Tharthari is a Sub-District (Tehsil/Block/Mandal) in the Nalanda District of Bihar. As par Census 2011 information the sub-district code of Tharthari is 01388. There are about 20 sub-districts in Nalanda and Tharthari is one of them. Asthawan, Ben, Bihar, Bind, Chandi, Ekangarsarai, Giriak, Harnaut, Hilsa, Islampur, Karai Parsurai, Katrisarai, Nagar Nausa, Noorsarai, Parbalpur, Rahui, Rajgir, Sarmera, Silao etc. are other sub-districts in Nalanda.There are about 29 villages in Tharthari sub-district, which you can browse from villages list.