| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 851 | Konaila | Konaila BO | 📍 848114 | Dalsinghsarai | Branch Post Office |
| 852 | Korsauli | Hassanpur S. Mill SO | 📍 848205 | Hasanpur | Branch Post Office |
| 853 | Kothia | Srichandpur Kothia BO | 📍 848122 | Tajpur | Branch Post Office |
| 854 | Kothia | Mahen BO | 📍 848208 | Singhia | Branch Post Office |
| 855 | Kothia | Rahiyar Kochi BO | 📍 848209 | Shivaji Nagar | Branch Post Office |
| 856 | Kua | Bithan SO | 📍 848207 | Bithan | Post Office - PO |
| 857 | Kubauli Baso | Kubouliram BO | 📍 848131 | Tajpur | Branch Post Office |
| 858 | Kubauli Ram | Kubouliram BO | 📍 848131 | Pusa | Branch Post Office |
| 859 | Kukni | Hasanpur BO | 📍 848205 | Hasanpur | Branch Post Office |
| 860 | Kukni | Hassanpur S. Mill SO | 📍 848205 | Hasanpur | Branch Post Office |
| 861 | Kumaia | Kumaiya BO | 📍 848505 | Morwa | Branch Post Office |
| 862 | Kumaiya | Mohiuddin Nagar SO | 📍 848501 | Mohiuddinagar | Post Office - PO |
| 863 | Kumarchak | B.Chaksekhu BO | 📍 848114 | Dalsinghsarai | Branch Post Office |
| 864 | Kundal | Kundal SO Samastipur | 📍 848206 | Singhia | Post Office - PO |
| 865 | Kurhwa | Belsandi BO | 📍 848302 | Kalyanpur | Branch Post Office |
| 866 | Kurhwa | Kurba Barhetta BO | 📍 848302 | Kalyanpur | Branch Post Office |
| 867 | Kurman | Bhatwan BO | 📍 848206 | Hasanpur | Branch Post Office |
| 868 | Kursaha | Kursaha BO | 📍 848501 | Mohiuddinagar | Branch Post Office |
| 869 | Kusshawaha Tola | Bishanpur Bathua BO | 📍 848115 | Pusa | Branch Post Office |
| 870 | Kusum Barhenda | Ghataho BO | 📍 848114 | Dalsinghsarai | Branch Post Office |
| 871 | Kutubpur | Baghra SO Samastipur | 📍 848506 | Mohanpur | Post Office - PO |
| 872 | Labahatta | Chhatneshwar BO | 📍 848301 | Warisnagar | Branch Post Office |
| 873 | Labtolia | Kundal SO Samastipur | 📍 848206 | Singhia | Post Office - PO |
| 874 | Lachhminia | Narpa BO | 📍 848207 | Bithan | Branch Post Office |
| 875 | Lachhrampur | Jitwaria BO | 📍 848302 | Kalyanpur | Branch Post Office |
| 876 | Lad Kapasia | Belsandi BO | 📍 848207 | Bithan | Branch Post Office |
| 877 | Lad Kapasia | Salha Buzurg BO | 📍 848207 | Bithan | Branch Post Office |
| 878 | Lada | Lilhaul BO | 📍 848209 | Singhia | Branch Post Office |
| 879 | Ladaura | Ladaura Dargah BO | 📍 848302 | Kalyanpur | Branch Post Office |
| 880 | Lagma | Jahangirpur Lagma BO | 📍 848208 | Singhia | Branch Post Office |
| 881 | Lagunia | Lagunia BO | 📍 848504 | Patori | Branch Post Office |
| 882 | Lagunia Raghu Kanth | Lagunia Raghukanth BO | 📍 848101 | Samastipur | Branch Post Office |
| 883 | Lagunia Raghukanth BO | Lagunia Raghukanth BO | 📍 848103 | Samastipur | Branch Post Office |
| 884 | Lagunia Suraj kanth | Lagunia Surya Kanth BO | 📍 848101 | Samastipur | Branch Post Office |
| 885 | Lagunia Surajkanth | Lagunia Surya Kanth BO | 📍 848101 | Sarairanjan | Branch Post Office |
| 886 | Lagunia Surya Kanth BO | Lagunia Surya Kanth BO | 📍 848103 | Samastipur | Branch Post Office |
| 887 | Lagwa | Musapur BO | 📍 848114 | Sarairanjan | Branch Post Office |
| 888 | Lakhanpatti | Kashore BO | 📍 848133 | Warisnagar | Branch Post Office |
| 889 | Lakhanpur | Mohiuddin Nagar R.S SO | 📍 848502 | Mohiuddinagar | Branch Post Office |
| 890 | Lakhminia | Sonsa BO | 📍 848209 | Singhia | Branch Post Office |
| 891 | Lakhmipur Maheshpatti Deal | L.M.Patti BO | 📍 848132 | Ujiarpur | Branch Post Office |
| 892 | Lakhnipur Tara | Mohiuddin Nagar R.S SO | 📍 848502 | Mohiuddinagar | Branch Post Office |
| 893 | Lalpur | Muradpur BO | 📍 848210 | Rosera | Branch Post Office |
| 894 | Lalpur | Sonupur BO | 📍 848210 | Rosera | Branch Post Office |
| 895 | Larua | Larua BO | 📍 848505 | Morwa | Branch Post Office |
| 896 | Lat Basepura | L.B.Pura BO | 📍 848101 | Sarairanjan | Branch Post Office |
| 897 | Laxmipur | Hassanpur S. Mill SO | 📍 848205 | Hasanpur | Branch Post Office |
| 898 | Laxmipur | Baidyanathpur BO | 📍 848210 | Rosera | Branch Post Office |
| 899 | Laxmipur | Rosera SO | 📍 848210 | Rosera | Post Office - PO |
| 900 | LBPura BO | LBPura BO | 📍 848103 | Samastipur | Branch Post Office |