Dum Dum is a city and a municipality in North 24 Parganas district in the state of West Bengal, India. It is a neighbourhood in North-west Kolkata and the location of Netaji Subhash Chandra Bose International Airport, formerly Dum Dum Airport. Dum Dum is a well known place in greater Kolkata. Dum Dum provides a number of transport facilities in the city. It has developed into a modern commercial centre in the outskirts of Kolkata. Dum Dum region is important as it constitutes main entry points of the city. With its domestic and international airport, it is the landing base for visitors to the city. The township falls in the northern region of Kolkata city.
Dum Dum region is about 10 km from the City Centre which is taken to be Esplanade, Kolkata. The nearby localities include Nager Bazar, Motijheel, Ghughu Danga, Jawpur, Rajbari and Lal Bagan. During the 19th century the area was home to a British Royal Artillery armoury, where, in the early 1890s, Captain Bertie Clay developed a bullet with the jacket cut away at the tip to reveal its soft lead core (see hollow point bullet), known as a dum-dum, or more correctly expanding bullet.