| Place | Post Code |
|---|---|
| Mehiella North, Mallawapitiya | None |
| Mehiella South, Mallawapitiya | None |
| Messagammana, Mallawapitiya | None |
| Millawa, Mallawapitiya | None |
| Morathenna, Mallawapitiya | None |
| Naranpola, Mallawapitiya | None |
| Pahala Gattuwana, Mallawapitiya | None |
| Pillawa, Mallawapitiya | None |
| Ranawana, Mallawapitiya | None |
| Thiragama, Mallawapitiya | None |
| Thorayaya, Mallawapitiya | None |
| Udagama, Mallawapitiya | None |
| Uyandana, Mallawapitiya | None |
| Walpolakanda North, Mallawapitiya | None |
| Walpolakanda South, Mallawapitiya | None |
| Wattegedara, Mallawapitiya | None |
| Werawella, Mallawapitiya | None |
| Yakgahapitiya, Mallawapitiya | None |