Dhanbad is a city in the Indian state of Jharkhand. It is the second most populated city in Jharkhand. Dhanbad along with its urban areas population ranks 42nd in population amongst other cities in India.
Dhanbad has some of the largest coal mines in India and is called Coal Capital of India. Tata Steel, Bharat Coking Coal Limited (BCCL), Eastern Coalfields Limited (ECL) and Indian Iron And Steel Company (IISCO) are some of the companies who operate coal mines in the district. The engineering institute IIT (ISM), Dhanbad is located in Dhanbad.
Dhanbad district was constituted in 1956 by carving out the old Dhanbad subdivision, Chas and Chandankiyari police stations of the Sadar subdivision of the erstwhile Manbhum district. Dhanbad is Police district since 1928. The re-organisation of the districts in the State of Bihar which took place after 1971 did not affect the district of Dhanbad. In 1991 a part of Dhanbad district was sliced away to form Bokaro district.