| Place | Post Code |
|---|---|
| Khoju Chak, Kosi) | 852127 |
| Kusmi, Kosi) | 852127 |
| Lagma, Kosi) | 852127 |
| Madanpur, Kosi) | 852106 |
| Madhuban, Kosi) | 852127 |
| Mahammad Pur, Kosi) | 852106 |
| Mahkhar, Kosi) | 852127 |
| Manjhwa, Kosi) | 852106 |
| Mohanpur, Kosi) | 852106 |
| Motihani, Kosi) | 852106 |
| Nainpur, Kosi) | 852127 |
| Naltigarh, Kosi) | 852127 |
| Paharpur, Kosi) | 852127, 852106 |
| Raipura, Kosi) | 852127 |
| Rampur, Kosi) | 852127 |
| Saraunja Thana Sitanabad, Kosi) | 852106 |
| Sardiha, Kosi) | 852127 |
| Saronja, Kosi) | 852106 |
| Shankarpur, Kosi) | 852106 |
| Simri, Kosi) | 852127 |
| Simri Bakhtiarpur, Kosi) | 852127 |
| Sisauni, Kosi) | 852106 |
| Sonpura, Kosi) | 852127 |
| Sukhasan, Kosi) | 852106 |
| Tariama, Kosi) | 852127 |
| Teghra, Kosi) | 852106 |
| Tilanthi, Kosi) | 852106 |
| Turki, Kosi) | 852127 |
| Postal Codes in Saharsa | |
|---|---|
| Banma Itahri | |
| Kahara | |
| Mahishi | |
| Nauhatta | |
| Patarghat | |
| Salkhua | |
| Satar Kataiya | |
| Saur Bazar | |
| Simri Bakhtiarpur | |
| Sonbarsa | |