| Place | Post Code |
|---|---|
| Rajnigot Milik, Kosi) | 852101 |
| Ranipatti, Kosi) | 852112 |
| Sahebganj Itahari, Kosi) | 852122 |
| Sakhua, Kosi) | 852114 |
| Singhian, Kosi) | 852128 |
| Tamautparsa, Kosi) | 852122 |
| Tirkona, Kosi) | 852122 |
| Postal Codes in Madhepura | |
|---|---|
| Alamnagar | |
| Bihariganj | |
| Chausa | |
| Gamharia | |
| Ghailarh | |
| Gwalpara | |
| Kishanganj | |
| Kumarkhand | |
| Madhepura | |
| Murliganj | |
| Puraini | |
| Shankarpur | |
| Singheshwar | |