Large area with a noticeable concentration of several industrial centres is known as industrial region. In India, several industrial centres have been established during the past two decades. The industrial centres of India are located far away from each other. They can be found along some prominent railway routes. In some places, there are chains of industrial establishments making a sort of linear patterns.

Mumbai in India is considered as one of the leading industrial centres of the country. The deep water harbour facilities at this city enabled it to import industrial machinery as well as raw materials more conveniently than the other cities comparatively. The distance between the European countries and Mumbai is relatively less. Moreover, this city is also connected with other parts of the country by airways, railways and roadways. All these factors supported the rapid industrialization of Mumbai. The major industries of this town comprise manufacturing of cotton textiles, synthetic fibres, pharmaceuticals, industrial machinery, automobiles, electrical equipment, plastic and rubber goods, plastic raw materials and more. Mumbai is considered as the leading centre of petroleum refining and manufacture of petro-chemicals. In the western ghat, industrial machinery, chemicals, electrical equipment, industrial machinery, etc. are manufactured near Pune.

Bengaluru, Kolkata, Ahmedabad, Chennai, Coimbatore are some of the other major industrial centres of India. Ahmedabad produces a huge quantity of cotton piece goods. Textile as well as electrical machinery is also manufactured in this city. Fertilizers are manufactured near Baroda, which also has woollen textile mills. Pharmaceuticals and chemical products are also produced in Baroda. Moreover, petro-chemical complex for the production of organic chemicals has also been established here. Chemical industries that are based on salt have been set-up near Okha. Industrial belt in Hooghly near Kolkata is considered as really huge just next to Mumbai. Industrial machinery, automobiles, cotton textiles, chemicals, rubber goods, pharmaceutical products are produced in different industrial centres of West Bengal. Machine tools, railway coaches, electrical machinery, aircraft and watches are manufactured at Bengaluru.

Moreover, in Bihar Plateau and in the neighbouring parts of West Bengal, steel fabricating and metallurgical industries are of considerable significance. Further, high-grade iron-ore is found in abundance near Jamshedpur. Iron and steel producing plants are established at Jamshedpur, Asansol, Raurkela, Durgapur, Bokaro and Bhilai. Kanpur, Varanasi, Hyderabad, Faridabad, Ludhiana, Amritsar, Kota, Vishakhapatnam are other popular industrial centres of the country.