| Place | Post Code |
|---|---|
| Sainpatti S.P. Singh, Tirhut) | 843109 |
| Salempur Dhab, Tirhut) | 842004 |
| Serukahi, Tirhut) | 843109 |
| Shahbazpur, Tirhut) | 843108 |
| Shahpur, Tirhut) | 843113 |
| Shampur Bhoj, Tirhut) | 843109 |
| Sherpur Urf Mahammadpur Mustak, Tirhut) | 843109 |
| Singar, Tirhut) | 843109 |
| Sirna Urf Bheriahi, Tirhut) | 843109 |
| Sirsia Buzurg, Tirhut) | 843108 |
| Sirsian Buzurg, Tirhut) | 843108 |
| Sonbarsa, Tirhut) | 843128, 843131 |
| Suratpur, Tirhut) | 843109 |
| Tola Chand Pande Urf Bherahi, Tirhut) | 843109 |