Bihar is a Sub-District (Tehsil/Block/Mandal) in the Nalanda District of Bihar. As par Census 2011 information the sub-district code of Bihar is 01386. There are about 20 sub-districts in Nalanda and Bihar is one of them. Asthawan, Ben, Bind, Chandi, Ekangarsarai, Giriak, Harnaut, Hilsa, Islampur, Karai Parsurai, Katrisarai, Nagar Nausa, Noorsarai, Parbalpur, Rahui, Rajgir, Sarmera, Silao, Tharthari etc. are other sub-districts in Nalanda.There are about 75 villages in Bihar sub-district, which you can browse from villages list.