Islampur is a Sub-District (Tehsil/Block/Mandal) in the Nalanda District of Bihar. As par Census 2011 information the sub-district code of Islampur is 01392. There are about 20 sub-districts in Nalanda and Islampur is one of them. Asthawan, Ben, Bihar, Bind, Chandi, Ekangarsarai, Giriak, Harnaut, Hilsa, Karai Parsurai, Katrisarai, Nagar Nausa, Noorsarai, Parbalpur, Rahui, Rajgir, Sarmera, Silao, Tharthari etc. are other sub-districts in Nalanda.There are about 89 villages in Islampur sub-district, which you can browse from villages list.