| Sub-districts |
| Ziradei, Siwan |
| Siwan, Siwan |
| Siswan, Siwan |
| Raghunathpur, Siwan |
| Pachrukhi, Siwan |
| Nautan, Siwan |
| Mairwa, Siwan |
| Maharajganj, Siwan |
| Lakri Nabiganj, Siwan |
| Hussainganj, Siwan |
| Hasanpura, Siwan |
| Guthani, Siwan |
| Goriakothi, Siwan |
| Daraundha, Siwan |
| Darauli, Siwan |
| Bhagwanpur Hat, Siwan |
| Basantpur, Siwan |
| Barharia, Siwan |
| Andar, Siwan |