Banmankhi is a Sub-District (Tehsil/Block/Mandal) in the Purnia District of Bihar. As par Census 2011 information the sub-district code of Banmankhi is 01128. There are about 14 sub-districts in Purnia and Banmankhi is one of them. Amour, Baisa, Baisi, Barhara, Bhawanipur, Dagarua, Dhamdaha, Jalalgarh, Kasba, Krityanand Nagar, Purnia East, Rupauli, Srinagar etc. are other sub-districts in Purnia.There are about 79 villages in Banmankhi sub-district, which you can browse from villages list.