Hilsa is a sub-division of the Nalanda district in the Indian state of Bihar well known as a centre of Buddhist knowledge. Located approximately 40 kilometres (25 mi) south-east of the state capital Patna, the area was an important hub during the Indian independence movement and produced many freedom fighters.
Hilsa is located at 25°19′N 85°17′E / 25.32°N 85.28°E and has an average elevation of 45 metres (148 ft).
The town is served by State Highway 4 and directly connected to places such as Patna, Gaya, Bodhgaya, Nalanda, Bihar Sharif, Rajgir and Jahanabad by road.
Hilsa is located on the branch line connecting Fatuha and Tilaiya via Islampur. The town is served by a direct daily superfast train to New Delhi (Magadh Express).