| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 651 | Khangah | Barabad BO | 📍 813211 | Shambhuganj | Branch Post Office |
| 652 | Khanjarpur | Bhadoria BO | 📍 813105 | Amarpur | Branch Post Office |
| 653 | Kharahara | Karaharia BO | 📍 813201 | Barahat | Branch Post Office |
| 654 | Kharauni | Gorgama BO | 📍 813104 | Bausi | Branch Post Office |
| 655 | Kharauni | Jagdishpur SO Bhagalpur | 📍 813105 | Rajaun | Post Office - PO |
| 656 | Kharauwa | Rata BO | 📍 813207 | Phulidumar | Branch Post Office |
| 657 | Khardauri | Katoria SO | 📍 813106 | Amarpur | Post Office - PO |
| 658 | Kharihara | Chakrani BO | 📍 853203 | Barahat | Branch Post Office |
| 659 | Kharundha | Mathura Sahibganj BO | 📍 813202 | Belhar | Branch Post Office |
| 660 | Kharwa | Kajhia BO | 📍 813103 | Barahat | Branch Post Office |
| 661 | Kharwa | Rajoun SO | 📍 813107 | Rajaun | Post Office - PO |
| 662 | Khas Bagha | Shambhuganj SO | 📍 813211 | Shambhuganj | Post Office - PO |
| 663 | Khawaspur | Domohan BO | 📍 813102 | Banka | Head Post Office - H |
| 664 | Khemi Chak | Bishambharchak BO | 📍 813101 | Amarpur | Branch Post Office |
| 665 | Khiri | Barahat SO | 📍 813103 | Barahat | Post Office - PO |
| 666 | Khiri | Rajoun SO | 📍 813107 | Rajaun | Post Office - PO |
| 667 | Khirjan | Jagdishpur SO Bhagalpur | 📍 813105 | Rajaun | Post Office - PO |
| 668 | Khorimon | Phaga BO | 📍 813104 | Bausi | Branch Post Office |
| 669 | Khudbari | Domohan BO | 📍 813102 | Banka | Head Post Office - H |
| 670 | Khushalpur | Rupsa BO | 📍 813105 | Rajaun | Branch Post Office |
| 671 | Khutahri | Rauja BO | 📍 813207 | Belhar | Branch Post Office |
| 672 | Khutwa | Malbathan BO | 📍 813102 | Katoria | Head Post Office - H |
| 673 | Kifaetpur | Rajoun SO | 📍 813107 | Rajaun | Post Office - PO |
| 674 | Kinuar | Kenduar BO | 📍 813101 | Phulidumar | Branch Post Office |
| 675 | Kiranpur | Pararia BO | 📍 813211 | Shambhuganj | Branch Post Office |
| 676 | Kishuni Chak | Maikaita BO | 📍 813105 | Dhuraiya | Branch Post Office |
| 677 | Kishunpur | Rajoun SO | 📍 813107 | Rajaun | Post Office - PO |
| 678 | Kitadesri | Golhatti BO | 📍 813104 | Bausi | Branch Post Office |
| 679 | Koindha | Salempur BO | 📍 813101 | Amarpur | Branch Post Office |
| 680 | Kol Buzurg | Kolbuzurg BO | 📍 813101 | Amarpur | Branch Post Office |
| 681 | Kol Khurd | Kolbuzurg BO | 📍 813101 | Amarpur | Branch Post Office |
| 682 | Kolhara | Rajoun SO | 📍 813107 | Rajaun | Post Office - PO |
| 683 | Kolhatha | Kolhatha BO | 📍 813109 | Barahat | Branch Post Office |
| 684 | Kolhua | Inarabaran BO | 📍 814131 | Katoria | Branch Post Office |
| 685 | Korara | Maheshadih BO | 📍 813102 | Banka | Head Post Office - H |
| 686 | Korharia Arazi | Karanjha BO | 📍 813207 | Shambhuganj | Branch Post Office |
| 687 | Korhatikar | Bhurna BO | 📍 813104 | Bausi | Branch Post Office |
| 688 | Korhatikar | Kasba BO | 📍 813211 | Bausi | Branch Post Office |
| 689 | Korhia | Lohari BO | 📍 814131 | Chanan | Branch Post Office |
| 690 | Kotra | Hasai BO | 📍 813205 | Dhuraiya | Branch Post Office |
| 691 | Kotwali | Patsorikhaira BO | 📍 813107 | Rajaun | Branch Post Office |
| 692 | Kuarmahas | Rahmandih BO | 📍 813205 | Dhuraiya | Branch Post Office |
| 693 | Kumardih | Chalna BO | 📍 813110 | Dhuraiya | Branch Post Office |
| 694 | Kumarpur | Kumarpur BO | 📍 813211 | Phulidumar | Branch Post Office |
| 695 | Kumrel | Darha BO | 📍 813212 | Belhar | Branch Post Office |
| 696 | Kunath | Pararia Chakadih BO | 📍 813102 | Shambhuganj | Head Post Office - H |
| 697 | Kunauni | Maheshadih BO | 📍 813102 | Banka | Head Post Office - H |
| 698 | Kunauni | Kunouni BO | 📍 813102 | Banka | Head Post Office - H |
| 699 | Kunauni | Kunonira BO | 📍 813102 | Banka | Head Post Office - H |
| 700 | Kuntha | Mahisota BO | 📍 813211 | Shambhuganj | Branch Post Office |