| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1201 | Jiyan | Jiyan BO | 📍 841226 | Siwan | Branch Post Office |
| 1202 | Joga Pur Bazar | Jogapur Kothi BO | 📍 841413 | Barharia | Branch Post Office |
| 1203 | Jogapur | Chorma BO | 📍 841406 | Bhagwanpur Hat | Branch Post Office |
| 1204 | Jogapur | Kailgarh BO | 📍 841438 | Barharia | Branch Post Office |
| 1205 | Jogapur Kothi School | Jogapur Kothi BO | 📍 841413 | Barharia | Branch Post Office |
| 1206 | Jogapur Utar Tola | Jogapur Kothi BO | 📍 841413 | Barharia | Branch Post Office |
| 1207 | Jorapur | Nand Pur Amwari BO | 📍 841231 | Raghunathpur | Branch Post Office |
| 1208 | Juaphar | Chakia BO | 📍 841507 | Bhagwanpur Hat | Branch Post Office |
| 1209 | Juaphar tola | Chakia BO | 📍 841507 | Bhagwanpur Hat | Branch Post Office |
| 1210 | Jumanchapra | Laxmiganj BO | 📍 841439 | Goriakothi | Branch Post Office |
| 1211 | Junedpur | Bithuna BO | 📍 841507 | Bhagwanpur Hat | Branch Post Office |
| 1212 | Jurkan | Markan BO | 📍 841226 | Hussainganj | Branch Post Office |
| 1213 | K pali | Krishnapali BO | 📍 841234 | Darauli | Branch Post Office |
| 1214 | K T Bharauli | K.T.Bharouli BO | 📍 841404 | Daraundha | Post Office - PO |
| 1215 | Kabilpura | Sahuli BO | 📍 841286 | Hasanpura | Branch Post Office |
| 1216 | Kabirpur | Kabirpur BO | 📍 841243 | Mairwa | Branch Post Office |
| 1217 | Kabirpura | Sahuli BO | 📍 841286 | Hasanpura | Branch Post Office |
| 1218 | Kabiruddin Chak | Hasanpura SO | 📍 841236 | Hasanpura | Post Office - PO |
| 1219 | Kabita | Bargaon BO | 📍 841239 | Mairwa | Branch Post Office |
| 1220 | Kachahari road siwan | Siwan HO | 📍 841226 | Siwan | Head Post Office - H |
| 1221 | Kachnar | Kachnar BO | 📍 841210 | Siswan | Branch Post Office |
| 1222 | Kadhi | Sahuli BO | 📍 841286 | Hasanpura | Branch Post Office |
| 1223 | Kadirganj | Tethli BO | 📍 841232 | Barharia | Post Office - PO |
| 1224 | Kail | Kailgarh BO | 📍 841438 | Barharia | Branch Post Office |
| 1225 | Kaira Tal | Aghaila BO | 📍 841436 | Siwan | Branch Post Office |
| 1226 | Kaithaulia | Langarpura BO | 📍 841239 | Mairwa | Branch Post Office |
| 1227 | Kaithi | Saraya Sah Mohamd BO | 📍 841506 | Goriakothi | Branch Post Office |
| 1228 | Kaithi Utkrmit Vidyalay | Saraya Sah Mohamd BO | 📍 841506 | Goriakothi | Branch Post Office |
| 1229 | Kaji Patiyav | Nand Pur Amwari BO | 📍 841231 | Raghunathpur | Branch Post Office |
| 1230 | Kajrasan | Dighwalia BO | 📍 841203 | Raghunathpur | Branch Post Office |
| 1231 | Kakarghatti | Akolhi BO | 📍 841239 | Ziradei | Branch Post Office |
| 1232 | Kakuliyat | Raghunathpur SO Siwan | 📍 841504 | Raghunathpur | Post Office - PO |
| 1233 | Kaladumra | Kaladumra BO | 📍 841439 | Goriakothi | Branch Post Office |
| 1234 | Kaleanpur | Gaushalaroad Siwan SO | 📍 841227 | Pachrukhi | Post Office - PO |
| 1235 | Kaleanpur | Karanpura BO | 📍 841506 | Goriakothi | Branch Post Office |
| 1236 | Kaleyani | Chitakhal BO | 📍 841435 | Guthani | Branch Post Office |
| 1237 | Kali asthan | Bhikhpur Bhgwanpur BO | 📍 841236 | Siswan | Branch Post Office |
| 1238 | Kali Tola | Sughri BO | 📍 841406 | Bhagwanpur Hat | Branch Post Office |
| 1239 | Kalinjra | Jiyan BO | 📍 841226 | Siwan | Branch Post Office |
| 1240 | Kalu Chapra | Madhopur BO | 📍 841232 | Barharia | Branch Post Office |
| 1241 | Kaluchhapra | Mahmodpur BO | 📍 841232 | Barharia | Post Office - PO |
| 1242 | Kaluwari tola | Bhikha Bandh Satjora BO | 📍 841244 | Daraundha | Branch Post Office |
| 1243 | Kalyanpur | Madhopur BO | 📍 841413 | Barharia | Branch Post Office |
| 1244 | Kalyanpur | Karanpura BO | 📍 841506 | Maharajganj | Branch Post Office |
| 1245 | Kalyanpur Dhunia Tola | Karanpura BO | 📍 841506 | Goriakothi | Branch Post Office |
| 1246 | Kalyanpur Middil School | Karanpura BO | 📍 841506 | Goriakothi | Branch Post Office |
| 1247 | Kalyanpur Paschim Tola | Karanpura BO | 📍 841506 | Goriakothi | Branch Post Office |
| 1248 | Kalyanpur Purab Tola | Karanpura BO | 📍 841506 | Goriakothi | Branch Post Office |
| 1249 | Kamsara | K.T.Bharouli BO | 📍 841404 | Daraundha | Post Office - PO |
| 1250 | Kamsara | K.T.Bharauli BO | 📍 841404 | Daraundha | Post Office - PO |