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