| Place | Post Code |
|---|---|
| Koriapatti, Kosi) | 852111 |
| Laukaha, Kosi) | 852111 |
| Mahadeo Asthan, Kosi) | 852109 |
| Manik Chand Chakla, Kosi) | 852111 |
| Mansapur, Kosi) | 852215 |
| Motipur, Kosi) | 852215 |
| Norha, Kosi) | 852111 |
| Padum Nagar, Kosi) | 852215 |
| Parmanandpur, Kosi) | 852215 |
| Parsarman, Kosi) | 852111 |
| Phenglas, Kosi) | 852111 |
| Phulkahi, Kosi) | 852111 |
| Piprahi, Kosi) | 852111 |
| Radha Nagar, Kosi) | 852111 |
| Rajpur, Kosi) | 852109 |
| Rajpur Arazi, Kosi) | 852111 |
| Ram Bishanpur, Kosi) | 852111 |
| Rampur, Kosi) | 852111 |
| Sait, Kosi) | 852111 |
| Sarhochia, Kosi) | 852109 |
| Satanpatti, Kosi) | 852111 |
| Satkodaria, Kosi) | 852109 |
| Shankarpur Doulat, Kosi) | 852215 |
| Simrahi Bazar, Kosi) | 852111 |
| Sitaram Chakla, Kosi) | 852111 |
| Sitarampur, Kosi) | 852111 |
| Undraha, Kosi) | 852215 |
| Postal Codes in Supaul | |
|---|---|
| Basantpur | |
| Chhatapur | |
| Kishanpur | |
| Marauna | |
| Nirmali | |
| Pipra | |
| Pratapganj | |
| Raghopur | |
| Saraigarh Bhaptiyahi | |
| Supaul | |
| Tribeniganj | |