BIADA was constituted under the statutory provisions of the Bihar Industrial Area Development Act, 1974 to provide for planned development of Industrial Areas, promotion of industries and matters appurtenant thereto. There are 52 Industrial Areas (IA) / Industrial Estates (IE) / Large Industrial Estates (LIE) / Growth Centres (GC) / Mega Industrial Parks (MIP) under the aegis of 4 Regional Offices spread in 30 Districts which are as follows :
- Patna – IA/IE Patliputra, IA Fatuha, IA Biharsharif, IA Nawada, IA Gaya, IA Jehanabad, IA Aurangabad, GC Aurangabad, IA Dehri-on-Sone, IA Barun, IA Bikramganj, IA Buxar, IA Bihiya, GC Giddha, IA Bihta, MIP Bihta, IA Barauni, IA Kopakalan, IA Sikanderpur.
- Bhagalpur – LIE Barari, IA Jamalpur, IA Munger, IA Sitakund, IA Lakhisarai, GC Kahalgaon, GC Maranga, IE Purnea City, IE Forbesganj, IE Katihar, IE Khagara (Kishanganj), IE Bhediadangi.
- Muzaffarpur – IA Sitamarhi, IA Siwan, IA/IE Muzaffarpur, IA Bettiah, IA Kumarbagh, IA Ramnagar, IA Raxaul,IA Hajipur, EPIP Hajipur.
- Darbhanga – IE Bela, IE Dharampur, IA Donar, IA Pandaul, IE Jhanjharpur, IE Samastipur, GC Khagariya, IE Saharsa, IE Murliganj, MGC Udakishanganj.