| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 401 | Risdih | Markama BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 402 | Sabal Bigha | Sawal Bigha BO | 📍 811315 | Sikandra | Branch Post Office |
| 403 | Sabalpur | Kala BO | 📍 811312 | Lakshmipur | Branch Post Office |
| 404 | Sagawan | Dhanama BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 405 | Sagdaha | Nariyana BO | 📍 811317 | Khaira | Branch Post Office |
| 406 | Sahasram | Pirhinda BO | 📍 811315 | Sikandra | Branch Post Office |
| 407 | Sahora | Sahora BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 408 | Sahur | Amrath BO | 📍 811313 | Jamui | Branch Post Office |
| 409 | Sakal | Laxmipur Jamui SO | 📍 811312 | Lakshmipur | Post Office - PO |
| 410 | Sakdari | Khelari BO | 📍 811317 | Khaira | Branch Post Office |
| 411 | Sakinchapri | Aghara So BO | 📍 811314 | Sono | Branch Post Office |
| 412 | Salaiya Kasoia | Nimnawada BO | 📍 811317 | Khaira | Branch Post Office |
| 413 | Sangthu | Amrath BO | 📍 811313 | Jamui | Branch Post Office |
| 414 | Sanpo | Abgil Chaurama BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 415 | Sansarpur | Keshopur BO | 📍 811305 | Gidhaur | Branch Post Office |
| 416 | Sardawad | Sijhauri BO | 📍 811315 | Sikandra | Branch Post Office |
| 417 | Sarsa | Sarsa Bichwe BO | 📍 811315 | Sikandra | Branch Post Office |
| 418 | Semaria Bikrampur | Maniyadda BO | 📍 811313 | Jamui | Branch Post Office |
| 419 | Sewa | Sevai BO | 📍 811305 | Gidhaur | Branch Post Office |
| 420 | Seway | Aliganj SO Jamui | 📍 811301 | Islamnagar Aliganj | Post Office - PO |
| 421 | Seway | Seway BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 422 | Sewe | Seway BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 423 | Shaharpharka | Sono SO | 📍 811314 | Sono | Post Office - PO |
| 424 | Shiudih | Khaira BO | 📍 811213 | Sikandra | Branch Post Office |
| 425 | Sidhesri | Sono SO | 📍 811314 | Jhajha | Post Office - PO |
| 426 | Siho Chak | Amrath BO | 📍 811313 | Jamui | Branch Post Office |
| 427 | Sijori | Sijhauri BO | 📍 811315 | Sikandra | Branch Post Office |
| 428 | Sikandra | Sikandra SO Jamui | 📍 811315 | Sikandra | Post Office - PO |
| 429 | Silauri | Tarhari BO | 📍 811315 | Sikandra | Branch Post Office |
| 430 | Simaria | Gidhaur SO | 📍 811305 | Gidhaur | Post Office - PO |
| 431 | Singarpur | Khaira SO Jamui | 📍 811317 | Khaira | Post Office - PO |
| 432 | Sira Nawada | Amrath BO | 📍 811313 | Jamui | Branch Post Office |
| 433 | Sitla Chak | Amrath BO | 📍 811313 | Jamui | Branch Post Office |
| 434 | Sohjana | Sohjana BO | 📍 811305 | Gidhaur | Branch Post Office |
| 435 | Sokho | Garhi BO | 📍 811317 | Khaira | Branch Post Office |
| 436 | Solahpur | Islamnagar BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 437 | Sonai | Amrath BO | 📍 811313 | Jamui | Branch Post Office |
| 438 | Sondipi | Dighi BO | 📍 811312 | Lakshmipur | Branch Post Office |
| 439 | Sono | Sono SO | 📍 811314 | Sono | Post Office - PO |
| 440 | Sonpai | Sonpai BO | 📍 811305 | Jamui | Branch Post Office |
| 441 | Sugi | Suggi BO | 📍 811305 | Jamui | Branch Post Office |
| 442 | Suhia | Gaura BO | 📍 811312 | Lakshmipur | Branch Post Office |
| 443 | Sukhlewa | Darha BO | 📍 811313 | Barhat | Branch Post Office |
| 444 | Sultanpur | T. Barajor BO | 📍 811308 | Jhajha | Branch Post Office |
| 445 | Sultanpur | Lohra BO | 📍 811313 | Jamui | Branch Post Office |
| 446 | Sundar Badh | Pursanda BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 447 | Suraundha | Khaira SO Jamui | 📍 811317 | Khaira | Post Office - PO |
| 448 | Tabbala | Aghara So BO | 📍 811314 | Sono | Branch Post Office |
| 449 | Tajpur | Islamnagar BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 450 | Tal Saharsa | Tal Saharsa BO | 📍 811315 | Sikandra | Branch Post Office |