| All postal codes in Mahaxay |
| Dang, Mahaxay |
| Kava, Mahaxay |
| Khamfuang, Mahaxay |
| Mahaxai, Mahaxay |
| Mai, Mahaxay |
| Nadou, Mahaxay |
| Naphakeo, Mahaxay |
| Nasae, Mahaxay |
| Panam, Mahaxay |
| Phonmuang, Mahaxay |
| Phonnadi, Mahaxay |
| Phonsa-at, Mahaxay |
| Sangphok, Mahaxay |
| Veun, Mahaxay |