| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 201 | Jaruwadih | Madhopur BO | 📍 811303 | Chakai | Branch Post Office |
| 202 | Jekhra | Kaiyar BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 203 | Jhajha | Jhajha Bazar SO | 📍 811308 | Jhajha | Post Office - PO |
| 204 | Jhajha | Simultala SO | 📍 811316 | Jhajha | Post Office - PO |
| 205 | Jhanjhri | Abgil Chaurama BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 206 | Jhundo | Dhundo BO | 📍 811314 | Sono | Branch Post Office |
| 207 | Jimatpur | Chakai SO | 📍 811303 | Chakai | Post Office - PO |
| 208 | Jimatpur | N. Silfari BO | 📍 811303 | Chakai | Branch Post Office |
| 209 | Jimatpur Arazi | N. Silfari BO | 📍 811303 | Chakai | Branch Post Office |
| 210 | Jinhara | Kala BO | 📍 811312 | Lakshmipur | Branch Post Office |
| 211 | Jitjhingoi | Jit Jhingoibo BO | 📍 811317 | Khaira | Branch Post Office |
| 212 | Jogajhingoal | Jit Jhingoibo BO | 📍 811317 | Khaira | Branch Post Office |
| 213 | Jorbaha Dharampur | Chanashly BO | 📍 811317 | Khaira | Branch Post Office |
| 214 | Kagesar | Chuwan BO | 📍 811305 | Khaira | Branch Post Office |
| 215 | Kaiar | Kaiyar BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 216 | Kaitha | Seway BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 217 | Kaithwara | Karma BO | 📍 811315 | Sikandra | Branch Post Office |
| 218 | Kakan | Kakan BO | 📍 811313 | Jamui | Branch Post Office |
| 219 | Kakanchaur | Dighi BO | 📍 811312 | Lakshmipur | Branch Post Office |
| 220 | Kala | Kala BO | 📍 811312 | Lakshmipur | Branch Post Office |
| 221 | Kanhaipharka | Sono SO | 📍 811314 | Sono | Post Office - PO |
| 222 | Karan Nawada | Khaira SO Jamui | 📍 811317 | Khaira | Post Office - PO |
| 223 | Karanpur | Kala BO | 📍 811312 | Lakshmipur | Branch Post Office |
| 224 | Karitanr | Khelari BO | 📍 811317 | Khaira | Branch Post Office |
| 225 | Karma | Karma BO | 📍 811315 | Sikandra | Branch Post Office |
| 226 | Kasbagidhaur | Gopalpur BO | 📍 811317 | Khaira | Branch Post Office |
| 227 | Kashmir | Khaira SO Jamui | 📍 811317 | Khaira | Post Office - PO |
| 228 | Katauna | Katauna BO | 📍 811313 | Barhat | Branch Post Office |
| 229 | Kendih | Khaira SO Jamui | 📍 811317 | Khaira | Post Office - PO |
| 230 | Kendua | Tihiya BO | 📍 811305 | Khaira | Branch Post Office |
| 231 | Kenuhat | Matia BO | 📍 811312 | Lakshmipur | Branch Post Office |
| 232 | Kenui | Patambar BO | 📍 811315 | Sikandra | Branch Post Office |
| 233 | Kerakado | Mango Bandar BO | 📍 811305 | Khaira | Branch Post Office |
| 234 | Keshopharka | Sono SO | 📍 811314 | Sono | Post Office - PO |
| 235 | Keshopur | Keshopur BO | 📍 811305 | Jhajha | Branch Post Office |
| 236 | Ketru Nawada | Gidhaur SO | 📍 811305 | Gidhaur | Post Office - PO |
| 237 | Khaira | Khaira BO | 📍 811213 | Khaira | Branch Post Office |
| 238 | Khaira | Khaira SO Jamui | 📍 811317 | Khaira | Post Office - PO |
| 239 | Khairi | Dinnagar BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 240 | Khairi | Amrath BO | 📍 811313 | Jamui | Branch Post Office |
| 241 | Khajura | Kaiyar BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 242 | Khalari | Khelari BO | 📍 811317 | Khaira | Branch Post Office |
| 243 | Khandaich | Kharaich BO | 📍 811317 | Khaira | Branch Post Office |
| 244 | Kharagpur | Abgil Chaurama BO | 📍 811301 | Islamnagar Aliganj | Branch Post Office |
| 245 | Khardih | Khardih BO | 📍 811315 | Sikandra | Branch Post Office |
| 246 | Khargpur | Kakan BO | 📍 811313 | Jamui | Branch Post Office |
| 247 | Kharhaia Urf Jamu | Jhajha SO | 📍 811308 | Jhajha | Post Office - PO |
| 248 | Kharhua | Kharhawa BO | 📍 811305 | Gidhaur | Branch Post Office |
| 249 | Kharsari | Kharsari BO | 📍 811313 | Jamui | Branch Post Office |
| 250 | Kharui | Dumarkola BO | 📍 811317 | Khaira | Branch Post Office |