High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Rohtas district is one of the thirty-seven districts of Bihar state, India. Headquarters: Sasaram Area: 3850 km² Population: 2,448,762 (2001 census) Sub Divisions: Sasaram, Dehri, Bikramganj Blocks: Nauhatta, Chenari, Nasriganj, Rohtas, Shivsagar, Dawath, Karakat, Nokha., Vikramganj, Kargahar, Sasaram, Dihri, Dinara, Kochas, Akorhigola, Rajpur, Tilauthu, Suryapura, Sanjhauli. Agriculture: Paddy, Wheat, Lentils Industry: Cement Rivers: Son, Kaw. The Rohtas district is a part of Patna Division, and it has an area of 3850 km² (square kilometres), a population of 2,448,762 (2001 census), and a population density of 636 persons per km². The language spoken in this area is Bhojpuri.