| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 801 | Khaira | Chakthat BO | 📍 848210 | Rosera | Branch Post Office |
| 802 | Khaira | Udaipur BO | 📍 848210 | Rosera | Branch Post Office |
| 803 | Khairi | Khairi BO | 📍 848117 | Khanpur | Branch Post Office |
| 804 | Khairi | Masina BO | 📍 848117 | Khanpur | Branch Post Office |
| 805 | Khajautia | Ghataho BO | 📍 848114 | Dalsinghsarai | Branch Post Office |
| 806 | Khajepur Dakhli | Soman BO | 📍 848117 | Khanpur | Branch Post Office |
| 807 | Khajuri | Basudeopur BO | 📍 848102 | Kalyanpur | Branch Post Office |
| 808 | Khajuri | Akhtiarpur Khajuri BO | 📍 848114 | Sarairanjan | Branch Post Office |
| 809 | Khajuri | Khajuri BO | 📍 848301 | Kalyanpur | Branch Post Office |
| 810 | Khalispur | Khalispur BO | 📍 848505 | Sarairanjan | Branch Post Office |
| 811 | Khan Mirzapur | Khan Mirzapur BO | 📍 848503 | Vidyapati Nagar | Branch Post Office |
| 812 | Khanpur | Khanpur BO | 📍 848117 | Khanpur | Branch Post Office |
| 813 | Khanua | Keshonarainpur BO | 📍 848504 | Morwa | Branch Post Office |
| 814 | Khap Rahimpur Rudauli | Harpur Ailoth BO | 📍 848101 | Samastipur | Branch Post Office |
| 815 | Kharahia | Mangalgarh SO | 📍 848208 | Hasanpur | Post Office - PO |
| 816 | Kharaj | Chaita BO | 📍 848132 | Ujiarpur | Branch Post Office |
| 817 | Kharajpur Baraitha | Dashara BO | 📍 848501 | Mohiuddinagar | Branch Post Office |
| 818 | Khariban | Akhtiarpur BO | 📍 848127 | Sarairanjan | Branch Post Office |
| 819 | Kharidabad | Mohanpur BO | 📍 848101 | Samastipur | Branch Post Office |
| 820 | Kharsam | Ranna BO | 📍 847105 | Shivaji Nagar | Branch Post Office |
| 821 | Kharsand | Gobarsitha BO | 📍 847301 | Kalyanpur | Branch Post Office |
| 822 | Kharsand | K.Harsand BO | 📍 847301 | Kalyanpur | Branch Post Office |
| 823 | Khatuaha Bahuarpatti | Khairi BO | 📍 848117 | Khanpur | Branch Post Office |
| 824 | Khawas Tola | Kale Narpatnagar BO | 📍 848206 | Hasanpur | Branch Post Office |
| 825 | Khedarpur | Bahadurpur BO | 📍 848114 | Vidyapati Nagar | Branch Post Office |
| 826 | Khedarpur | Kancha BO | 📍 848503 | Vidyapati Nagar | Branch Post Office |
| 827 | Kheraj | Kharaj Jitwarpur BO | 📍 848134 | Warisnagar | Branch Post Office |
| 828 | Kheraj Gulam Haidar | Rampur Kushaiya BO | 📍 848301 | Warisnagar | Branch Post Office |
| 829 | Kheraj Nambar Eksath | Kharaj Jitwarpur BO | 📍 848134 | Samastipur | Branch Post Office |
| 830 | Kheraj Supaul | Taradhamaun BO | 📍 848504 | Patori | Branch Post Office |
| 831 | Kherpura | Tara BO | 📍 848209 | Singhia | Branch Post Office |
| 832 | Khesraha | Bahadurpur BO | 📍 848114 | Vidyapati Nagar | Branch Post Office |
| 833 | Khesraha | Kancha BO | 📍 848503 | Vidyapati Nagar | Branch Post Office |
| 834 | Khetapur | Manikpur BO | 📍 848127 | Sarairanjan | Branch Post Office |
| 835 | Khoksa | Madhopur BO | 📍 848211 | Dalsinghsarai | Branch Post Office |
| 836 | Khoksaha | Madhopur BO | 📍 848211 | Bibhutpur | Branch Post Office |
| 837 | Khota Tilakpur | Jagmohra BO | 📍 848207 | Bithan | Branch Post Office |
| 838 | Khurdia | Hassanpur S. Mill SO | 📍 848205 | Hasanpur | Branch Post Office |
| 839 | Khusunda | Sakarpura BO | 📍 848205 | Hasanpur | Branch Post Office |
| 840 | Khutauna | Jagmohra BO | 📍 848207 | Bithan | Branch Post Office |
| 841 | Kishanpur Yusuf | Kishanpur Yusuf BO | 📍 848505 | Sarairanjan | Branch Post Office |
| 842 | Kishunpur | Kishanpur SO Samastipur | 📍 848301 | Warisnagar | Post Office - PO |
| 843 | KIshunpur Tabhka | Pandit Tol Tabhka BO | 📍 848114 | Bibhutpur | Branch Post Office |
| 844 | Kishunpura | Kishanpur SO Samastipur | 📍 848301 | Warisnagar | Post Office - PO |
| 845 | Kjadirpur | Masina BO | 📍 848117 | Khanpur | Branch Post Office |
| 846 | Kodaria | M.T.Alampur BO | 📍 848236 | Bibhutpur | Branch Post Office |
| 847 | Koilam | Koilam BO | 📍 847301 | Kalyanpur | Branch Post Office |
| 848 | Koilwan | Gobarsitha BO | 📍 847301 | Kalyanpur | Branch Post Office |
| 849 | Kolhanta | Jhakhar BO | 📍 848216 | Shivaji Nagar | Branch Post Office |
| 850 | Kon Bajidpur | Koan Bajitpur BO | 📍 848113 | Samastipur | Branch Post Office |