 | Marandagahamula | 11260 |
| Mellawagedara | 11234 | Minuwangoda | 11550 |
| Mirigama | 11200 | Mithirigala | 11742 |
| Muddaragama | 11112 | Mudungoda | 11056 |
| Naranwala | 11063 | Nawana | 11222 |
| Nedungamuwa | 11066 | Negambo | 11500 |
| Nikahetikanda | 11128 | Nittambuwa | 11880 |
| Nivandama | 11354 | Pallewela | 11150 |
| Pamunugama | 11370 | Pamunuwatta | 11214 |
| Pasyala | 11890 | Peliyagoda | 11830 |
| Pepiliyawala | 11741 | Pethiyagoda | 11043 |
| Polpithimukulana | 11324 | Pugoda | 10660 |
| Radawadunna | 11892 | Radawana | 11725 |
| Raddolugama | 11400 | Ragama | 11010 |
| Rukgahavila | 11142 | Rukmale | 11129 |
| Seeduwa | 11410 | Siyambalape | 11607 |
| Talahena | 11504 | Thimbirigaskatuwa | 11532 |
| Tittapattara | 10664 | Udathuththiripitiya | 11054 |
| Udugampola | 11030 | Urapola | 11126 |
| Uswetakeiyawa | 11328 | Veyangoda | 11100 |
| Walgammulla | 11146 | Walpita | 11226 |
| Walpola | 11012 | Wanaluwawa | 11068 |
| Wathurugama | 11724 | Watinapaha | 11104 |
| Wattala | 11300 | Wattala Market Junction | 11301 |
| Weboda | 11858 | Wegowwa | 11562 |
| Weliveriya | 11710 | Weweldeniya | 11894 |
| Yakkala | 11870 | Yatiyana | 11566 |