| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 751 | Kasht Habar | Kehunia BO | 📍 854116 | Pranpur | Branch Post Office |
| 752 | Kashtakar | Sahja BO | 📍 854107 | Pranpur | Branch Post Office |
| 753 | Kasul | Sudhani RS BO | 📍 854317 | Barsoi | Branch Post Office |
| 754 | Kasundi | Pranpur BO | 📍 854116 | Pranpur | Branch Post Office |
| 755 | Katakus | Kantakosh BO | 📍 854113 | Manihari | Branch Post Office |
| 756 | Katara | Kurum BO | 📍 854317 | Kadwa | Branch Post Office |
| 757 | Katghar Karimullahpur | Pranpur BO | 📍 854116 | Pranpur | Branch Post Office |
| 758 | Katha Chak | Chhohar BO | 📍 854114 | Sameli | Branch Post Office |
| 759 | Katihar | Katihar HO | 📍 854105 | katihar | Head Post Office - H |
| 760 | Katihar | Katihar Bmp Camp SO | 📍 854106 | katihar | Post Office - PO |
| 761 | katihar | Katihar Mill SO | 📍 854107 | katihar | Post Office - PO |
| 762 | katihar | Madhura BO | 📍 854107 | Pranpur | Branch Post Office |
| 763 | Katihar | Kuretha' BO | 📍 854107 | katihar | Branch Post Office |
| 764 | katihar | Madhura BO | 📍 854335 | Pranpur | Branch Post Office |
| 765 | Katihar Court | Katihar Court SO | 📍 854109 | katihar | Post Office - PO |
| 766 | Katihar Mills | Katihar Mill SO | 📍 854107 | katihar | Post Office - PO |
| 767 | Kawa Mari | Rosna SO | 📍 854117 | Amdabad | Post Office - PO |
| 768 | Kawaiya | Kalsar BO | 📍 854337 | Hasanganj | Branch Post Office |
| 769 | Kazipura | Azamnagar BO | 📍 855113 | Azamnagar | Branch Post Office |
| 770 | Kebala | Manihari SO | 📍 854113 | Manihari | Post Office - PO |
| 771 | Kebala | Bairia BO | 📍 854113 | Pranpur | Branch Post Office |
| 772 | Kebala Milik | Pranpur BO | 📍 854116 | Pranpur | Branch Post Office |
| 773 | Kehunia | Gauripur BO | 📍 854116 | Pranpur | Branch Post Office |
| 774 | Kelabari | Dhena Bagchhata BO | 📍 854116 | Azamnagar | Branch Post Office |
| 775 | Kelabari | Fatehpur BO | 📍 855101 | Barsoi | Branch Post Office |
| 776 | Kelabari | Durgaganj SO | 📍 855105 | Kadwa | Post Office - PO |
| 777 | Keotia | Millik Palagarh BO | 📍 855114 | Pranpur | Branch Post Office |
| 778 | Keshopur | Pranpur BO | 📍 854116 | Pranpur | Branch Post Office |
| 779 | Keshopur | Mukuriya BO | 📍 854317 | Azamnagar | Branch Post Office |
| 780 | Keso Pur | Rosna SO | 📍 854117 | Amdabad | Post Office - PO |
| 781 | Kewat Tola | Sahja BO | 📍 854107 | Pranpur | Branch Post Office |
| 782 | Khagha Patti | Gurubazar SO | 📍 854104 | Barari | Post Office - PO |
| 783 | Khajuria | Mahadevpur SO Katihar | 📍 854116 | Pranpur | Post Office - PO |
| 784 | Khangawan | Porla BO | 📍 855102 | Azamnagar | Branch Post Office |
| 785 | Khanjarpur | Durgaganj SO | 📍 855105 | Kadwa | Post Office - PO |
| 786 | Khanua | Kalsar BO | 📍 854337 | Hasanganj | Branch Post Office |
| 787 | Kharbarar | Sauriya BO | 📍 854107 | katihar | Branch Post Office |
| 788 | Kharhi | Durgaganj SO | 📍 855105 | Kadwa | Post Office - PO |
| 789 | Kharitola | Dhena Bagchhata BO | 📍 854116 | Kadwa | Branch Post Office |
| 790 | Kharkata | Khudna Rupaspur BO | 📍 854303 | Korha | Branch Post Office |
| 791 | Kharsota | Salmari SO | 📍 855113 | Azamnagar | Post Office - PO |
| 792 | Kharua | Balupara BO | 📍 854317 | Barsoi | Branch Post Office |
| 793 | Khatiaha Badh | Kahariah BO | 📍 853204 | Kursela | Branch Post Office |
| 794 | Khatiaha Badh | Ayodhyaganj Bazar SO | 📍 854101 | Kursela | Post Office - PO |
| 795 | Khaura | Azamnagar BO | 📍 855113 | Azamnagar | Branch Post Office |
| 796 | Khawaspur | Durgaganj SO | 📍 855105 | Kadwa | Post Office - PO |
| 797 | Khempur | Chandpur BO | 📍 855105 | Kadwa | Branch Post Office |
| 798 | Khijirpur | Khirdirpur BO | 📍 855102 | Barsoi | Branch Post Office |
| 799 | Khiria | Korha SO | 📍 854108 | Korha | Post Office - PO |
| 800 | Khoda Baksh Chakla | Sameli BO | 📍 854101 | Sameli | Branch Post Office |