Dalmianagar is one of the oldest and biggest industrial town in India. It boasts a vast and beautiful housing colony including schools, market complexes, hospital, gardens, clubs etc. The Industrial town of Dalmianagar was founded by the famous industrialist Ramkrishna Dalmia, doyens of business in 20th century India and founder of the Dalmia Group.

He was assisted by his younger brother Jaidayal Dalmia and son in law Sahu Shanti Prasad Jain in establishing many factories of Rohtas Industries Ltd. in Dalmianagar. Shanti Prasad Jain took over Rohtas Industries Ltd. from his father-in-law, and under his stewardship, Dalmianagar developed into a massive industrial town from the 1940s till the 1980s with factories producing sugar, cement, paper, chemicals, vanaspati, etc. employing top professionals of the country.


  • Date of Declaration of District: 10th November 1972
  • Latitude: 24-30” to 25-20” (North)
  • Longitude: 83-14” to 83-20” (East)
  • Height from Sea Level: 107.78 Meters
  • Boundaries
  • North: Bhojpur & Buxar Districts
  • South: Plamu & Garwah Districts
  • EAST: Aurangabad & Part of Gaya District
  • WEST: Kaimur District
  • Area: 3,847.82 Sq Km
  • Total Population: 29,62,593
  • Male: 15,47,856
  • Female: 14,14,737
  • Sex Ratio: 914 females per 1000 males
  • No. of Subdivisions: 3
  • No. of Blocks: 19
  • No. of Revenue Circles: 19
  • No. of Municipalities: 7
  • Literacy Rate : 75.59%
  • No. of Gram Panchayats: 245
  • No. of Villages: 2072

Dalmianagar is one of the oldest and biggest industrial towns in India. This is a city and a Municipality in Rohtas district in the state of Bihar, India, combinedly known as Dehri-Dalmianagar Nagar Palika.

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