| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1451 | Siswa | Sugauli BO | 📍 845455 | Narkatiaganj | Branch Post Office |
| 1452 | Siswa Bairagi | Nawalpur BO | 📍 845452 | Jogapatti | Branch Post Office |
| 1453 | Siswa Bhangaha | Mainatand SO | 📍 845306 | Mainatanr | Post Office - PO |
| 1454 | Siswa Bhuinhar | Shiorajpur BO | 📍 845452 | Jogapatti | Branch Post Office |
| 1455 | Siswa Sarea | Sareya Ojhwalia BO | 📍 845438 | Bairia | Branch Post Office |
| 1456 | Siswania | Jagarnathpur BO | 📍 845307 | Sikta | Branch Post Office |
| 1457 | Siswania | Bakulahar Math BO | 📍 845449 | Chanpatia | Branch Post Office |
| 1458 | Siswania | Sirnagar BO | 📍 845452 | Jogapatti | Branch Post Office |
| 1459 | Siswania | Siswania BO | 📍 845453 | Lauriya | Branch Post Office |
| 1460 | Sita Pur | Sitapur BO | 📍 845103 | Lauriya | Branch Post Office |
| 1461 | Sitalbari | Serwa Done BO | 📍 845106 | Ramnagar | Branch Post Office |
| 1462 | Sitapur | Harinagar SO | 📍 845103 | Ramnagar | Post Office - PO |
| 1463 | Sitapur | Manwa Parsi BO | 📍 845455 | Narkatiaganj | Branch Post Office |
| 1464 | Sithi | Belsandi BO | 📍 845455 | Gaunaha | Branch Post Office |
| 1465 | Sitlapur | Damrapur BO | 📍 845451 | Mainatanr | Branch Post Office |
| 1466 | Siurajpur | Sheorajpur BO | 📍 845438 | Nautan | Branch Post Office |
| 1467 | Siwrahi | Gudgudi BO | 📍 845106 | Ramnagar | Branch Post Office |
| 1468 | Sofwa | Narkaiaganj SO | 📍 845455 | Narkatiaganj | Post Office - PO |
| 1469 | Sohagi Barwa | Naraipur SO | 📍 845105 | Bagaha | Post Office - PO |
| 1470 | Soharia | Laxmipur Bherihari BO | 📍 845107 | Sidhaw | Branch Post Office |
| 1471 | Sohgi Barwa | Sisai BO | 📍 845104 | Madhubani | Branch Post Office |
| 1472 | Sohsa | Meghwal Mathia BO | 📍 845106 | Ramnagar | Branch Post Office |
| 1473 | Somgarh | Sathi BO | 📍 845449 | Narkatiaganj | Branch Post Office |
| 1474 | Sonasati | Rajpur Madan BO | 📍 845455 | Narkatiaganj | Branch Post Office |
| 1475 | Sonbarsa | Manpur BO | 📍 845101 | Bhitaha | Branch Post Office |
| 1476 | Sonbarsa | Purainia BO | 📍 845307 | Sikta | Branch Post Office |
| 1477 | Sonbarsa | Shiorajpur BO | 📍 845452 | Jogapatti | Branch Post Office |
| 1478 | Sonbarsa | Serwa Masjidwa BO | 📍 845455 | Gaunaha | Branch Post Office |
| 1479 | Songharwa | Champapur Gonauli BO | 📍 845107 | Bagaha | Branch Post Office |
| 1480 | Sonkhar | Bakhari Pachrukhia BO | 📍 845106 | Ramnagar | Branch Post Office |
| 1481 | Sonkhar | Jamunia BO | 📍 845455 | Gaunaha | Branch Post Office |
| 1482 | Srinagar | Sirnagar BO | 📍 845452 | Jogapatti | Branch Post Office |
| 1483 | Ssiswa Tola Jai Ray | Chandraha BO | 📍 845101 | Bagaha | Branch Post Office |
| 1484 | Suarchhap | Danial Parsauna BO | 📍 845449 | Lauriya | Branch Post Office |
| 1485 | Subi Bakwa | Bakuli BO | 📍 845105 | Bagaha | Branch Post Office |
| 1486 | Sugaha | Sugaha Bhawanipur BO | 📍 845307 | Sikta | Branch Post Office |
| 1487 | Sugauli | Narkaiaganj SO | 📍 845455 | Narkatiaganj | Post Office - PO |
| 1488 | Sugauli | Sugauli BO | 📍 845455 | Narkatiaganj | Branch Post Office |
| 1489 | Sukhban | Malkauli BO | 📍 845105 | Sidhaw | Branch Post Office |
| 1490 | Sundargawn | Sundar Gaon BO | 📍 845307 | Sikta | Branch Post Office |
| 1491 | Surajpur | Kurshi Barawa BO | 📍 845307 | Sikta | Branch Post Office |
| 1492 | Surajpur | Surajpur BO | 📍 845438 | Bairia | Branch Post Office |
| 1493 | Tadhwa Nandpur | Tadhawa Nandpur BO | 📍 845438 | Bairia | Branch Post Office |
| 1494 | Tahkaul | Belsandi BO | 📍 845455 | Gaunaha | Branch Post Office |
| 1495 | Tama Kuha | Khaira Tola BO | 📍 845104 | Madhubani | Branch Post Office |
| 1496 | Tara | Amolwa BO | 📍 845455 | Gaunaha | Branch Post Office |
| 1497 | Tarharwa | Maldi BO | 📍 845451 | Narkatiaganj | Branch Post Office |
| 1498 | Tariwanwa | Taruanwa BO | 📍 845105 | Sidhaw | Branch Post Office |
| 1499 | Tarkulwa | Taruanwa BO | 📍 845105 | Bagaha | Branch Post Office |
| 1500 | Taruanwa | Naraipur SO | 📍 845105 | Bagaha | Post Office - PO |