| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1301 | Kamdarganj | Dharahara BO | 📍 803111 | Silao | Branch Post Office |
| 1302 | Kamruddinganj | Biharsharif HO | 📍 803101 | Bihar | Head Post Office - H |
| 1303 | Kamta | Kamta BO | 📍 801302 | Hilsa | Branch Post Office |
| 1304 | Kanak Bigha | Chhariari Bujurg BO | 📍 801307 | Tharthari | Branch Post Office |
| 1305 | Kanchan Pur | Kapsima BO | 📍 801302 | Hilsa | Branch Post Office |
| 1306 | Kanchan Pur | Meyar BO | 📍 803116 | Rajgir | Branch Post Office |
| 1307 | Kanchanpur | Mahanandpur BO | 📍 803216 | Bihar | Branch Post Office |
| 1308 | Kandopur | Adampur BO | 📍 803109 | Giriak | Branch Post Office |
| 1309 | Kandua Bigha | Karjara BO | 📍 803117 | Ben | Branch Post Office |
| 1310 | Kanhaiya Ganj | Rukhai BO | 📍 803108 | Chandi | Branch Post Office |
| 1311 | Kanhaiya Gnaj 1 | Kanhaiya Ganj BO | 📍 801306 | Ekangarsarai | Branch Post Office |
| 1312 | Kanhaiya Gnaj 2 | Ope BO | 📍 801301 | Ekangarsarai | Branch Post Office |
| 1313 | Kanhaiyaganj | Kanhaiya Ganj BO | 📍 801306 | Ekangarsarai | Branch Post Office |
| 1314 | Kanhupipar | Kachcharia BO | 📍 801307 | Tharthari | Branch Post Office |
| 1315 | Kanjash | Khojpura BO | 📍 801306 | Ekangarsarai | Branch Post Office |
| 1316 | Kanjash Balapar | Khojpura BO | 📍 801306 | Ekangarsarai | Branch Post Office |
| 1317 | Kanjhiyawan | Bansdih BO | 📍 801307 | Tharthari | Branch Post Office |
| 1318 | Kanku bigha | Eksara BO | 📍 803114 | Ben | Branch Post Office |
| 1319 | Kaparsari | Machhalduhe BO | 📍 803111 | Noorsarai | Branch Post Office |
| 1320 | Kapasia | Molanachak BO | 📍 803116 | Rajgir | Branch Post Office |
| 1321 | Kapasiawan | Kapsima BO | 📍 801302 | Hilsa | Branch Post Office |
| 1322 | Kara Bazar | Karah BO | 📍 803117 | Silao | Branch Post Office |
| 1323 | Kara dih | Karah BO | 📍 803117 | Silao | Branch Post Office |
| 1324 | Karah | Karah BO | 📍 803117 | Silao | Branch Post Office |
| 1325 | Karah BO | Karah BO | 📍 803117 | Silao | Branch Post Office |
| 1326 | Karai | Karaipersurai SO | 📍 801304 | Karai Parsurai | Post Office - PO |
| 1327 | Karai Parsurai | Karaipersurai SO | 📍 801304 | Karai Parsurai | Post Office - PO |
| 1328 | Karan bigha | Ajanaura BO | 📍 803114 | Noorsarai | Branch Post Office |
| 1329 | Karan bigha | Shankardih BO | 📍 803114 | Parbalpur | Branch Post Office |
| 1330 | Karan Ganj | Durgawan BO | 📍 801301 | Ekangarsarai | Branch Post Office |
| 1331 | Karangapur | Sarbahadi BO | 📍 803107 | Bihar | Branch Post Office |
| 1332 | Karianna | Silao SO | 📍 803117 | Silao | Post Office - PO |
| 1333 | Karimpur | Goror BO | 📍 803116 | Rajgir | Branch Post Office |
| 1334 | Karingapur | Itaura BO | 📍 803107 | Bihar | Branch Post Office |
| 1335 | Kariyana | Ranipur BO | 📍 801301 | Ekangarsarai | Branch Post Office |
| 1336 | Kariyana | Ghostawan BO | 📍 803117 | Silao | Branch Post Office |
| 1337 | Kariyawan | Bhathar SO | 📍 801307 | Tharthari | Post Office - PO |
| 1338 | Karjara | Bara BO | 📍 803117 | Ben | Branch Post Office |
| 1339 | Karjara B O | Karjara BO | 📍 803117 | Ben | Branch Post Office |
| 1340 | Karjara BO | Karjara BO | 📍 803117 | Ben | Branch Post Office |
| 1341 | Karkarain | Jana BO | 📍 803107 | Asthawan | Branch Post Office |
| 1342 | Karol Nagar | Kapsima BO | 📍 801302 | Hilsa | Branch Post Office |
| 1343 | Karu bigha | Rasalpur BO | 📍 803114 | Noorsarai | Branch Post Office |
| 1344 | Karu Bigha B O | Karubigha BO | 📍 803116 | Rajgir | Branch Post Office |
| 1345 | Karu Bigha B O 1 | Karubigha BO | 📍 803116 | Rajgir | Branch Post Office |
| 1346 | Kashamiri Chak | Khorampur BO | 📍 801303 | Islampur | Branch Post Office |
| 1347 | Kasho Chak | Muraura BO | 📍 803216 | Bihar | Branch Post Office |
| 1348 | Kasim Chak | Mahanandpur BO | 📍 803216 | Bihar | Branch Post Office |
| 1349 | Kasimpur | Dariyapur BO | 📍 801303 | Islampur | Branch Post Office |
| 1350 | Kasiyama | Khodaganj BO | 📍 801303 | Ekangarsarai | Branch Post Office |