| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1401 | Sapni | Kalsar BO | 📍 854337 | Hasanganj | Branch Post Office |
| 1402 | Saralia | Salmari SO | 📍 855113 | Kadwa | Post Office - PO |
| 1403 | Saranpur | Dawasai BO | 📍 855105 | Kadwa | Branch Post Office |
| 1404 | Sararia | Salmari SO | 📍 855113 | Kadwa | Post Office - PO |
| 1405 | Sarma Chakla | Khaira BO | 📍 854101 | Sameli | Branch Post Office |
| 1406 | Sarwa Daya Ram | M.T.Devipur BO | 📍 854101 | Barari | Post Office - PO |
| 1407 | Sarwantal Milik | Sameli BO | 📍 854101 | Barari | Branch Post Office |
| 1408 | Satare | Kehunia BO | 📍 854116 | Pranpur | Branch Post Office |
| 1409 | Satarghat | Barsoighat SO | 📍 854317 | Barsoi | Post Office - PO |
| 1410 | Satarpur | Barsoi SO | 📍 855102 | Barsoi | Post Office - PO |
| 1411 | Satbhita | Salmari SO | 📍 855113 | Kadwa | Post Office - PO |
| 1412 | Satuwan | Gaualtoli BO | 📍 855102 | Barsoi | Branch Post Office |
| 1413 | Saula | Awadpur BO | 📍 855102 | Barsoi | Branch Post Office |
| 1414 | Sauria | Sauriya BO | 📍 854107 | Dandkhora | Branch Post Office |
| 1415 | Sealpara | Fatehpur BO | 📍 855101 | Balrampur | Branch Post Office |
| 1416 | Sehra | Salmari SO | 📍 855113 | Kadwa | Post Office - PO |
| 1417 | Semapur Factory | Semapur Factory SO | 📍 854115 | Barari | Post Office - PO |
| 1418 | Semaria | Pothia SO | 📍 854114 | Falka | Post Office - PO |
| 1419 | Semaria Rami | Bhangaha BO | 📍 854114 | Falka | Branch Post Office |
| 1420 | Shah Nagar | Sadapur BO | 📍 855113 | Kadwa | Branch Post Office |
| 1421 | Shahpur | Hemkunj BO | 📍 854113 | Manihari | Branch Post Office |
| 1422 | Shahpur | Gauripur BO | 📍 854116 | Pranpur | Branch Post Office |
| 1423 | Shahpur | Dangal BO | 📍 854317 | Balrampur | Branch Post Office |
| 1424 | Shahpur Dharmi | Ayodhyaganj Bazar SO | 📍 854101 | Kursela | Post Office - PO |
| 1425 | Shahpur Dharmi Milik | Ayodhyaganj Bazar SO | 📍 854101 | Kursela | Post Office - PO |
| 1426 | Shamashpur | Gaualtoli BO | 📍 855102 | Barsoi | Branch Post Office |
| 1427 | Shamsherpur | Porla BO | 📍 855102 | Azamnagar | Branch Post Office |
| 1428 | Shankarpur | Balia Belon BO | 📍 855113 | Kadwa | Branch Post Office |
| 1429 | Shankarpur | Dandkhora BO | 📍 855114 | Dandkhora | Branch Post Office |
| 1430 | Shankarpura | Dandkhora BO | 📍 855114 | Dandkhora | Branch Post Office |
| 1431 | Sharif Nagar | Bighor BO | 📍 854317 | Balrampur | Branch Post Office |
| 1432 | Sharif Nagar Milik | Bighor BO | 📍 854317 | Balrampur | Branch Post Office |
| 1433 | SharifNagar | Gaualtoli BO | 📍 855102 | Barsoi | Branch Post Office |
| 1434 | Shekhpura | Dasgram BO | 📍 855102 | Barsoi | Branch Post Office |
| 1435 | Shekhpura | Balia Belon BO | 📍 855113 | Kadwa | Branch Post Office |
| 1436 | Sheonagar | Azamnagar BO | 📍 855113 | Azamnagar | Branch Post Office |
| 1437 | Shikarpur | Haryabara BO | 📍 854311 | Barsoi | Branch Post Office |
| 1438 | Shikarpur | Kurum BO | 📍 854317 | Kadwa | Branch Post Office |
| 1439 | Shitalmari | Nimoul BO | 📍 855102 | Barsoi | Branch Post Office |
| 1440 | Shivadaspur | Balia Belon BO | 📍 855113 | Kadwa | Branch Post Office |
| 1441 | Shive Puri | Katihar Bmp Camp SO | 📍 854106 | katihar | Post Office - PO |
| 1442 | Shiwanandpur | Shivananpur BO | 📍 855102 | Barsoi | Branch Post Office |
| 1443 | Shiwanpur | Shivananpur BO | 📍 855102 | Barsoi | Branch Post Office |
| 1444 | Sidhua | Mahishal BO | 📍 854317 | Balrampur | Branch Post Office |
| 1445 | Sihagaon | Dangal BO | 📍 854317 | Balrampur | Branch Post Office |
| 1446 | Sihla | Sauriya BO | 📍 854107 | Dandkhora | Branch Post Office |
| 1447 | Sihpur | Balia Belon BO | 📍 855113 | Kadwa | Branch Post Office |
| 1448 | Sihpur | Salmari SO | 📍 855113 | Azamnagar | Post Office - PO |
| 1449 | Sihpur | Shihipur BO | 📍 855113 | Balrampur | Branch Post Office |
| 1450 | Sihrour | Kurum BO | 📍 854317 | Kadwa | Branch Post Office |