| population | |
| Araria | 2811569 |
| Arwal | |
| Aurangabad | 2540073 |
| Banka | 2034763 |
| Begusarai | 2970541 |
| Bhagalpur | 3037766 |
| Bhojpur | 2728407 |
| Buxar | 1706352 |
| Darbhanga | 3937385 |
| Gaya | 4391418 |
| Gopalganj | 2562012 |
| Jamui | 1760405 |
| Jehanabad | 1125313 |
| population | |
| Kaimur District | 1626384 |
| Katihar | 3071029 |
| Khagaria | 1666886 |
| Kishanganj | 1690400 |
| Lakhisarai | 1000912 |
| Madhepura | 2001762 |
| Madhubani | 4487379 |
| Munger | 1367765 |
| Muzaffarpur | 4801062 |
| Nalanda | 2877653 |
| Nawada | 2219146 |
| Pashchim Champaran | 3935042 |
| Patna | 5838465 |
| population | |
| Purba Champaran | 5099371 |
| Purnia | 3264619 |
| Rohtas | 2959918 |
| Saharsa | 1900661 |
| Samastipur | 4261566 |
| Saran | 3951862 |
| Sheikhpura | 636342 |
| Sheohar | 656246 |
| Sitamarhi | 3423574 |
| Siwan | 3330464 |
| Supaul | 2229076 |
| Vaishali | 3495021 |
 | Darbhanga Airport | ~ 51.99 km |
| Muzaffarpur Airport | ~ 59.90 km |
| Jay Prakash Narayan Airport | ~ 68.65 km |
 | Janakpur Airport | ~ 107.99 km |
| Rajbiraj Airport | ~ 129.58 km |
| Gaya Airport | ~ 137.69 km |
| Biratnagar Airport | ~ 171.65 km |
| Deoghar Airport | ~ 173.91 km |
| Simara Airport | ~ 174.50 km |
