The Sub-Division is divided into Blocks. Nalanda District Consists of 20 Blocks. Block is headed by Block Development Officer.
Blocks: 20 – Giriyak, Rahui, Ajaypur Noorsarai, Harnaut, Chandi (Nalanda), Islampur (Nalanda), Rajgir, Asthawan, Sarmera, Hilsa, Biharsharif, Ekangarsarai, Bena, Nagarnausa, Karai Parsarai, Silao, Parwalpur, Katrisarai, Bind, Tharthari