| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1351 | Sahit | Vidhyapati Nagar SO | 📍 848503 | Vidyapati Nagar | Post Office - PO |
| 1352 | Sahru | Dharia BO | 📍 847304 | Shivaji Nagar | Branch Post Office |
| 1353 | Sahuri | Saidpur BO | 📍 848125 | Kalyanpur | Branch Post Office |
| 1354 | Saidpur | Saidpur BO | 📍 848125 | Kalyanpur | Branch Post Office |
| 1355 | Saidpur | Lagunia BO | 📍 848504 | Patori | Branch Post Office |
| 1356 | Saidpur Urf Purkhotimpur | Indrawara BO | 📍 848505 | Morwa | Branch Post Office |
| 1357 | Saidpur Zahid | Bhagwanpur Desua BO | 📍 848134 | Ujiarpur | Branch Post Office |
| 1358 | Sajanpur | Muktapur BO | 📍 848102 | Warisnagar | Branch Post Office |
| 1359 | Sakh Mohan | Sakhmohan BO | 📍 848211 | Bibhutpur | Branch Post Office |
| 1360 | Sakhwa | Sakhwa BO | 📍 848207 | Bithan | Branch Post Office |
| 1361 | Salaha | Kalaunjar BO | 📍 848125 | Kalyanpur | Branch Post Office |
| 1362 | Salaha | Sohma BO | 📍 848207 | Bithan | Branch Post Office |
| 1363 | Salaha Chandan | Sohma BO | 📍 848207 | Bithan | Branch Post Office |
| 1364 | Salaimpur | Bajitpur Meari BO | 📍 848114 | Sarairanjan | Branch Post Office |
| 1365 | Salempatti | Rebra BO | 📍 848117 | Khanpur | Branch Post Office |
| 1366 | Salempatti | Sripur Gahar BO | 📍 848117 | Khanpur | Branch Post Office |
| 1367 | Salempur | Kasba Tajpur BO | 📍 848130 | Tajpur | Branch Post Office |
| 1368 | Salempur Dasraha | Karpoorigram BO | 📍 848129 | Samastipur | Branch Post Office |
| 1369 | Salempur Dasraha | Shambhupatti SO | 📍 848129 | Samastipur | Post Office - PO |
| 1370 | Salepur | Bishanpur Keothar BO | 📍 848206 | Singhia | Branch Post Office |
| 1371 | Salepur | Singhia SO | 📍 848209 | Singhia | Post Office - PO |
| 1372 | Salha Buzurg | Salha Buzurg BO | 📍 848207 | Bithan | Branch Post Office |
| 1373 | Salkhani | Singhia Ghat SO | 📍 848236 | Bibhutpur | Post Office - PO |
| 1374 | Samarhati | Biraul SO | 📍 847203 | Shivaji Nagar | Post Office - PO |
| 1375 | Samartha | Samartha BO | 📍 848160 | Bibhutpur | Branch Post Office |
| 1376 | Samastipur | Samastipur Bazar SO | 📍 848101 | Samastipur | Post Office - PO |
| 1377 | Samastipur | Samastipur HO | 📍 848101 | Samastipur | Head Post Office - H |
| 1378 | Sambhupatti | Shambhupatti SO | 📍 848129 | Samastipur | Post Office - PO |
| 1379 | Sangrampur | Bikrampur Bandey BO | 📍 848129 | Samastipur | Branch Post Office |
| 1380 | Sangrampur | Gorgama BO | 📍 848504 | Patori | Branch Post Office |
| 1381 | Sanhakka | Wari BO | 📍 848209 | Singhia | Branch Post Office |
| 1382 | Sankarpur | Sakarpura BO | 📍 848205 | Hasanpur | Branch Post Office |
| 1383 | Sapahua Basauli | Bihrha SO | 📍 848216 | Rosera | Post Office - PO |
| 1384 | Sapri | Sakarpura BO | 📍 848205 | Hasanpur | Branch Post Office |
| 1385 | Sarae Ranjan | Sarairanjan SO | 📍 848127 | Sarairanjan | Post Office - PO |
| 1386 | Sarairanjan | Sarairanjan SO | 📍 848127 | Sarairanjan | Post Office - PO |
| 1387 | Saraiya | Kalyanpur SO Samastipur | 📍 848160 | Bibhutpur | Post Office - PO |
| 1388 | Sarangpur | Sarangpur BO | 📍 848505 | Morwa | Branch Post Office |
| 1389 | Sarari | Madhopur BO | 📍 848506 | Mohanpur | Branch Post Office |
| 1390 | Sarda Nagar | Rosera SO | 📍 848210 | Rosera | Post Office - PO |
| 1391 | Sardarganj | Chaknawada BO | 📍 848114 | Dalsinghsarai | Branch Post Office |
| 1392 | Sardimal | Kalaunjar BO | 📍 848125 | Kalyanpur | Branch Post Office |
| 1393 | Sarhad Bhairo | Mahmmadipur BO | 📍 848502 | Mohiuddinagar | Branch Post Office |
| 1394 | Sarhad Madho | Chaksaho BO | 📍 848504 | Patori | Branch Post Office |
| 1395 | Sari | Sari BO | 📍 848101 | Warisnagar | Branch Post Office |
| 1396 | Sari BO | Sari BO | 📍 848104 | Samastipur | Branch Post Office |
| 1397 | Sari Tole Barhkurwa | Bauharwa BO | 📍 847423 | Kalyanpur | Branch Post Office |
| 1398 | Sari Tole Malipur | Sari BO | 📍 848101 | Warisnagar | Branch Post Office |
| 1399 | Sari Tole Sanichara Asthan | Sari BO | 📍 848101 | Warisnagar | Branch Post Office |
| 1400 | Sarmastpur | Simri BO | 📍 848503 | Vidyapati Nagar | Branch Post Office |