| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1601 | Majhaulia | Barheya BO | 📍 841226 | Siwan | Branch Post Office |
| 1602 | Majhaulia | Sahlaur BO | 📍 841227 | Pachrukhi | Branch Post Office |
| 1603 | Majhaulia | Krom BO | 📍 841239 | Darauli | Branch Post Office |
| 1604 | Majhaulia | Hatimpur BO | 📍 841413 | Goriakothi | Branch Post Office |
| 1605 | Majhawalia | Bishwar BO | 📍 841239 | Guthani | Branch Post Office |
| 1606 | Majhwa | Pachlakhi BO | 📍 841436 | Siwan | Branch Post Office |
| 1607 | Majhwalia | Chhitanpur BO | 📍 841245 | Ziradei | Branch Post Office |
| 1608 | Makhanupur | Siswan Kala BO | 📍 841236 | Siswan | Branch Post Office |
| 1609 | Makhdumpur | Chakia BO | 📍 841507 | Bhagwanpur Hat | Branch Post Office |
| 1610 | Makhnupur | Pachrukhi SO | 📍 841241 | Pachrukhi | Post Office - PO |
| 1611 | Makundpur | Bhaisakhal BO | 📍 841245 | Ziradei | Branch Post Office |
| 1612 | Malahari Tola | Punak BO | 📍 841239 | Darauli | Branch Post Office |
| 1613 | Malahi tola | Agya BO | 📍 841439 | Goriakothi | Branch Post Office |
| 1614 | Malahidih | Aranda BO | 📍 841236 | Hasanpura | Branch Post Office |
| 1615 | Malchaur | Jamuaon BO | 📍 841239 | Guthani | Branch Post Office |
| 1616 | Malchaur | Talli BO | 📍 841239 | Guthani | Branch Post Office |
| 1617 | Malgodam Mairwa | Mairwa SO | 📍 841239 | Mairwa | Post Office - PO |
| 1618 | Mali Tola | Rafipur BO | 📍 841286 | Hasanpura | Branch Post Office |
| 1619 | Malikan | Harihans BO | 📍 841286 | Hussainganj | Branch Post Office |
| 1620 | Malmalia | Basantpur SO Siwan | 📍 841406 | Basantpur | Post Office - PO |
| 1621 | Malupur | Pachrukhi SO | 📍 841241 | Pachrukhi | Post Office - PO |
| 1622 | Malviya Nagar | Siwan HO | 📍 841226 | Siwan | Head Post Office - H |
| 1623 | Mamaur | Guthni SO | 📍 841435 | Guthani | Post Office - PO |
| 1624 | Manan Patti | Bhagwanpur Hat SO | 📍 841408 | Bhagwanpur Hat | Post Office - PO |
| 1625 | Manan Patti | Sondhani BO | 📍 841408 | Bhagwanpur Hat | Branch Post Office |
| 1626 | Mananpura | Tethli BO | 📍 841232 | Barharia | Post Office - PO |
| 1627 | Manara | Gayaspur BO | 📍 841210 | Siswan | Branch Post Office |
| 1628 | Manchha | Bagaura SO | 📍 841404 | Daraundha | Post Office - PO |
| 1629 | Mandir road Mairwa | Mairwa SO | 📍 841239 | Mairwa | Post Office - PO |
| 1630 | Mandrapali | Merhi BO | 📍 841240 | Hasanpura | Branch Post Office |
| 1631 | Mandrauli | Mandrauli BO | 📍 841233 | Hasanpura | Branch Post Office |
| 1632 | Mania | Mania BO | 📍 841245 | Ziradei | Branch Post Office |
| 1633 | Manian | Mania BO | 📍 841245 | Ziradei | Branch Post Office |
| 1634 | Maniphora | Agya BO | 📍 841439 | Goriakothi | Branch Post Office |
| 1635 | Manjha nand | Bhikhpur Bhgwanpur BO | 📍 841236 | Siswan | Branch Post Office |
| 1636 | Manjharia | Aranda BO | 📍 841236 | Hasanpura | Branch Post Office |
| 1637 | Manjharia | Bhikhpur Bhgwanpur BO | 📍 841236 | Siswan | Branch Post Office |
| 1638 | Manjharia | Molnapur BO | 📍 841406 | Basantpur | Branch Post Office |
| 1639 | Manjhariya | Chainpur Hata BO | 📍 841243 | Nautan | Branch Post Office |
| 1640 | Manpur | Gohpur Bajrahia BO | 📍 841238 | Maharajganj | Branch Post Office |
| 1641 | Manpur Pateji | Asaon SO | 📍 841287 | Andar | Post Office - PO |
| 1642 | Manrar Kalan | Chorma BO | 📍 841406 | Bhagwanpur Hat | Branch Post Office |
| 1643 | Mansahata | Tethli BO | 📍 841232 | Barharia | Post Office - PO |
| 1644 | Marachhi | Semaria BO | 📍 841243 | Nautan | Branch Post Office |
| 1645 | Marachhi | Sughri BO | 📍 841406 | Bhagwanpur Hat | Branch Post Office |
| 1646 | Marachhi | Goreakothi SO | 📍 841434 | Goriakothi | Post Office - PO |
| 1647 | Marachhi | Semaria BO | 📍 841441 | Nautan | Branch Post Office |
| 1648 | Marachi | Marachhi BO | 📍 841434 | Lakri Nabiganj | Branch Post Office |
| 1649 | Marar Kala & Khurd | Chorma BO | 📍 841406 | Bhagwanpur Hat | Branch Post Office |
| 1650 | Mardanpur | Takipur SO | 📍 841244 | Maharajganj | Post Office - PO |