| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 701 | Khaira Kunji | Khaira Kunji BO | 📍 847101 | Bahadurpur | Branch Post Office |
| 702 | Khaisa | Jakso Jamalpur BO | 📍 847203 | Kiratpur | Branch Post Office |
| 703 | Khaisa | Laxmipur Kakorba BO | 📍 847203 | Kiratpur | Branch Post Office |
| 704 | Khajuri | Bijuli BO | 📍 847115 | Darbhanga | Branch Post Office |
| 705 | Khajurwara | Jahangirtola BO | 📍 847303 | Jale | Branch Post Office |
| 706 | Khalasin | Kuseshwar Asthan SO | 📍 848213 | Kusheshwar Asthan Purbi | Post Office - PO |
| 707 | Khamhan | Mahinam BO | 📍 847103 | Benipur | Branch Post Office |
| 708 | Kharari | K.Harari BO | 📍 847301 | Baheri | Branch Post Office |
| 709 | Kharthua | Bijuli BO | 📍 847115 | Darbhanga | Branch Post Office |
| 710 | Kharua | Kharua BO | 📍 847115 | Darbhanga | Branch Post Office |
| 711 | Kheraj | Jogiara SO | 📍 847303 | Jale | Post Office - PO |
| 712 | Kheraj Bela | Kabirchak BO | 📍 846009 | Darbhanga | Branch Post Office |
| 713 | Kheraj Dhuria | Chhacha BO | 📍 847337 | Keotiranway | Branch Post Office |
| 714 | Kheraj Kamrauli | Kamrouli BO | 📍 847428 | Bahadurpur | Branch Post Office |
| 715 | Kheraj Mardan Singh | Barhi BO | 📍 846005 | Keotiranway | Branch Post Office |
| 716 | Kheraj Phulthua | Banauli BO | 📍 847428 | Singhwara | Branch Post Office |
| 717 | Kheraj Shahpur | Lalsahpur BO | 📍 846005 | Bahadurpur | Branch Post Office |
| 718 | Kherajpur | Laheriasarai HO | 📍 846001 | Bahadurpur | Head Post Office - H |
| 719 | Kherajpur | Kharajpur BO | 📍 846003 | Bahadurpur | Branch Post Office |
| 720 | Khesaraha | Bhindua BO | 📍 848213 | Kusheshwar Asthan Purbi | Branch Post Office |
| 721 | Khesraha | Kuseshwar Asthan SO | 📍 848213 | Kusheshwar Asthan | Post Office - PO |
| 722 | Khidarpura | Sarisavpahi SO | 📍 847424 | Tardih | Post Office - PO |
| 723 | Khirma | Khirma BO | 📍 847121 | Keotiranway | Branch Post Office |
| 724 | Khodadadpur | Sonki BO | 📍 846009 | Darbhanga | Branch Post Office |
| 725 | Khojkipur | Sonki BO | 📍 846009 | Bahadurpur | Branch Post Office |
| 726 | Khotas Kalana | Aurahi BO | 📍 847203 | Kusheshwar Asthan | Branch Post Office |
| 727 | Khusro Sarae | Panchobe BO | 📍 846003 | Hanumannagar | Branch Post Office |
| 728 | Khutwara | Kabaria Khutwara BO | 📍 846009 | Darbhanga | Branch Post Office |
| 729 | Kiratpur | Manigachi SO | 📍 847422 | Alinagar | Post Office - PO |
| 730 | Kiratpur | Baghras BO | 📍 847427 | Kiratpur | Branch Post Office |
| 731 | Kishunpur | Laheriasarai HO | 📍 846001 | Bahadurpur | Head Post Office - H |
| 732 | Kishunpur | B.K.Asthan BO | 📍 846005 | Keotiranway | Branch Post Office |
| 733 | Kishunpur | Nawada BO | 📍 847201 | Benipur | Branch Post Office |
| 734 | Kodra | Simartoka BO | 📍 848213 | Kusheshwar Asthan | Branch Post Office |
| 735 | Koilathan | B.K.Asthan BO | 📍 846005 | Keotiranway | Branch Post Office |
| 736 | Kokat | Ughra BO | 📍 847101 | Bahadurpur | Branch Post Office |
| 737 | Kokraha | Kakorha BO | 📍 847204 | Tardih | Branch Post Office |
| 738 | Kola | Usri BO | 📍 848213 | Kusheshwar Asthan Purbi | Branch Post Office |
| 739 | Kolatoka | Ujua BO | 📍 848213 | Kusheshwar Asthan Purbi | Branch Post Office |
| 740 | Kolhatta | P.Basant BO | 📍 846003 | Hanumannagar | Branch Post Office |
| 741 | Kolwara | Narsara BO | 📍 846003 | Hanumannagar | Branch Post Office |
| 742 | Kopgarh | Pacharhi BO | 📍 847337 | Keotiranway | Branch Post Office |
| 743 | Kora | Kora BO | 📍 847104 | Singhwara | Branch Post Office |
| 744 | Korauni | Ashthua BO | 📍 847104 | Singhwara | Branch Post Office |
| 745 | Kortho Part in Alinagar * | Korthu BO | 📍 847103 | Ghanshyampur | Branch Post Office |
| 746 | Kortho Part in Ghanshyampur * | Korthu BO | 📍 847103 | Alinagar | Branch Post Office |
| 747 | Kothia | Kothia BO | 📍 847306 | Keotiranway | Branch Post Office |
| 748 | Kothli Majhiama | K.Manjhigama BO | 📍 847306 | Keotiranway | Branch Post Office |
| 749 | Kothra | Kothra BO | 📍 847105 | Baheri | Branch Post Office |
| 750 | Kothram | Kothram BO | 📍 847203 | Gora Bauram | Branch Post Office |