| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 751 | Kaulachi | Anjua BO | 📍 845455 | Narkatiaganj | Branch Post Office |
| 752 | Kaulapur | Behra BO | 📍 845307 | Mainatanr | Branch Post Office |
| 753 | Kaulapur | Dudhiawa BO | 📍 845452 | Jogapatti | Branch Post Office |
| 754 | Kaulapur Kaulanchi | Harpur BO | 📍 845101 | Bagaha | Branch Post Office |
| 755 | Kehunia | Kehunia BO | 📍 845453 | Narkatiaganj | Branch Post Office |
| 756 | Kehunia Dih | Jamunia BO | 📍 845455 | Gaunaha | Branch Post Office |
| 757 | Kehuniya | Gudgudi BO | 📍 845106 | Ramnagar | Branch Post Office |
| 758 | Kerai | Semra Medraul BO | 📍 845105 | Sidhaw | Branch Post Office |
| 759 | Kerai Berai | Naurangia BO | 📍 845105 | Sidhaw | Branch Post Office |
| 760 | Kewlapur | Damrapur BO | 📍 845451 | Mainatanr | Branch Post Office |
| 761 | Khaira Tola | Khaira Tola BO | 📍 845104 | Bhitaha | Branch Post Office |
| 762 | Khaira Tola | Madhubani SO | 📍 845104 | Thakrahan | Post Office - PO |
| 763 | Khairatia | Shiorajpur BO | 📍 845452 | Jogapatti | Branch Post Office |
| 764 | Khairatia | Jamunia BO | 📍 845455 | Gaunaha | Branch Post Office |
| 765 | Khairatwa | Parsa BO | 📍 845101 | Bagaha | Branch Post Office |
| 766 | Khairia | Nauragia Done BO | 📍 845106 | Ramnagar | Branch Post Office |
| 767 | Khairpokhara | Naraipur SO | 📍 845105 | Bagaha | Post Office - PO |
| 768 | Khairwa | Gokhula BO | 📍 845451 | Narkatiaganj | Branch Post Office |
| 769 | Khajoria | Harnatar BO | 📍 845105 | Sidhaw | Branch Post Office |
| 770 | Khajuria | Majharia BO | 📍 845106 | Ramnagar | Branch Post Office |
| 771 | Khajuria | Ramparsauna BO | 📍 845453 | Lauriya | Branch Post Office |
| 772 | Khamaura | Bakuli BO | 📍 845105 | Sidhaw | Branch Post Office |
| 773 | Khamhia | Inarwa Bazar BO | 📍 845306 | Mainatanr | Branch Post Office |
| 774 | Khap Katahri | Musharwa BO | 📍 845455 | Narkatiaganj | Branch Post Office |
| 775 | Khapparsa | Bhawara BO | 📍 845307 | Sikta | Branch Post Office |
| 776 | Kharhat | Chandarpur Bakawa BO | 📍 845101 | Sidhaw | Post Office - PO |
| 777 | Kharkatwa | Padraun BO | 📍 845451 | Narkatiaganj | Branch Post Office |
| 778 | Kharkhuta | Bhuidharwa BO | 📍 845104 | Thakrahan | Branch Post Office |
| 779 | Kharmaini | Sheorajpur BO | 📍 845438 | Nautan | Branch Post Office |
| 780 | Khasuar | Lalgarh BO | 📍 845438 | Chanpatia | Branch Post Office |
| 781 | Khataura | Gudgudi BO | 📍 845106 | Ramnagar | Branch Post Office |
| 782 | Khatauri | Gudgudi BO | 📍 845106 | Ramnagar | Branch Post Office |
| 783 | Khirsar | Gobarahia Done BO | 📍 845106 | Ramnagar | Branch Post Office |
| 784 | Khora Parsa | Parsa BO | 📍 845101 | Bagaha | Branch Post Office |
| 785 | Khurharia | Tarwalia BO | 📍 845105 | Sidhaw | Branch Post Office |
| 786 | Khurhuria | Semra Medraul BO | 📍 845105 | Bagaha | Branch Post Office |
| 787 | Khurhuria | Goithahi BO | 📍 845455 | Gaunaha | Branch Post Office |
| 788 | Khusi Tola | Refujee Camp BO | 📍 845438 | Bairia | Branch Post Office |
| 789 | Khusihal Patti | Parsauni Farm BO | 📍 845453 | Jogapatti | Branch Post Office |
| 790 | Khutia Indu | Chanayan Bandh BO | 📍 845454 | Majhaulia | Branch Post Office |
| 791 | Khutia Indu | Bishabhar Pur BO | 📍 845459 | Majhaulia | Branch Post Office |
| 792 | Khutwania | Jaralpur Dih BO | 📍 845452 | Jogapatti | Branch Post Office |
| 793 | Kohargadi | Rajwatia BO | 📍 845101 | Bagaha | Branch Post Office |
| 794 | Kohargari | Bhitiharwa Ashram BO | 📍 845455 | Gaunaha | Branch Post Office |
| 795 | Koirganwan | Jogapatti SO | 📍 845452 | Jogapatti | Post Office - PO |
| 796 | Koirganwan | Narkaiaganj SO | 📍 845455 | Narkatiaganj | Post Office - PO |
| 797 | Kokila Dih | Lauriya SO | 📍 845453 | Chanpatia | Post Office - PO |
| 798 | Kolhua | Kolhua BO | 📍 845106 | Bagaha | Branch Post Office |
| 799 | Kolhua | Ramnagar SO West Champaran | 📍 845106 | Ramnagar | Post Office - PO |
| 800 | Kolua | Mura Dih BO | 📍 845104 | Madhubani | Branch Post Office |