| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1451 | Sikarpur | Balia Belon BO | 📍 855113 | Kadwa | Branch Post Office |
| 1452 | Sikat | Sikat BO | 📍 854115 | Barari | Branch Post Office |
| 1453 | Siktia | Siktia BO | 📍 855113 | Azamnagar | Branch Post Office |
| 1454 | Siktiya Tola | Sahja BO | 📍 854107 | Pranpur | Branch Post Office |
| 1455 | Silaur | Gauripur BO | 📍 854116 | Pranpur | Branch Post Office |
| 1456 | Simaria | B.Simaria BO | 📍 854106 | Korha | Branch Post Office |
| 1457 | Simlapara | Madarichak BO | 📍 854113 | Manihari | Branch Post Office |
| 1458 | Singhaul | Siktia BO | 📍 855113 | Azamnagar | Branch Post Office |
| 1459 | Singhgaon | Telta BO | 📍 854317 | Barsoi | Branch Post Office |
| 1460 | Singhia | Chakmaka BO | 📍 854113 | Amdabad | Branch Post Office |
| 1461 | Singhia | Dilli Diwanganj BO | 📍 854117 | Amdabad | Branch Post Office |
| 1462 | Singhia | Shitalpur Onkar BO | 📍 854317 | Barsoi | Branch Post Office |
| 1463 | Singhia | Belbari BO | 📍 855113 | Azamnagar | Branch Post Office |
| 1464 | Singhrol | Nimoul BO | 📍 855113 | Azamnagar | Branch Post Office |
| 1465 | Sirampur | Bighor BO | 📍 854317 | Balrampur | Branch Post Office |
| 1466 | Sirauda | Gauripur BO | 📍 854116 | Pranpur | Branch Post Office |
| 1467 | Sirkol Milik | Dhanetha BO | 📍 854108 | Falka | Branch Post Office |
| 1468 | Sirmatpur | Nimoul BO | 📍 855113 | Azamnagar | Branch Post Office |
| 1469 | Sirnia | Sirnia BO | 📍 854103 | katihar | Branch Post Office |
| 1470 | Sirpatol | B.Balrampur BO | 📍 854317 | Balrampur | Branch Post Office |
| 1471 | Sirsa Medical college | Katihar Bmp Camp SO | 📍 854106 | katihar | Post Office - PO |
| 1472 | Sirsa Recruitment Office | Katihar Bmp Camp SO | 📍 854106 | katihar | Post Office - PO |
| 1473 | Sisabari | Porla BO | 📍 855102 | Azamnagar | Branch Post Office |
| 1474 | Sisia | Jagdishpur BO | 📍 854115 | Barari | Branch Post Office |
| 1475 | Sisia | Jhawa BO | 📍 855113 | Kadwa | Branch Post Office |
| 1476 | Sisia | Nimoul BO | 📍 855113 | Azamnagar | Branch Post Office |
| 1477 | Sisia Sheoparshad | Korha SO | 📍 854108 | Korha | Post Office - PO |
| 1478 | Sitalmani | Sitalmani BO | 📍 855102 | Azamnagar | Branch Post Office |
| 1479 | Sitalpur | Shitalpur Onkar BO | 📍 854317 | Barsoi | Branch Post Office |
| 1480 | Sitalpur | Jhawa BO | 📍 855113 | Kadwa | Branch Post Office |
| 1481 | Sitalpur | Siktia BO | 📍 855113 | Azamnagar | Branch Post Office |
| 1482 | Sitalpur Milik | Shitalpur Onkar BO | 📍 854317 | Barsoi | Branch Post Office |
| 1483 | Sitgaon | Gunjan BO | 📍 854317 | Barsoi | Branch Post Office |
| 1484 | Sohar | Fatehpur BO | 📍 854335 | Balrampur | Branch Post Office |
| 1485 | Sohar Milik | Telta BO | 📍 854317 | Balrampur | Branch Post Office |
| 1486 | Sohasa | Jhawa BO | 📍 855113 | Kadwa | Branch Post Office |
| 1487 | Sohela | Sahja BO | 📍 854107 | Pranpur | Branch Post Office |
| 1488 | Sohtha | Falka BO | 📍 854114 | Falka | Branch Post Office |
| 1489 | Solkandha | Siktia BO | 📍 855113 | Azamnagar | Branch Post Office |
| 1490 | Sonaila | Sonaili SO | 📍 855114 | Pranpur | Post Office - PO |
| 1491 | Sonaili | Sonaili SO | 📍 855114 | Kadwa | Post Office - PO |
| 1492 | Sonapur | Awadpur BO | 📍 855102 | Barsoi | Branch Post Office |
| 1493 | Sonapur | Jhawa BO | 📍 855113 | Kadwa | Branch Post Office |
| 1494 | Sonatola | Awadpur BO | 📍 855102 | Barsoi | Branch Post Office |
| 1495 | Sonbarsa East tola | Madhura BO | 📍 854107 | Pranpur | Branch Post Office |
| 1496 | Sonbarsa West tola | Madhura BO | 📍 854107 | Pranpur | Branch Post Office |
| 1497 | Sonitola | Telta BO | 📍 854317 | Balrampur | Branch Post Office |
| 1498 | Sora Khana | Sonaili SO | 📍 855114 | Korha | Post Office - PO |
| 1499 | Sorakhar | Sankola BO | 📍 855102 | Barsoi | Branch Post Office |
| 1500 | Sosnabharjana | Madarichak BO | 📍 854113 | Manihari | Branch Post Office |