| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1801 | Nai Bazar MAIRWA | Mairwa SO | 📍 841239 | Mairwa | Post Office - PO |
| 1802 | Nainijor | Bkulari BO | 📍 841239 | Guthani | Branch Post Office |
| 1803 | Nainpura | Nainpura BO | 📍 841241 | Pachrukhi | Branch Post Office |
| 1804 | Nanda Mura | Nandamura BO | 📍 841203 | Siswan | Branch Post Office |
| 1805 | Nanda tola | Rukundipur BO | 📍 841238 | Daraundha | Branch Post Office |
| 1806 | Nandpali | Bhaisakhal BO | 📍 841245 | Ziradei | Branch Post Office |
| 1807 | Nandpur Amwari | Nand Pur Amwari BO | 📍 841231 | Raghunathpur | Branch Post Office |
| 1808 | Nandumath ke tola | Bagaura SO | 📍 841404 | Daraundha | Post Office - PO |
| 1809 | Narahiya | Bargaon BO | 📍 841239 | Mairwa | Branch Post Office |
| 1810 | Narauli | Amarpur BO | 📍 841234 | Darauli | Branch Post Office |
| 1811 | Narayanpur | Darauli SO | 📍 841234 | Darauli | Post Office - PO |
| 1812 | Narayanpur | Pachrukhi SO | 📍 841241 | Pachrukhi | Post Office - PO |
| 1813 | Narayanpur | Sahpur SO | 📍 841243 | Nautan | Post Office - PO |
| 1814 | Narayanpur | Asaon SO | 📍 841287 | Andar | Post Office - PO |
| 1815 | Narayanpur | Hasua BO | 📍 841436 | Nautan | Branch Post Office |
| 1816 | Narendrapur | Narendrapur SO | 📍 841446 | Ziradei | Post Office - PO |
| 1817 | Narendrapur Narinpur | Narianpur BO | 📍 841245 | Ziradei | Branch Post Office |
| 1818 | Narhan | Narhan BO | 📍 841504 | Raghunathpur | Branch Post Office |
| 1819 | Narhan Diara | Narhan BO | 📍 841504 | Raghunathpur | Branch Post Office |
| 1820 | Narharpur | Kishunpura SO | 📍 841416 | Lakri Nabiganj | Post Office - PO |
| 1821 | Narharpur | Parwan BO | 📍 841428 | Barharia | Branch Post Office |
| 1822 | Narhat | Surwala BO | 📍 841227 | Pachrukhi | Branch Post Office |
| 1823 | Narkatia | Semaria BO | 📍 841243 | Nautan | Branch Post Office |
| 1824 | Narkatia | Semaria BO | 📍 841441 | Nautan | Branch Post Office |
| 1825 | Narkhi Chapra | Barhria SO | 📍 841232 | Barharia | Post Office - PO |
| 1826 | Naryanpur | Sanjalpur BO | 📍 841245 | Ziradei | Branch Post Office |
| 1827 | Nasir Chhapra | Madhopur BO | 📍 841232 | Barharia | Branch Post Office |
| 1828 | Nasopur Saraia | Barhria SO | 📍 841232 | Barharia | Post Office - PO |
| 1829 | Nathanpura | Bhartpura BO | 📍 841506 | Pachrukhi | Branch Post Office |
| 1830 | Nathpur | Habibnagar BO | 📍 841226 | Hussainganj | Branch Post Office |
| 1831 | Nathuchhap | Nathuchhap BO | 📍 841227 | Siwan | Branch Post Office |
| 1832 | Nauka Tola | B.P.Ekderwsa BO | 📍 841243 | Nautan | Branch Post Office |
| 1833 | Naupali | Chakra BO | 📍 841226 | Siwan | Branch Post Office |
| 1834 | Nauranga | Shakara BO | 📍 841506 | Pachrukhi | Branch Post Office |
| 1835 | Nautan | Gohpur Bajrahia BO | 📍 841238 | Maharajganj | Branch Post Office |
| 1836 | Nautan | Nautan BO | 📍 841243 | Nautan | Branch Post Office |
| 1837 | Nautan | Jamobazar SO | 📍 841413 | Goriakothi | Post Office - PO |
| 1838 | Nauwa tola | Basantpur SO Siwan | 📍 841406 | Bhagwanpur Hat | Post Office - PO |
| 1839 | Navadih | Khujhwa SO | 📍 841502 | Raghunathpur | Post Office - PO |
| 1840 | Nawada | Chainpur SO Siwan | 📍 841203 | Siswan | Post Office - PO |
| 1841 | Nawada | Mairwa SO | 📍 841239 | Mairwa | Post Office - PO |
| 1842 | Nawada | Sahuli BO | 📍 841286 | Hasanpura | Branch Post Office |
| 1843 | Nawada | Raghunathpur SO Siwan | 📍 841504 | Raghunathpur | Post Office - PO |
| 1844 | Nawada Diara | Raghunathpur SO Siwan | 📍 841504 | Raghunathpur | Post Office - PO |
| 1845 | Nawaka tola | Laxmiganj BO | 📍 841439 | Goriakothi | Branch Post Office |
| 1846 | Nawalpur | Ansar BO | 📍 841203 | Siswan | Branch Post Office |
| 1847 | Nawalpur | Barhria SO | 📍 841232 | Barharia | Post Office - PO |
| 1848 | Nawalpur | Badram BO | 📍 841241 | Hussainganj | Branch Post Office |
| 1849 | Nawalpur | Titra BO | 📍 841245 | Ziradei | Branch Post Office |
| 1850 | Nawalpur | Madhopur BO | 📍 841413 | Barharia | Branch Post Office |