| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 801 | Masarhia | Hethua BO | 📍 802122 | Rajpur | Branch Post Office |
| 802 | Mathauli | Basaon Kalan BO | 📍 802129 | Itarhi | Branch Post Office |
| 803 | Mathia | Karhshi BO | 📍 802102 | Buxar | Branch Post Office |
| 804 | Mathia Gurdas | Nadaoan BO | 📍 802103 | Buxar | Branch Post Office |
| 805 | Mathila | Mathila BO | 📍 802126 | Dumraon | Branch Post Office |
| 806 | Matukipur | Manikpur BO | 📍 802128 | Rajpur | Branch Post Office |
| 807 | Matukpur | Kakaria BO | 📍 802117 | Rajpur | Branch Post Office |
| 808 | Maudiha | Sikraul BO | 📍 802129 | Nawanagar | Branch Post Office |
| 809 | Menhmarara | Raghunathpur SO Buxar | 📍 802134 | Barhampur | Post Office - PO |
| 810 | Mianpur | Rampur BO | 📍 802114 | Chausa | Branch Post Office |
| 811 | Milki | Karhshi BO | 📍 802102 | Buxar | Branch Post Office |
| 812 | Milki Bisupur | Mahuar BO | 📍 802112 | Barhampur | Branch Post Office |
| 813 | Minapur Ditto | Balua BO | 📍 802130 | Chakki | Branch Post Office |
| 814 | Mirchi | Mahila BO | 📍 802123 | Dumraon | Branch Post Office |
| 815 | Misraulia | Kamarpur BO | 📍 802102 | Buxar | Branch Post Office |
| 816 | Misraulia | Karhshi BO | 📍 802102 | Itarhi | Branch Post Office |
| 817 | Misraulia | Umarpur Diar BO | 📍 802118 | Buxar | Branch Post Office |
| 818 | Misraulia | Dumraon SO | 📍 802119 | Dumraon | Post Office - PO |
| 819 | Misraulia | Kasia BO | 📍 802126 | Dumraon | Branch Post Office |
| 820 | Misrauliya | Kamarpur BO | 📍 802102 | Buxar | Branch Post Office |
| 821 | Misrauliya | Rani Singhanpura BO | 📍 802120 | Simri | Branch Post Office |
| 822 | Mitanpura | Atrauna BO | 📍 802123 | Itarhi | Branch Post Office |
| 823 | Mobarakpur | Itarhian BO | 📍 802117 | Rajpur | Branch Post Office |
| 824 | Mohammadpur | Naya Bhojpur BO | 📍 802133 | Dumraon | Branch Post Office |
| 825 | Mohanpur | Sarenja BO | 📍 802114 | Itarhi | Branch Post Office |
| 826 | Mohanpur | Dhansoi SO | 📍 802117 | Rajpur | Post Office - PO |
| 827 | Mohanpur | Nenua BO | 📍 802119 | Dumraon | Branch Post Office |
| 828 | Mohanpur | Kharahatand BO | 📍 802120 | Simri | Branch Post Office |
| 829 | Mohanpurwa | Chunni BO | 📍 802114 | Chausa | Branch Post Office |
| 830 | Moharihan | Moharihan BO | 📍 802128 | Rajpur | Branch Post Office |
| 831 | Mohrihan | Rasen BO | 📍 802128 | Rajpur | Branch Post Office |
| 832 | Mugaon | Mugaon BO | 📍 802126 | Dumraon | Branch Post Office |
| 833 | Mungasi | Attaon BO | 📍 802119 | Dumraon | Branch Post Office |
| 834 | Mungraul | Umarpur Diar BO | 📍 802118 | Buxar | Branch Post Office |
| 835 | Murar | Murar SO | 📍 802127 | Chaugain | Post Office - PO |
| 836 | Murarpur | Unwas BO | 📍 802123 | Itarhi | Branch Post Office |
| 837 | Murarpur | Girdhar Baraon BO | 📍 802127 | Itarhi | Branch Post Office |
| 838 | Murarpur | Rampur BO | 📍 802127 | Itarhi | Branch Post Office |
| 839 | Murtazapur | Sukarwalia BO | 📍 802114 | Itarhi | Branch Post Office |
| 840 | Mustafapur | Unwas BO | 📍 802123 | Itarhi | Branch Post Office |
| 841 | Mustafapur | Naya Bhojpur BO | 📍 802133 | Dumraon | Branch Post Office |
| 842 | Nachap | Nachap BO | 📍 802134 | Chaugain | Branch Post Office |
| 843 | Nadaon | Nadaoan BO | 📍 802103 | Buxar | Branch Post Office |
| 844 | Nag Amirta | Keshopur BO | 📍 802113 | Simri | Branch Post Office |
| 845 | Nag Singhanpura | Barka Singhanpura BO | 📍 802120 | Simri | Branch Post Office |
| 846 | Nagarpura | Nagpura BO | 📍 802118 | Simri | Branch Post Office |
| 847 | Nagpur | Nagpur BO | 📍 802122 | Rajpur | Branch Post Office |
| 848 | Nagpura | Barka Singhanpura BO | 📍 802120 | Simri | Branch Post Office |
| 849 | Nagwan Jagdish | Asha Parari BO | 📍 802135 | Simri | Branch Post Office |
| 850 | Nagwan Kalika | Asha Parari BO | 📍 802135 | Simri | Branch Post Office |