| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1001 | Manikpur | Fatehpur BO | 📍 854335 | Balrampur | Branch Post Office |
| 1002 | Manman | Manman BO | 📍 854317 | Barsoi | Branch Post Office |
| 1003 | Manoharpur | Manihari SO | 📍 854113 | Manihari | Post Office - PO |
| 1004 | Mansahi | Mansahi BO | 📍 854103 | Mansahi | Branch Post Office |
| 1005 | Mansh Hahi | Mansahi BO | 📍 854103 | Mansahi | Branch Post Office |
| 1006 | Mansh Hahi Kebala | Mansahi BO | 📍 854103 | Mansahi | Branch Post Office |
| 1007 | Mansingha | Mirjapur BO | 📍 855117 | Korha | Branch Post Office |
| 1008 | Manullahpur | Salmari SO | 📍 855113 | Kadwa | Post Office - PO |
| 1009 | Manullahpur Kadam Gachhi | Shitalpur Onkar BO | 📍 854317 | Barsoi | Branch Post Office |
| 1010 | Maraghia B O | Maraghia BO | 📍 854104 | Barari | Branch Post Office |
| 1011 | Marghia | Maraghia BO | 📍 854104 | Barari | Branch Post Office |
| 1012 | Marhi | Azamnagar BO | 📍 855113 | Azamnagar | Branch Post Office |
| 1013 | Maria | Dhena Bagchhata BO | 📍 854116 | Azamnagar | Branch Post Office |
| 1014 | Maria | Balia Belon BO | 📍 855113 | Kadwa | Branch Post Office |
| 1015 | Marjadpur | Fatehpur BO | 📍 855101 | Barsoi | Branch Post Office |
| 1016 | Marocha | Pranpur BO | 📍 854116 | Pranpur | Branch Post Office |
| 1017 | Marpa Balua | Sujapur BO | 📍 854115 | Barari | Branch Post Office |
| 1018 | Marwa | Gurubazar SO | 📍 854104 | Korha | Post Office - PO |
| 1019 | Masanpur | Dhachna BO | 📍 854317 | Barsoi | Branch Post Office |
| 1020 | Maskan Bhawanipur Milik | Madarichak BO | 📍 854113 | Manihari | Branch Post Office |
| 1021 | Masnadpur | Salmari SO | 📍 855113 | Azamnagar | Post Office - PO |
| 1022 | Matbari | Dangal BO | 📍 854317 | Barsoi | Branch Post Office |
| 1023 | Mathurapur | Mathurapur BO | 📍 855102 | katihar | Branch Post Office |
| 1024 | Mathurapur Milik | Barsoi SO | 📍 855102 | Barsoi | Post Office - PO |
| 1025 | Matian | Bighor BO | 📍 854317 | Balrampur | Branch Post Office |
| 1026 | Matiari Milik | Bighor BO | 📍 854317 | Balrampur | Branch Post Office |
| 1027 | Maula Nagar Chakla | Moula Nagar BO | 📍 854101 | Sameli | Branch Post Office |
| 1028 | Mednipur | Manihari SO | 📍 854113 | Manihari | Post Office - PO |
| 1029 | Mehdai | Dalan BO | 📍 854106 | katihar | Branch Post Office |
| 1030 | Mehdibari | Sadapur BO | 📍 855113 | Azamnagar | Branch Post Office |
| 1031 | Merhaul | Kadwa BO | 📍 855114 | Kadwa | Branch Post Office |
| 1032 | Mianpur | Narayanpur BO | 📍 854113 | Manihari | Branch Post Office |
| 1033 | Middle School | Katihar Mill SO | 📍 854107 | katihar | Post Office - PO |
| 1034 | Middle School -3 | Kuretha' BO | 📍 854107 | katihar | Branch Post Office |
| 1035 | Mijli | Azamnagar BO | 📍 855113 | Pranpur | Branch Post Office |
| 1036 | Milik Gachh | K.N. Guru Mela BO | 📍 854104 | Barari | Branch Post Office |
| 1037 | Milikpur | Bighor BO | 📍 854317 | Balrampur | Branch Post Office |
| 1038 | Milikpur Milik | Bighor BO | 📍 854317 | Balrampur | Branch Post Office |
| 1039 | Miliktoli | Bighor BO | 📍 854317 | Balrampur | Branch Post Office |
| 1040 | Millik Palagarh B O | Millik Palagarh BO | 📍 855114 | Kadwa | Branch Post Office |
| 1041 | Minapur | Salmari SO | 📍 855113 | Kadwa | Post Office - PO |
| 1042 | Mir Bhattan Milik | Morsanda BO | 📍 854108 | Falka | Branch Post Office |
| 1043 | Mir Milik | K.N. Guru Mela BO | 📍 854104 | Barari | Branch Post Office |
| 1044 | Mir Milik | Salepur BO | 📍 854114 | Falka | Branch Post Office |
| 1045 | Mirchai | Katihar HO | 📍 854105 | katihar | Head Post Office - H |
| 1046 | Mirpokhar | Sudhani RS BO | 📍 854317 | Barsoi | Branch Post Office |
| 1047 | Mirwan Milik | K.N. Guru Mela BO | 📍 854104 | Barari | Branch Post Office |
| 1048 | Mirzadpur | Fatehpur BO | 📍 854335 | Balrampur | Branch Post Office |
| 1049 | Mirzadpur | Fatehpur BO | 📍 855101 | Barsoi | Branch Post Office |
| 1050 | Mirzadpur | Salmari SO | 📍 855113 | Kadwa | Post Office - PO |