IDBI Bank is in Follwing Districts in Bihar State

Araria
Arwal
Aurangabad
Banka
Begusarai
Bhagalpur
Bhojpur
Buxar
Darbhanga
Euaa
Gaya
Gopalganj
Jamui
Jehanabad
Kaimur
Katihar
Khagaria
Kishanganj
Lakhisarai
Madhepura
Madhubani
Munger
Muzaffarpur
Nalanda
Nawada
Opp. Suri School
Paschimi Champaran
Patna
Purbi Champaran
Purnia
Rohtas
Saharsa
Samastipur
Saran
Sheikhpura
Sheohar
Sitamarhi
Siwan
Supaul
Vaishali