| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 551 | Jaitpur | Garha BO | 📍 843320 | Pupri | Branch Post Office |
| 552 | Jalalpur Bangri | B. Dharmapur BO | 📍 843320 | Pupri | Branch Post Office |
| 553 | Jamal Parsa | Barharwa SO Sitamarhi | 📍 843315 | Suppi | Post Office - PO |
| 554 | Jamua | Jamua BO | 📍 843313 | Bairgania | Branch Post Office |
| 555 | Jamua | Barahi BO | 📍 843327 | Sonbarsa | Branch Post Office |
| 556 | Jamunia urf Majurwa | Mayurwa BO | 📍 843330 | Sonbarsa | Branch Post Office |
| 557 | Jamunia urf Majurwa | Sonbersa SO | 📍 843330 | Sonbarsa | Post Office - PO |
| 558 | Janipur | Janipur BO | 📍 843333 | Nanpur | Branch Post Office |
| 559 | Jawahirpur | Radhaur BO | 📍 843331 | Sursand | Branch Post Office |
| 560 | Jawam | K.Siroman BO | 📍 843302 | Dumra | Branch Post Office |
| 561 | Jhaijhat | Bachharpur BO | 📍 843320 | Pupri | Branch Post Office |
| 562 | Jhaijhat | Jhajhihat BO | 📍 843320 | Pupri | Branch Post Office |
| 563 | Jhawa Tola | Belsand SO | 📍 843316 | Belsand | Post Office - PO |
| 564 | Jhawa Tola | Kansar BO | 📍 843316 | Belsand | Branch Post Office |
| 565 | Jhitki | Bokhra BO | 📍 843318 | Bokhara | Branch Post Office |
| 566 | Jhitki | Budhnagra Deorhi SO | 📍 843318 | Bokhara | Post Office - PO |
| 567 | Jhitki | Bhangarah BO | 📍 843318 | Bokhara | Branch Post Office |
| 568 | Jinagar | Bhutahi SO | 📍 843317 | Sonbarsa | Post Office - PO |
| 569 | Jinagar | B. Jay Nagar BO | 📍 843317 | Sonbarsa | Post Office - PO |
| 570 | Jogbana | Jogiwana BO | 📍 843322 | Bathnaha | Branch Post Office |
| 571 | Jogia | Garha BO | 📍 843320 | Pupri | Branch Post Office |
| 572 | Jonka | Bariyarpur BO | 📍 843302 | Bathnaha | Branch Post Office |
| 573 | Joriahi Kothia | Bel BO | 📍 843313 | Bairgania | Branch Post Office |
| 574 | Joriahi Sahapat | Bel BO | 📍 843313 | Bairgania | Branch Post Office |
| 575 | Kabira | H. Dularpur BO | 📍 843331 | Sursand | Branch Post Office |
| 576 | Kachaur | Bhutahi SO | 📍 843317 | Sonbarsa | Post Office - PO |
| 577 | Kachaur | Fulkaha BO | 📍 843317 | Sonbarsa | Post Office - PO |
| 578 | Kachharipur | B. Jay Nagar BO | 📍 843317 | Sonbarsa | Post Office - PO |
| 579 | Kadampur | Bhanaspatti BO | 📍 843328 | Runisaidpur | Branch Post Office |
| 580 | Kalyani | Garha BO | 📍 843320 | Pupri | Branch Post Office |
| 581 | Kalyanpur | Chandwara BO | 📍 843328 | Runisaidpur | Branch Post Office |
| 582 | Kamal Dah | Kamaladah BO | 📍 843323 | Bathnaha | Branch Post Office |
| 583 | Kanhauli | Bhutahi SO | 📍 843317 | Sonbarsa | Post Office - PO |
| 584 | Kanhauli | K. Bhandar BO | 📍 843317 | Sonbarsa | Post Office - PO |
| 585 | Kanhauli Arazi Madhaul | P. Tajpur BO | 📍 843316 | Runisaidpur | Branch Post Office |
| 586 | Kanhauli Gajpati | K.Gajpatti BO | 📍 843325 | Parsauni | Branch Post Office |
| 587 | Kanhwa | Kanhawa BO | 📍 843324 | Parihar | Branch Post Office |
| 588 | Kansar | Belsand SO | 📍 843316 | Belsand | Post Office - PO |
| 589 | Kansar | Kansar BO | 📍 843316 | Belsand | Branch Post Office |
| 590 | Kansara | Bakhari BO | 📍 843331 | Sursand | Branch Post Office |
| 591 | Kapraul Siroman | K.Siroman BO | 📍 843302 | Riga | Branch Post Office |
| 592 | Kara Bhim | Bhulli BO | 📍 843325 | Parsauni | Branch Post Office |
| 593 | Kararbana | Bangaraha BO | 📍 843302 | Sursand | Branch Post Office |
| 594 | Karnahia | Harnahiya BO | 📍 843302 | Dumra | Branch Post Office |
| 595 | Kathor urf Baikunthpur | Kuama BO | 📍 843325 | Parsauni | Branch Post Office |
| 596 | Kauria | Lalpur BO | 📍 843323 | Runisaidpur | Branch Post Office |
| 597 | Kauria | Manikchowk SO | 📍 843323 | Runisaidpur | Post Office - PO |
| 598 | Kauria Raepur | Gaura BO | 📍 843326 | Nanpur | Branch Post Office |
| 599 | Kauria Raepur | Raipur SO Sitamarhi | 📍 843326 | Nanpur | Post Office - PO |
| 600 | Kaurna | Malahi BO | 📍 843331 | Sursand | Branch Post Office |