| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 2101 | Raimpur | Sirisia BO | 📍 841243 | Mairwa | Branch Post Office |
| 2102 | Raini | Rukundipur BO | 📍 841238 | Daraundha | Branch Post Office |
| 2103 | Raini | K.T.Bharouli BO | 📍 841404 | Daraundha | Post Office - PO |
| 2104 | Raini | K.T.Bharauli BO | 📍 841404 | Daraundha | Post Office - PO |
| 2105 | Raiti Chandi | Panjwar BO | 📍 841509 | Raghunathpur | Branch Post Office |
| 2106 | Rajanpur | Rajanpura BO | 📍 841236 | Hasanpura | Branch Post Office |
| 2107 | Rajanpura | Rajanpura BO | 📍 841236 | Hasanpura | Branch Post Office |
| 2108 | Rajanpura Tola | Rajanpura BO | 📍 841236 | Hasanpura | Branch Post Office |
| 2109 | Rajapur | Basantpur SO Siwan | 📍 841406 | Basantpur | Post Office - PO |
| 2110 | Rajapur | Kauria BO | 📍 841406 | Bhagwanpur Hat | Branch Post Office |
| 2111 | Rajapur | Chakia BO | 📍 841507 | Bhagwanpur Hat | Branch Post Office |
| 2112 | Rajeev Nagar | Siwan HO | 📍 841226 | Siwan | Head Post Office - H |
| 2113 | Rajendra service Station | Thepaha Bazar BO | 📍 841245 | Ziradei | Branch Post Office |
| 2114 | Rajendra Smarak | Zeradei SO | 📍 841245 | Ziradei | Post Office - PO |
| 2115 | Rajkia Pratmik Madhya Vidyalay Balia Patti Jalalpur | Jalalpur BO | 📍 841506 | Maharajganj | Branch Post Office |
| 2116 | Rajkia Pratmik Madhya Vidyalay Chandpur Jalalpur | Jalalpur BO | 📍 841506 | Maharajganj | Branch Post Office |
| 2117 | Rajkia Pratmik Madhya Vidyalay Jalalpur | Jalalpur BO | 📍 841506 | Maharajganj | Branch Post Office |
| 2118 | Rajkiya Madhya Vidyalay Chaukihasan | Chaukihasan BO | 📍 841506 | Barharia | Branch Post Office |
| 2119 | Rajkiya Madya Vidyalay | Pipra Naryan BO | 📍 841506 | Pachrukhi | Branch Post Office |
| 2120 | Rajkiya Makhtab Vidyalay | Bhartpura BO | 📍 841506 | Pachrukhi | Branch Post Office |
| 2121 | Rajkiya Prathmik Vidyalay Ahisi Chaukihasan | Chaukihasan BO | 📍 841506 | Barharia | Branch Post Office |
| 2122 | Rajkiya Prathmik Vidyalay Dakinpatti Chaukihasan | Chaukihasan BO | 📍 841506 | Barharia | Branch Post Office |
| 2123 | Rajkiya Prathmik Vidyalay Hakam | Bhartpura BO | 📍 841506 | Pachrukhi | Branch Post Office |
| 2124 | Rajkiya Utkrmit Vidyalay | Bhartpura BO | 📍 841506 | Pachrukhi | Branch Post Office |
| 2125 | Rajpur | Rajpur BO | 📍 841504 | Raghunathpur | Branch Post Office |
| 2126 | Rakashaha | Gaighat BO | 📍 841231 | Hasanpura | Branch Post Office |
| 2127 | Rakauli | Santhi BO | 📍 841502 | Andar | Branch Post Office |
| 2128 | Rakauli Khap | Santhi BO | 📍 841502 | Andar | Branch Post Office |
| 2129 | Rakhi Mahal Tarwara | Tarwara SO | 📍 841506 | Pachrukhi | Post Office - PO |
| 2130 | Ram Nagar | Amlori BO | 📍 841226 | Siwan | Branch Post Office |
| 2131 | Ram nagar | Balhu BO | 📍 841234 | Darauli | Branch Post Office |
| 2132 | Ram Nagar | Khalwa BO | 📍 841243 | Nautan | Branch Post Office |
| 2133 | Ram Nagar | Mania BO | 📍 841245 | Ziradei | Branch Post Office |
| 2134 | Ram Punak | Punak BO | 📍 841239 | Darauli | Branch Post Office |
| 2135 | Rama chhapra | K.T.Bharouli BO | 📍 841404 | Daraundha | Post Office - PO |
| 2136 | Ramapali | Chakra BO | 📍 841226 | Siwan | Branch Post Office |
| 2137 | Ramapatti Chapra | Jamuaon BO | 📍 841239 | Guthani | Branch Post Office |
| 2138 | Ramdim singh tola | English BO | 📍 841239 | Mairwa | Branch Post Office |
| 2139 | Ramgarh | Ramgarh BO | 📍 841203 | Siswan | Branch Post Office |
| 2140 | Ramgarh | Khalwa BO | 📍 841243 | Nautan | Branch Post Office |
| 2141 | Ramgarha | Ramgarh BO | 📍 841244 | Daraundha | Branch Post Office |
| 2142 | Ramgarha Bichila tola | Ramgarh BO | 📍 841244 | Daraundha | Branch Post Office |
| 2143 | Ramgarha Pachim tola | Ramgarh BO | 📍 841244 | Daraundha | Branch Post Office |
| 2144 | Ramgarha Purab tola | Ramgarh BO | 📍 841244 | Daraundha | Branch Post Office |
| 2145 | Ramnagar | Siwan HO | 📍 841226 | Siwan | Head Post Office - H |
| 2146 | Ramnagar | Rampur Ke Tola BO | 📍 841236 | Hasanpura | Branch Post Office |
| 2147 | Ramnagar kakaria Dih | Done SO | 📍 841235 | Darauli | Post Office - PO |
| 2148 | Rampur | Ramgarh BO | 📍 841203 | Siswan | Branch Post Office |
| 2149 | Rampur | Amlori BO | 📍 841226 | Siwan | Branch Post Office |
| 2150 | Rampur | Sarsar BO | 📍 841226 | Siwan | Branch Post Office |