Harnaut is a Sub-District (Tehsil/Block/Mandal) in the Nalanda District of Bihar. As par Census 2011 information the sub-district code of Harnaut is 01380. There are about 20 sub-districts in Nalanda and Harnaut is one of them. Asthawan, Ben, Bihar, Bind, Chandi, Ekangarsarai, Giriak, Hilsa, Islampur, Karai Parsurai, Katrisarai, Nagar Nausa, Noorsarai, Parbalpur, Rahui, Rajgir, Sarmera, Silao, Tharthari etc. are other sub-districts in Nalanda.There are about 80 villages in Harnaut sub-district, which you can browse from villages list.