| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Senuaria, Tirhut) | 845305 |
| Postal/ZIP Codes in Sidhpur, Tirhut) | 845305 |
| Postal/ZIP Codes in Sihorwa, Tirhut) | 845305 |
| Postal/ZIP Codes in Sihpur, Tirhut) | 845305 |
| Postal/ZIP Codes in Sirampur, Tirhut) | 845305 |
| Postal/ZIP Codes in Sirisiya Nizamat, Tirhut) | 845301, 845305 |
| Postal/ZIP Codes in Sirsia Birit, Tirhut) | 845301, 845305 |
| Postal/ZIP Codes in Siswa, Tirhut) | 845301, 845305 |
| Postal/ZIP Codes in Siswaniyan, Tirhut) | 845301 |
| Postal/ZIP Codes in Sitalpur, Tirhut) | 845305 |
| Postal/ZIP Codes in Srirampur, Tirhut) | 845305 |