| #SL | District Name | No. Of Postoffice |
|---|---|---|
| 1. | Araria | 154 |
| 2. | Arwal | 13 |
| 3. | Aurangabad(BH) | 278 |
| 4. | Banka | 199 |
| 5. | Begusarai | 237 |
| 6. | Bhagalpur | 267 |
| 7. | Bhojpur | 300 |
| 8. | Buxar | 195 |
| 9. | Darbhanga | 376 |
| 10. | East Champaran | 424 |
| 11. | Gaya | 414 |
| 12. | Gopalganj | 215 |
| 13. | Jamui | 149 |
| 14. | Jehanabad | 134 |
| 15. | Kaimur (Bhabua) | 132 |
| 16. | Katihar | 183 |
| 17. | Khagaria | 149 |
| 18. | Kishanganj | 90 |
| 19. | Lakhisarai | 89 |
| 20. | Madhepura | 203 |