| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1101 | Kasigawan | Banjari SO | 📍 821303 | Rohtas | Post Office - PO |
| 1102 | Kaskudar | Parariya BO | 📍 821304 | Rohtas | Branch Post Office |
| 1103 | Kastar | K. Mahdeo BO | 📍 802212 | Bikramganj | Post Office - PO |
| 1104 | Kastar Mahadev | K. Mahdeo BO | 📍 802212 | Bikramganj | Post Office - PO |
| 1105 | Katal pur | Bahuara BO | 📍 802216 | Dawath | Branch Post Office |
| 1106 | Katar | Indrapuri SO | 📍 821308 | Dehri | Post Office - PO |
| 1107 | Katar Tola | Manikpur Bastipur BO | 📍 821305 | Dehri | Branch Post Office |
| 1108 | Katdehri | Gotpa BO | 📍 821113 | Sasaram | Branch Post Office |
| 1109 | Katdehri | Sasaram HO | 📍 821115 | Sasaram | Head Post Office - H |
| 1110 | Kath Khaulia | Marojhian BO | 📍 821310 | Nasriganj | Branch Post Office |
| 1111 | Katharain | Kudra SO | 📍 821108 | Kochas | Post Office - PO |
| 1112 | Kathua | Khanaithi BO | 📍 821107 | Kargahar | Branch Post Office |
| 1113 | Katra | Chenari SO | 📍 821104 | Chenari | Post Office - PO |
| 1114 | Katudanr | Tilokhar BO | 📍 821304 | Nauhatta | Branch Post Office |
| 1115 | Kauakhonch | Ghordiha BO | 📍 821107 | Kargahar | Branch Post Office |
| 1116 | Kauja | Baraon Kala BO | 📍 821306 | Dehri | Branch Post Office |
| 1117 | Kauni | Karmaini BO | 📍 802220 | Dinara | Branch Post Office |
| 1118 | Kaupa | Nad BO | 📍 821113 | Sasaram | Branch Post Office |
| 1119 | Kaupa Dih | Sasaram HO | 📍 821115 | Sasaram | Head Post Office - H |
| 1120 | Kauwakhonch | Jamroh BO | 📍 802213 | Dinara | Branch Post Office |
| 1121 | Kawai | Semri BO | 📍 802211 | Dawath | Branch Post Office |
| 1122 | Kawai | Imirtha BO | 📍 802221 | Suryapura | Branch Post Office |
| 1123 | Kazipur | Daranagar BO | 📍 821304 | Nauhatta | Branch Post Office |
| 1124 | Kedarganj | Sikthi BO | 📍 802213 | Dinara | Branch Post Office |
| 1125 | Kekarha | Torni BO | 📍 821111 | Sheosagar | Branch Post Office |
| 1126 | Kenar Kalan | Chandarkaihti BO | 📍 821104 | Chenari | Branch Post Office |
| 1127 | Kenar Khurd | Sikrour BO | 📍 821104 | Chenari | Branch Post Office |
| 1128 | Kerpa | Ramdihra BO | 📍 821312 | Tilouthu | Branch Post Office |
| 1129 | Kesho Bigha | Gamhariya BO | 📍 821301 | Akorhi Gola | Branch Post Office |
| 1130 | Keshopur | Torni Lahera BO | 📍 821108 | Sheosagar | Branch Post Office |
| 1131 | Kewatiya | Koath SO | 📍 802216 | Dawath | Post Office - PO |
| 1132 | Kewtadhi | Nad BO | 📍 821113 | Sasaram | Branch Post Office |
| 1133 | Khadauli | Chenari SO | 📍 821104 | Chenari | Post Office - PO |
| 1134 | Khadaw | Khudru BO | 📍 821112 | Kochas | Branch Post Office |
| 1135 | Khadawan | Khudru BO | 📍 821112 | Kochas | Branch Post Office |
| 1136 | Khadra | A. Kala BO | 📍 802226 | Suryapura | Post Office - PO |
| 1137 | Khagadia Patti | Takia Bazar SO | 📍 821113 | Sasaram | Post Office - PO |
| 1138 | Khaira | Dumari BO | 📍 821104 | Chenari | Branch Post Office |
| 1139 | Khaira | Deokhaira BO | 📍 821107 | Kargahar | Branch Post Office |
| 1140 | Khaira | Kochas SO | 📍 821112 | Kochas | Post Office - PO |
| 1141 | Khaira | Nad BO | 📍 821113 | Sasaram | Branch Post Office |
| 1142 | Khaira Bhunder | Natwar SO | 📍 802218 | Dinara | Post Office - PO |
| 1143 | Khaira Dew | Khaira BO | 📍 821101 | Kargahar | Branch Post Office |
| 1144 | Khaira Sahmal | Balthari BO | 📍 821107 | Kargahar | Branch Post Office |
| 1145 | Khairaha | Khairhan BO | 📍 821305 | Dehri | Branch Post Office |
| 1146 | Khairahi | Garh Nokha SO | 📍 802215 | Kargahar | Post Office - PO |
| 1147 | Khairahi | Bahuara BO | 📍 802216 | Dawath | Branch Post Office |
| 1148 | Khairahi Kala | Basadihan BO | 📍 802213 | Dinara | Branch Post Office |
| 1149 | Khairahi Khurd | Basadihan BO | 📍 802213 | Dinara | Branch Post Office |
| 1150 | Khairahin | Barhari BO | 📍 802215 | Nokha | Branch Post Office |