| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 301 | Bhaunri | Bhawara BO | 📍 845307 | Sikta | Branch Post Office |
| 302 | Bhawal | Bhawal BO | 📍 845106 | Ramnagar | Branch Post Office |
| 303 | Bhawal | Ramnagar SO West Champaran | 📍 845106 | Ramnagar | Post Office - PO |
| 304 | Bhawanipur | Kurshi Barawa BO | 📍 845307 | Sikta | Branch Post Office |
| 305 | Bhawanipur | Bhawanipur BO | 📍 845438 | Jogapatti | Branch Post Office |
| 306 | Bhawanipur | Nawalpur BO | 📍 845452 | Jogapatti | Branch Post Office |
| 307 | Bhawanipur | Jamunia BO | 📍 845455 | Gaunaha | Branch Post Office |
| 308 | Bhawanipur Tola Majharia | Sugaha Bhawanipur BO | 📍 845307 | Sikta | Branch Post Office |
| 309 | Bhelahi | Kunai Bhelahi BO | 📍 845105 | Sidhaw | Branch Post Office |
| 310 | Bherihari | Damrapur BO | 📍 845451 | Mainatanr | Branch Post Office |
| 311 | Bheriharwa | Marjadwa BO | 📍 845306 | Mainatanr | Branch Post Office |
| 312 | Bheriharwa | Sugaha Bhawanipur BO | 📍 845307 | Sikta | Branch Post Office |
| 313 | Bheriharwa | Belwa BO | 📍 845449 | Narkatiaganj | Branch Post Office |
| 314 | Bheriharwa | Bheriharwa BO | 📍 845449 | Narkatiaganj | Branch Post Office |
| 315 | Bheriharwa | Rakhahi BO | 📍 845451 | Narkatiaganj | Branch Post Office |
| 316 | Bherihawa | Dumara BO | 📍 845453 | Lauriya | Branch Post Office |
| 317 | Bhetahiya | Patilar BO | 📍 845101 | Bagaha | Branch Post Office |
| 318 | Bhikhampur | Mushahari BO | 📍 845450 | Chanpatia | Branch Post Office |
| 319 | Bhikhana Thori | Narkaiaganj SO | 📍 845455 | Narkatiaganj | Post Office - PO |
| 320 | Bhikhnathori | Bhikhana Thori BO | 📍 845455 | Gaunaha | Branch Post Office |
| 321 | Bhinda Chaur | Tarwalia BO | 📍 845105 | Sidhaw | Branch Post Office |
| 322 | Bhirbhiri | Damrapur BO | 📍 845451 | Mainatanr | Branch Post Office |
| 323 | Bhitaha | Bhitaha BO | 📍 845104 | Bhitaha | Branch Post Office |
| 324 | Bhitaha | Madhubani SO | 📍 845104 | Thakrahan | Post Office - PO |
| 325 | Bhitaha | Cheutaha BO | 📍 845106 | Sidhaw | Branch Post Office |
| 326 | Bhitaha | Bhitaha Nizamat BO | 📍 845438 | Bhitaha | Branch Post Office |
| 327 | Bhitaha Nizamat | Bhitaha Nizamat BO | 📍 845438 | Bairia | Branch Post Office |
| 328 | Bhitharwa | Bhitiharwa Ashram BO | 📍 845455 | Gaunaha | Branch Post Office |
| 329 | Bhitharwa Ashram | Narkaiaganj SO | 📍 845455 | Narkatiaganj | Post Office - PO |
| 330 | Bhitharwa Dheri Dhenhwa | Bhitiharwa Ashram BO | 📍 845455 | Gaunaha | Branch Post Office |
| 331 | Bhuidharwa | Bhuidharwa BO | 📍 845104 | Bhitaha | Branch Post Office |
| 332 | Bhuidharwa | Madhubani SO | 📍 845104 | Thakrahan | Post Office - PO |
| 333 | Bhulbhuliya | Serwa Done BO | 📍 845106 | Ramnagar | Branch Post Office |
| 334 | Bhuski | Manwa Parsi BO | 📍 845455 | Gaunaha | Branch Post Office |
| 335 | Bibi Bankatwa | B.B. Bankatwa BO | 📍 845101 | Bagaha | Post Office - PO |
| 336 | Bigri | Sigari Bigari BO | 📍 845106 | Ramnagar | Branch Post Office |
| 337 | Bihar | Bakuli BO | 📍 845105 | Sidhaw | Branch Post Office |
| 338 | Bijaypur | Belsandi BO | 📍 845455 | Gaunaha | Branch Post Office |
| 339 | Bijbania | Bijbania BO | 📍 845453 | Lauriya | Branch Post Office |
| 340 | Bijbania | Musharwa BO | 📍 845455 | Narkatiaganj | Branch Post Office |
| 341 | Bijbania Bandobasti | Lauriya SO | 📍 845453 | Chanpatia | Post Office - PO |
| 342 | Bilaspur | Bakharia BO | 📍 845454 | Majhaulia | Branch Post Office |
| 343 | Binahi | Binahi BO | 📍 845104 | Bagaha | Branch Post Office |
| 344 | Binahi | Madhubani SO | 📍 845104 | Thakrahan | Post Office - PO |
| 345 | Bindaulia | Sidhaw BO | 📍 845105 | Bagaha | Branch Post Office |
| 346 | Bindauliya | Sidhaw BO | 📍 845105 | Sidhaw | Branch Post Office |
| 347 | Bindraban | Danial Parsauna BO | 📍 845449 | Lauriya | Branch Post Office |
| 348 | Binwalia | Mahuawa BO | 📍 845455 | Narkatiaganj | Branch Post Office |
| 349 | Biranchi | Damrapur BO | 📍 845451 | Mainatanr | Branch Post Office |
| 350 | Birit Gonahi | Briti Matiaria BO | 📍 845453 | Lauriya | Branch Post Office |