Bihar is divided into 38 districts, each with its own administrative headquarters. Here's an alphabetical list of all the districts in Bihar:
- Araria - Headquarters: Araria
- Arwal - Headquarters: Arwal
- Aurangabad - Headquarters: Aurangabad
- Banka - Headquarters: Banka
- Begusarai - Headquarters: Begusarai
- Bhagalpur - Headquarters: Bhagalpur
- Bhojpur - Headquarters: Arrah
- Buxar - Headquarters: Buxar
- Darbhanga - Headquarters: Darbhanga
- East Champaran (Purvi Champaran) - Headquarters: Motihari
- Gaya - Headquarters: Gaya
- Gopalganj - Headquarters: Gopalganj
- Jamui - Headquarters: Jamui
- Jehanabad - Headquarters: Jehanabad
- Kaimur (Bhabua) - Headquarters: Bhabua
- Katihar - Headquarters: Katihar
- Khagaria - Headquarters: Khagaria
- Kishanganj - Headquarters: Kishanganj
- Lakhisarai - Headquarters: Lakhisarai
- Madhepura - Headquarters: Madhepura
- Madhubani - Headquarters: Madhubani
- Munger (Monghyr) - Headquarters: Munger
- Muzaffarpur - Headquarters: Muzaffarpur
- Nalanda - Headquarters: Bihar Sharif
- Nawada - Headquarters: Nawada
- Patna - Headquarters: Patna
- Purnia - Headquarters: Purnia
- Rohtas - Headquarters: Sasaram
- Saharsa - Headquarters: Saharsa
- Samastipur - Headquarters: Samastipur
- Saran - Headquarters: Chhapra
- Sheikhpura - Headquarters: Sheikhpura
- Sheohar - Headquarters: Sheohar
- Sitamarhi - Headquarters: Sitamarhi
- Siwan - Headquarters: Siwan
- Supaul - Headquarters: Supaul
- Vaishali - Headquarters: Hajipur
- West Champaran (Paschim Champaran) - Headquarters: Bettiah
Each district in Bihar has its own unique cultural, linguistic, and economic characteristics, contributing to the diverse fabric of the state. These districts serve as administrative units for governance, development, and the implementation of state policies.