| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 401 | Isufa | Sisauni Kothi BO | 📍 851130 | Naokothi | Branch Post Office |
| 402 | Jafarpur | Balahpur BO | 📍 851129 | Matihani | Branch Post Office |
| 403 | Jagan Saidpur | Mirzapur Banduar SO | 📍 851129 | Shamho Akha Kurha | Post Office - PO |
| 404 | Jagarnathpur | Korai BO | 📍 848204 | Garhpura | Branch Post Office |
| 405 | Jagdar | Fazilpur BO | 📍 851127 | Birpur | Branch Post Office |
| 406 | Jagdishpur Narotam | Aijani BO | 📍 848204 | Garhpura | Branch Post Office |
| 407 | Jagdishpur Narotam | Khanjahapur BO | 📍 851132 | Cheria Bariarpur | Branch Post Office |
| 408 | Jahanpur | Bachhawara SO | 📍 851111 | Bachhwara | Post Office - PO |
| 409 | Jailakha Abhiman | Bahadurpur BO | 📍 848203 | Bakhri | Branch Post Office |
| 410 | Jailakhbijai | Bahadurpur BO | 📍 848203 | Bakhri | Branch Post Office |
| 411 | Jaimangal Garh | Manjhaul SO | 📍 851127 | Cheria Bariarpur | Post Office - PO |
| 412 | Jaimangalpur | Mehdasahpur BO | 📍 851132 | Cheria Bariarpur | Branch Post Office |
| 413 | Jairampur | Surajpura BO | 📍 851133 | Bhagwanpur | Branch Post Office |
| 414 | Jalalpur | Balahpur BO | 📍 851129 | Matihani | Branch Post Office |
| 415 | Jamalpur | Baro SO | 📍 851118 | Barauni | Post Office - PO |
| 416 | Jamalpur | Samsa BO | 📍 851128 | Mansurchak | Branch Post Office |
| 417 | Jana | Chhourahi BO | 📍 848202 | Chhorahi | Branch Post Office |
| 418 | Janardanpur | Danauli Phulwaria BO | 📍 851211 | Balia | Branch Post Office |
| 419 | Jankipur | Lakhanpur BO | 📍 851133 | Bhagwanpur | Branch Post Office |
| 420 | jayantigram | Jayintigram BO | 📍 851112 | Begusarai | Branch Post Office |
| 421 | Jhamatia | Bachhawara SO | 📍 851111 | Bachhwara | Post Office - PO |
| 422 | Jhamatia | Barkhunt BO | 📍 851111 | Bachhwara | Branch Post Office |
| 423 | Jharahi | Chhourahi BO | 📍 848202 | Chhorahi | Branch Post Office |
| 424 | Jianandpur | Panchbir BO | 📍 851217 | Sahebpur Kamal | Branch Post Office |
| 425 | Jinedpur | Rajaura SO | 📍 851131 | Begusarai | Post Office - PO |
| 426 | Jit Bazidpur | Kaidrabad BO | 📍 851111 | Bachhwara | Branch Post Office |
| 427 | Jitwarpur | Mirzapur Banduar SO | 📍 851129 | Shamho Akha Kurha | Post Office - PO |
| 428 | Jokia | Jokia BO | 📍 851127 | Bhagwanpur | Branch Post Office |
| 429 | Kabia | Kabia BO | 📍 851133 | Bhagwanpur | Branch Post Office |
| 430 | Kadam Rasul | Lakhminia Bazar BO | 📍 851211 | Balia | Branch Post Office |
| 431 | Kadam Rasul | Panchbir BO | 📍 851217 | Sahebpur Kamal | Branch Post Office |
| 432 | Kadir Chak | Baro SO | 📍 851118 | Teghra | Post Office - PO |
| 433 | Kadrabad | Kaidrabad BO | 📍 851111 | Bachhwara | Branch Post Office |
| 434 | Kagjania | Hariharpur BO | 📍 851133 | Teghra | Branch Post Office |
| 435 | Kaith | Kaith BO | 📍 851131 | Begusarai | Branch Post Office |
| 436 | Kaithwan | Sihma BO | 📍 851129 | Begusarai | Branch Post Office |
| 437 | Kalyanpur | Sahebpur Kamal SO | 📍 851217 | Sahebpur Kamal | Post Office - PO |
| 438 | Kamalpur | Dafarpur BO | 📍 851127 | Naokothi | Branch Post Office |
| 439 | Kamalpur | Parmanandpur BO | 📍 851211 | Balia | Branch Post Office |
| 440 | Kamalpur Darab | Nayanagar BO | 📍 851133 | Teghra | Branch Post Office |
| 441 | kamaruddinpur | Kamruddinpur BO | 📍 851134 | Begusarai | Branch Post Office |
| 442 | Kame Chak | Mahipa Tol BO | 📍 851211 | Dandari | Branch Post Office |
| 443 | Kamtauli | Kushmahaut BO | 📍 851129 | Begusarai | Branch Post Office |
| 444 | Kanausi | Dunhi BO | 📍 848204 | Garhpura | Branch Post Office |
| 445 | Karaitanr | Samsa BO | 📍 848201 | Naokothi | Branch Post Office |
| 446 | Karanpur | B.Bazar SO | 📍 848201 | Bakhri | Branch Post Office |
| 447 | Kari Chak | Babhangama BO | 📍 851131 | Begusarai | Branch Post Office |
| 448 | Kari Chak | Chhapki BO | 📍 851131 | Barauni | Branch Post Office |
| 449 | Karkauli | Ghagrha BO | 📍 848201 | Bakhri | Branch Post Office |
| 450 | Karor | Khanjahapur BO | 📍 851132 | Cheria Bariarpur | Branch Post Office |