| Place | Post Code |
|---|---|
| Parsa Madho, Kosi) | 852138 |
| Phulwaria, Kosi) | 852105 |
| Rajpur, Kosi) | 852138 |
| Shivpuri, Kosi) | 852138 |
| Singiawan, Kosi) | 852138 |
| Sisauni, Kosi) | 852138 |
| Siswa, Kosi) | 852131 |
| Sohagpur, Kosi) | 852138 |
| Sujanpur, Kosi) | 852138 |
| Sukhasan, Kosi) | 852105 |
| Sukmarpur, Kosi) | 852138 |
| Tharbitta, Kosi) | 852138 |
| Tulapatti, Kosi) | 852138 |
| Postal Codes in Supaul | |
|---|---|
| Basantpur | |
| Chhatapur | |
| Kishanpur | |
| Marauna | |
| Nirmali | |
| Pipra | |
| Pratapganj | |
| Raghopur | |
| Saraigarh Bhaptiyahi | |
| Supaul | |
| Tribeniganj | |