| Place | Postal Code |
|---|---|
| Boung, Kokmak | 13000 |
| Dindeng, Kokmak | 13000 |
| Houaydang, Kokmak | 13000 |
| Houayhong, Kokmak | 13000 |
| Houaysuane, Kokmak | 13000 |
| Kokmak, Kokmak | 13000 |
| Latdeng Gnai, Kokmak | 13000 |
| Latdong Noy, Kokmak | 13000 |
| Mai, Kokmak | 13000 |
| Na Cha Ling, Kokmak | 13000 |
| Nampakhene, Kokmak | 13000 |
| Noy, Kokmak | 13000 |
| Samnakmouang, Kokmak | 13000 |
| Thonglouang, Kokmak | 13000 |
| Torheua, Kokmak | 13000 |