Baisa is a Sub-District (Tehsil/Block/Mandal) in the Purnia District of Bihar. As par Census 2011 information the sub-district code of Baisa is 01139. There are about 14 sub-districts in Purnia and Baisa is one of them. Amour, Baisi, Banmankhi, Barhara, Bhawanipur, Dagarua, Dhamdaha, Jalalgarh, Kasba, Krityanand Nagar, Purnia East, Rupauli, Srinagar etc. are other sub-districts in Purnia.There are about 130 villages in Baisa sub-district, which you can browse from villages list.