| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1351 | Kasturi Bigha | Barahgawan BO | 📍 801303 | Islampur | Branch Post Office |
| 1352 | Katahari | Mafi BO | 📍 803107 | Asthawan | Branch Post Office |
| 1353 | Katahari Bigha | Bangpur BO | 📍 803114 | Parbalpur | Branch Post Office |
| 1354 | Katardih | Bhagwanpur BO | 📍 805105 | Katrisarai | Branch Post Office |
| 1355 | Katari | Goror BO | 📍 803116 | Rajgir | Branch Post Office |
| 1356 | Katarpur | Bilari BO | 📍 805130 | Katrisarai | Branch Post Office |
| 1357 | Katauli | Rustampur BO | 📍 801303 | Islampur | Branch Post Office |
| 1358 | Katauli Math | Murgawan BO | 📍 801303 | Islampur | Branch Post Office |
| 1359 | Katauna Part in Giriak | Katauna BO | 📍 805130 | Katrisarai | Branch Post Office |
| 1360 | Katauna Part in Katrisarai | Katrisarai SO | 📍 805105 | Giriak | Post Office - PO |
| 1361 | Katha | Nahub BO | 📍 803116 | Rajgir | Branch Post Office |
| 1362 | Kathanpura Bazar | Ajaypur BO | 📍 803120 | Noorsarai | Branch Post Office |
| 1363 | Kathanpura Dih | Ajaypur BO | 📍 803120 | Noorsarai | Branch Post Office |
| 1364 | Kathar Par | Naima BO | 📍 801306 | Ekangarsarai | Branch Post Office |
| 1365 | Kathauli | Mai Farida BO | 📍 803119 | Rahui | Branch Post Office |
| 1366 | Kathauli B O | Kathauli BO | 📍 803113 | Noorsarai | Branch Post Office |
| 1367 | Kathrahi | Kathrahi BO | 📍 803107 | Bind | Branch Post Office |
| 1368 | Katraper | Biharsharif HO | 📍 803101 | Bihar | Head Post Office - H |
| 1369 | Katri | Katrisarai SO | 📍 805105 | Katrisarai | Post Office - PO |
| 1370 | Katrisarai | Katrisarai SO | 📍 805105 | Katrisarai | Post Office - PO |
| 1371 | Katru Bigha | Besai Bigha BO | 📍 801301 | Ekangarsarai | Branch Post Office |
| 1372 | Katwa Rasalpur | Arjunsarthuya BO | 📍 801303 | Islampur | Branch Post Office |
| 1373 | Kaushalpur | Daily BO | 📍 803110 | Harnaut | Branch Post Office |
| 1374 | Kaushalpur | Poari BO | 📍 803110 | Harnaut | Branch Post Office |
| 1375 | Kawa | Kawa BO | 📍 801302 | Hilsa | Branch Post Office |
| 1376 | Kawai | Jaitpur BO | 📍 801307 | Tharthari | Branch Post Office |
| 1377 | Kayampur | Tetrawan BO | 📍 803216 | Bihar | Branch Post Office |
| 1378 | Kazi Bigha | Rasisa BO | 📍 801303 | Ekangarsarai | Branch Post Office |
| 1379 | Kazi Chak | Ichhos BO | 📍 801303 | Islampur | Branch Post Office |
| 1380 | Kazi Chak | Narayanpur BO | 📍 801306 | Ekangarsarai | Branch Post Office |
| 1381 | Kazi Chak | Singhaul BO | 📍 811102 | Sarmera | Branch Post Office |
| 1382 | Kazichak | Surhari BO | 📍 803202 | Harnaut | Branch Post Office |
| 1383 | Kazina | Islampur SO Nalanda | 📍 801303 | Islampur | Post Office - PO |
| 1384 | Kedu Bigha | Rasisa BO | 📍 801303 | Ekangarsarai | Branch Post Office |
| 1385 | Kela Bagh | Telhara SO Nalanda | 📍 801306 | Ekangarsarai | Post Office - PO |
| 1386 | Kenar | Kenar Kalan BO | 📍 811101 | Sarmera | Branch Post Office |
| 1387 | Kesho Pur | Telhara SO Nalanda | 📍 801306 | Ekangarsarai | Post Office - PO |
| 1388 | Keshochak | Chiksoura BO | 📍 801302 | Hilsa | Branch Post Office |
| 1389 | Keshopur | Keshopur BO | 📍 801302 | Ekangarsarai | Branch Post Office |
| 1390 | Kewai | Dhobdiha BO | 📍 801303 | Islampur | Branch Post Office |
| 1391 | Kewai | Nagarnausa SO | 📍 801305 | Nagar Nausa | Post Office - PO |
| 1392 | Kewai | Dahpar Sargaon BO | 📍 803114 | Noorsarai | Branch Post Office |
| 1393 | Kewai dih | Dahpar Sargaon BO | 📍 803114 | Noorsarai | Branch Post Office |
| 1394 | Kewal bigha | Paroha BO | 📍 803107 | Bihar | Branch Post Office |
| 1395 | Kewali | Kochra BO | 📍 801303 | Islampur | Branch Post Office |
| 1396 | Kganj Colony | Kanhaiya Ganj BO | 📍 801306 | Ekangarsarai | Branch Post Office |
| 1397 | Khaddi | Khaddi Lodipur BO | 📍 801301 | Hilsa | Branch Post Office |
| 1398 | Khaddilodipur | Khaddi Lodipur BO | 📍 801301 | Ekangarsarai | Branch Post Office |
| 1399 | Khadi Gram Udhog | Islampur SO Nalanda | 📍 801303 | Islampur | Post Office - PO |
| 1400 | Khagniya Bigha | Khodaganj BO | 📍 801303 | Ekangarsarai | Branch Post Office |