| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1651 | Mardapur | Barhan Bazar BO | 📍 841227 | Siwan | Branch Post Office |
| 1652 | Mardhanpur | Ramgarh BO | 📍 841244 | Daraundha | Branch Post Office |
| 1653 | Marera | Murena BO | 📍 841235 | Darauli | Branch Post Office |
| 1654 | Markan | Markan BO | 📍 841226 | Hussainganj | Branch Post Office |
| 1655 | Markan Bin Toli | Markan BO | 📍 841226 | Hussainganj | Branch Post Office |
| 1656 | Markan BO | Markan BO | 📍 841228 | Siwan | Branch Post Office |
| 1657 | Marsara | Rukundipur BO | 📍 841238 | Daraundha | Branch Post Office |
| 1658 | Marwatia | Panjwar BO | 📍 841509 | Raghunathpur | Branch Post Office |
| 1659 | Masudaha | Jaijore BO | 📍 841231 | Andar | Branch Post Office |
| 1660 | Matanpura | Bhagwanpur Hat SO | 📍 841408 | Bhagwanpur Hat | Post Office - PO |
| 1661 | Mathia | Gayaspur BO | 📍 841210 | Siswan | Branch Post Office |
| 1662 | Mathia | Ghurghat BO | 📍 841210 | Siswan | Branch Post Office |
| 1663 | Mathia | Faridpur BO | 📍 841231 | Andar | Branch Post Office |
| 1664 | Mathia | Tiyan BO | 📍 841231 | Andar | Branch Post Office |
| 1665 | Mathia | Laheji BO | 📍 841233 | Hasanpura | Branch Post Office |
| 1666 | Mathia | Mathia BO | 📍 841235 | Darauli | Branch Post Office |
| 1667 | Mathia | Siswan Kala BO | 📍 841236 | Siswan | Branch Post Office |
| 1668 | Mathia | Rukundipur BO | 📍 841238 | Daraundha | Branch Post Office |
| 1669 | Mathia | Sahpur SO | 📍 841243 | Mairwa | Post Office - PO |
| 1670 | Mathia | Makariyar BO | 📍 841245 | Ziradei | Branch Post Office |
| 1671 | Mathia | Basantpur SO Siwan | 📍 841406 | Basantpur | Post Office - PO |
| 1672 | Mathia | Goreakothi SO | 📍 841434 | Goriakothi | Post Office - PO |
| 1673 | Mathia | Karsar BO | 📍 841504 | Raghunathpur | Branch Post Office |
| 1674 | Mathia Bachangir | Tarwaparsa BO | 📍 841240 | Hasanpura | Branch Post Office |
| 1675 | Mathia Naya Bazar | Basantpur SO Siwan | 📍 841406 | Basantpur | Post Office - PO |
| 1676 | Mathia Patarhatha | Harihar Pur Lalgarh BO | 📍 841434 | Barharia | Branch Post Office |
| 1677 | Mathia Punak Buzurg | Punak BO | 📍 841239 | Darauli | Branch Post Office |
| 1678 | Mathurapur | B.A. Pakwalia BO | 📍 841438 | Barharia | Branch Post Office |
| 1679 | Matuk Chhapra | Barkagaon BO | 📍 841226 | Pachrukhi | Branch Post Office |
| 1680 | Mauje | Hardia BO | 📍 841226 | Pachrukhi | Branch Post Office |
| 1681 | Mauje Punak | Punak BO | 📍 841239 | Darauli | Branch Post Office |
| 1682 | Maula nagar | Jiyan BO | 📍 841226 | Siwan | Branch Post Office |
| 1683 | Mauri Maksuspur | Chakia BO | 📍 841507 | Bhagwanpur Hat | Branch Post Office |
| 1684 | Mauzachakki Diara Sultanpur | Raghunathpur SO Siwan | 📍 841504 | Raghunathpur | Post Office - PO |
| 1685 | Maya Nagar | Pipra BO | 📍 841244 | Maharajganj | Branch Post Office |
| 1686 | Mazilsa | Panjwar BO | 📍 841509 | Raghunathpur | Branch Post Office |
| 1687 | Meghwar | Sarari BO | 📍 841434 | Goriakothi | Branch Post Office |
| 1688 | Mehana | Sughri BO | 📍 841406 | Bhagwanpur Hat | Branch Post Office |
| 1689 | Menhdar | Chainpur SO Siwan | 📍 841203 | Siswan | Post Office - PO |
| 1690 | Mensa Hatta | Hardia BO | 📍 841404 | Barharia | Post Office - PO |
| 1691 | Merahi | Merhi BO | 📍 841240 | Hasanpura | Branch Post Office |
| 1692 | Merhi | Merhi BO | 📍 841240 | Hasanpura | Branch Post Office |
| 1693 | Mian Gondi | Daraila BO | 📍 841239 | Guthani | Branch Post Office |
| 1694 | Mianchandi | Gabhirar SO | 📍 841509 | Raghunathpur | Post Office - PO |
| 1695 | Middile School Karanpura Bazar | Karanpura BO | 📍 841506 | Goriakothi | Branch Post Office |
| 1696 | Middle school | Piprahiya BO | 📍 841245 | Ziradei | Branch Post Office |
| 1697 | Middle School Dindayalpur | Dindayalpur BO | 📍 841506 | Barharia | Branch Post Office |
| 1698 | Milki | P.Harsar BO | 📍 841233 | Daraundha | Post Office - PO |
| 1699 | Milki Madhwapur | P.Harsar BO | 📍 841233 | Daraundha | Post Office - PO |
| 1700 | Mir hata | Bankat BO | 📍 841422 | Bhagwanpur Hat | Branch Post Office |