| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 801 | Masumnagar urf Premnagar | Manikchowk SO | 📍 843323 | Runisaidpur | Post Office - PO |
| 802 | Masumnagar urf Premnagar | Prem Nagar Subhai BO | 📍 843323 | Runisaidpur | Branch Post Office |
| 803 | Mathwa Azrakbe Balua Arazi | Sankhi BO | 📍 843302 | Riga | Branch Post Office |
| 804 | Matiar Kalan | M. Kala BO | 📍 843317 | Bathnaha | Post Office - PO |
| 805 | Matiar Khurd | M. Kala BO | 📍 843317 | Bathnaha | Post Office - PO |
| 806 | Maudah | Maudah BO | 📍 843327 | Bathnaha | Branch Post Office |
| 807 | Maulla Nagar | K.Brahmtoli BO | 📍 843314 | Bajpatti | Branch Post Office |
| 808 | Mauna | P. Tajpur BO | 📍 843316 | Runisaidpur | Branch Post Office |
| 809 | Meghpur | Meghpur BO | 📍 843331 | Sursand | Branch Post Office |
| 810 | Meghpur | Sursand SO | 📍 843331 | Sursand | Post Office - PO |
| 811 | Mehsaul | Mehsaul BO | 📍 843328 | Runisaidpur | Branch Post Office |
| 812 | Mehsaul | Runnisaidpur SO | 📍 843328 | Runisaidpur | Post Office - PO |
| 813 | Mehthi | Belsand SO | 📍 843316 | Belsand | Post Office - PO |
| 814 | Mehthi | Chandauli Timha BO | 📍 843316 | Belsand | Branch Post Office |
| 815 | Mejar Ganj Malahi | Malahi BO | 📍 843331 | Majorganj | Branch Post Office |
| 816 | Methaura | Bishanpur BO | 📍 843302 | Dumra | Branch Post Office |
| 817 | Methaura | Sitamarhi Bazar SO | 📍 843302 | Dumra | Post Office - PO |
| 818 | Mill Tola | Rajopatti BO | 📍 843302 | Dumra | Branch Post Office |
| 819 | Mirijadpur urf Mirdadpur Narha | Harnahiya BO | 📍 843302 | Bathnaha | Branch Post Office |
| 820 | Mirijadpur urf Mirdadpur Narha | Sitamarhi Bazar SO | 📍 843302 | Bathnaha | Post Office - PO |
| 821 | Mirzapur | Bishanpur BO | 📍 843302 | Dumra | Branch Post Office |
| 822 | Mirzapur | Parmanandpur BO | 📍 843302 | Dumra | Branch Post Office |
| 823 | Mirzapur | Sitamarhi Bazar SO | 📍 843302 | Dumra | Post Office - PO |
| 824 | Mirzapur | Madaripur BO | 📍 843333 | Bajpatti | Branch Post Office |
| 825 | Misraulia | Paktola BO | 📍 843302 | Dumra | Branch Post Office |
| 826 | Misraulia | R.Gosaipur BO | 📍 843302 | Dumra | Branch Post Office |
| 827 | Mochhpa Kauni | B.Machhpakauni BO | 📍 843324 | Parihar | Branch Post Office |
| 828 | Mogalwa | B.Machacha BO | 📍 843314 | Dumra | Branch Post Office |
| 829 | Mohandih | Banchauri BO | 📍 843302 | Dumra | Branch Post Office |
| 830 | Mohandih | Sitamarhi Bazar SO | 📍 843302 | Dumra | Post Office - PO |
| 831 | Mohanpur | Bariyarpur BO | 📍 843302 | Dumra | Branch Post Office |
| 832 | Mohni Khurd | M.Mandal BO | 📍 843327 | Suppi | Branch Post Office |
| 833 | Mohni Madol | M.Mandal BO | 📍 843327 | Suppi | Branch Post Office |
| 834 | Mohni Sakrauli | M.Sakrauli BO | 📍 843326 | Nanpur | Branch Post Office |
| 835 | Mohuain | Madaripur BO | 📍 843333 | Bajpatti | Branch Post Office |
| 836 | Morang urf Bazidpur | P. Tajpur BO | 📍 843316 | Runisaidpur | Branch Post Office |
| 837 | Moraon | Pokhraira BO | 📍 843326 | Bokhara | Branch Post Office |
| 838 | Moraul | Maraul BO | 📍 843314 | Bajpatti | Branch Post Office |
| 839 | Muh Chatti | Bhutahi SO | 📍 843317 | Sonbarsa | Post Office - PO |
| 840 | Muh Chatti | Bagaha BO | 📍 843332 | Sonbarsa | Branch Post Office |
| 841 | Mujaulia | Narga BO | 📍 843324 | Parihar | Branch Post Office |
| 842 | Mujaulia | Bethuara BO | 📍 843324 | Parihar | Branch Post Office |
| 843 | Muradpur | Sitamarhi HO | 📍 843301 | Dumra | Head Post Office - H |
| 844 | Muradpur Narkatia | Narha BO | 📍 843327 | Suppi | Branch Post Office |
| 845 | Muraul urf Nanikpur | Rampur Bakhari BO | 📍 843325 | Parsauni | Branch Post Office |
| 846 | Murha Chhitauna | Bagaha BO | 📍 843332 | Sonbarsa | Branch Post Office |
| 847 | Murha Dih | Bagaha BO | 📍 843332 | Sonbarsa | Branch Post Office |
| 848 | Murha Ghat | Bagaha BO | 📍 843332 | Sonbarsa | Branch Post Office |
| 849 | Murlia Chak urf Majhaulia | Majhaulia Estate SO | 📍 843322 | Sursand | Post Office - PO |
| 850 | Mursand | Runnisaidpur SO | 📍 843328 | Runisaidpur | Post Office - PO |