You will get information about the names of all the districts of Bihar, their head quarters, their area and how much population there is on our page. From here you can see the names of all the districts of Bihar as well as their area and population or It is very important to know if you are a resident of Bihar or a resident of India.
| Sr. No. | Name of District | Name of Head Quarters | Area (sq km) | Population |
| 1 | Araria | Araria | 2,829 | 2,811,569 |
| 2 | Arwal | Arwal | 637 | 699,000 |
| 3 | Aurangabad | Aurangabad | 3,303 | 2,540,073 |
| 4 | Banka | Banka | 3,018 | 2,034,763 |
| 5 | Begusarai | Begusarai | 1,917 | 2,970,541 |
| 6 | Bhagalpur | Bhagalpur | 2,569 | 3,037,766 |
| 7 | Bhojpur | Arrah | 2,473 | 2,728,407 |
| 8 | Buxar | Buxar | 1,624 | 1,706,352 |
| 9 | Darbhanga | Darbhanga | 2,278 | 3,937,385 |
| 10 | East Champaran | Motihari | 3,969 | 5,099,371 |
| 11 | Gaya | Gaya | 4,978 | 4,391,418 |
| 12 | Gopalganj | Gopalganj | 2,033 | 2,562,012 |
| 13 | Jamui | Jamui | 3,099 | 1,760,405 |
| 14 | Jehanabad | Jehanabad | 1,569 | 1,125,313 |
| 15 | Khagaria | Khagaria | 1,486 | 1,666,886 |
| 16 | Kishanganj | Kishanganj | 1,884 | 1,690,400 |
| 17 | Kaimur | Bhabua | 3,363 | 1,626,384 |
| 18 | Katihar | Katihar | 3,056 | 3,071,029 |
| 19 | Lakhisarai | Lakhisarai | 1,229 | 1,000,912 |
| 20 | Madhubani | Madhubani | 3,501 | 4,487,379 |
| 21 | Munger | Munger | 1,419 | 1,367,765 |
| 22 | Madhepura | Madhepura | 1,787 | 2,001,762 |
| 23 | Muzaffarpur | Muzaffarpur | 3,173 | 4,801,062 |
| 24 | Nalanda | Bihar Sharif | 2,354 | 2,877,653 |
| 25 | Nawada | Nawada | 2,492 | 2,219,146 |
| 26 | Patna | Patna | 3,202 | 5,838,465 |
| 27 | Purnia | Purnia | 3,228 | 3,264,619 |
| 28 | Rohtas | Sasaram | 3,850 | 2,959,918 |
| 29 | Saharsa | Saharsa | 1,702 | 1,900,661 |
| 30 | Samastipur | Samastipur | 2,905 | 4,261,566 |
| 31 | Sheohar | Sheohar | 443 | 656,916 |
| 32 | Sheikhpura | Sheikhpura | 689 | 634,927 |
| 33 | Saran | Chhapra | 2,641 | 3,951,862 |
| 34 | Sitamarhi | Dumra,Sitamarhi | 2,199 | 3,423,574 |
| 35 | Supaul | Supaul | 2,410 | 2,229,076 |
| 36 | Siwan | Siwan | 2,219 | 3,330,464 |
| 37 | Vaishali | Hajipur | 2,036 | 3,495,021 |
| 38 | West Champaran | Bettiah | 5,229 | 3,935,042 |
