| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1401 | Kishunwari | Ansar BO | 📍 841203 | Siswan | Branch Post Office |
| 1402 | Kismat Barwa | Asaon SO | 📍 841287 | Andar | Post Office - PO |
| 1403 | Kodai | Champ BO | 📍 841241 | Hussainganj | Branch Post Office |
| 1404 | koeri Tola | Bharuli BO | 📍 841245 | Ziradei | Branch Post Office |
| 1405 | Kohrauta | Laheji BO | 📍 841233 | Hasanpura | Branch Post Office |
| 1406 | Koierigawan | Koerigawan BO | 📍 841232 | Barharia | Branch Post Office |
| 1407 | Koiri Tola | Barhria SO | 📍 841232 | Barharia | Post Office - PO |
| 1408 | Koiri Tola Chaukihasan | Chaukihasan BO | 📍 841506 | Barharia | Branch Post Office |
| 1409 | Koirigawa | Paterhi SO | 📍 841242 | Maharajganj | Post Office - PO |
| 1410 | Kokil Hata | Goreakothi SO | 📍 841434 | Goriakothi | Post Office - PO |
| 1411 | Kolhua | Kolhua BO | 📍 841233 | Siswan | Branch Post Office |
| 1412 | Kolhuwa Dargah | Anugrhnagar BO | 📍 841239 | Mairwa | Branch Post Office |
| 1413 | Konhara Dhari Nizamat Diara | Raghunathpur SO Siwan | 📍 841504 | Raghunathpur | Post Office - PO |
| 1414 | Konhradhari Nizamat | Raghunathpur SO Siwan | 📍 841504 | Raghunathpur | Post Office - PO |
| 1415 | Konrar | Basantpur SO Siwan | 📍 841406 | Bhagwanpur Hat | Post Office - PO |
| 1416 | Korakhap | Pachrukhi SO | 📍 841241 | Pachrukhi | Post Office - PO |
| 1417 | Korar | Habibnagar BO | 📍 841226 | Pachrukhi | Branch Post Office |
| 1418 | Korar | Bagaura SO | 📍 841404 | Daraundha | Post Office - PO |
| 1419 | Korar | Dabchhu BO | 📍 841420 | Lakri Nabiganj | Branch Post Office |
| 1420 | Korara tola | Bishunpura Bazar BO | 📍 841239 | Mairwa | Branch Post Office |
| 1421 | Korari Kalan | Daronda SO | 📍 841233 | Daraundha | Post Office - PO |
| 1422 | Korari Khurd | Daronda SO | 📍 841233 | Daraundha | Post Office - PO |
| 1423 | korarimathia | Daronda SO | 📍 841233 | Daraundha | Post Office - PO |
| 1424 | Korigawan | Choiapali BO | 📍 841242 | Bhagwanpur Hat | Branch Post Office |
| 1425 | Koror | Bagaura SO | 📍 841404 | Hasanpura | Post Office - PO |
| 1426 | Kothuasaranpur | Kothua Sarangpur BO | 📍 841238 | Daraundha | Branch Post Office |
| 1427 | Kuahi | Tethli BO | 📍 841232 | Barharia | Post Office - PO |
| 1428 | Kuberwa | Pachlakhi BO | 📍 841436 | Siwan | Branch Post Office |
| 1429 | Kukumpur | Basantpur SO Siwan | 📍 841406 | Basantpur | Post Office - PO |
| 1430 | Kuldipa | Bilaspur BO | 📍 841239 | Mairwa | Branch Post Office |
| 1431 | Kum Kum Pur | Kauria BO | 📍 841406 | Bhagwanpur Hat | Branch Post Office |
| 1432 | Kumhati | Kumhti BO | 📍 841235 | Darauli | Branch Post Office |
| 1433 | Kumhti | Kumhti BO | 📍 841235 | Darauli | Branch Post Office |
| 1434 | Kunresar | Belauri BO | 📍 841239 | Guthani | Branch Post Office |
| 1435 | Kuraishi Tola Chaukihasan | Chaukihasan BO | 📍 841506 | Barharia | Branch Post Office |
| 1436 | kuriapur | Barhria SO | 📍 841232 | Barharia | Post Office - PO |
| 1437 | Kurmauli | Belauri BO | 📍 841239 | Guthani | Branch Post Office |
| 1438 | Kurmauta | Nautan BO | 📍 841243 | Nautan | Branch Post Office |
| 1439 | Kurmha | Talli BO | 📍 841239 | Guthani | Branch Post Office |
| 1440 | Kurmi tola | Balhu BO | 📍 841234 | Darauli | Branch Post Office |
| 1441 | Kurmi Tola Tarwara | Tarwara SO | 📍 841506 | Pachrukhi | Post Office - PO |
| 1442 | Kurwa | Barhria SO | 📍 841232 | Barharia | Post Office - PO |
| 1443 | Kurwa | Tethli BO | 📍 841232 | Barharia | Post Office - PO |
| 1444 | Kusahra | Nand Pur Amwari BO | 📍 841231 | Raghunathpur | Branch Post Office |
| 1445 | Kushahara | Nand Pur Amwari BO | 📍 841231 | Raghunathpur | Branch Post Office |
| 1446 | Kutub Chapra | Bakerganj SO | 📍 841286 | Hasanpura | Post Office - PO |
| 1447 | Kutub Chhapra | Rachhopali BO | 📍 841427 | Barharia | Branch Post Office |
| 1448 | Kuwahin | Koerigawan BO | 📍 841232 | Barharia | Branch Post Office |
| 1449 | L Nabiganj | Marachhi BO | 📍 841434 | Goriakothi | Branch Post Office |
| 1450 | Labhri | Lebhri BO | 📍 841239 | Mairwa | Branch Post Office |