| Place | Post Code |
|---|---|
| Houaykasack, Pakbak | 06000 |
| Houaylanong, Pakbak | 06000 |
| Houaysathanh, Pakbak | 06000 |
| Kengkoung, Pakbak | 06000 |
| Kengpet, Pakbak | 06000 |
| Khornvai, Pakbak | 06000 |
| Kok, Pakbak | 06000 |
| Longkang, Pakbak | 06000 |
| Longluerk, Pakbak | 06000 |
| Makgnan, Pakbak | 06000 |
| Makkampang, Pakbak | 06000 |
| Makkha, Pakbak | 06000 |
| Pakbak, Pakbak | 06000 |
| Pakming, Pakbak | 06000 |
| Pakphaen, Pakbak | 06000 |
| Pakpong, Pakbak | 06000 |
| Paksa, Pakbak | 06000 |
| Phavi, Pakbak | 06000 |
| Phoumouang, Pakbak | 06000 |
| Sa-Orh, Pakbak | 06000 |
| Sapheun, Pakbak | 06000 |
| Thin, Pakbak | 06000 |
| Viengxay, Pakbak | 06000 |