1. Mumbai-Pune Industrial Region:
This region extends from Thane to Pune and in adjoining districts of Nashik and Solapur. The growth of this industrial region is fully connected with the growth of cotton textile industry in India.
2. The Hugli Industrial Region:
Located in West Bengal, this region extends as a narrow belt running along the river Hugli for a distance of about 100 km from Bansbaria and Naihati in the north to Birlanagar in the south. Jute, Paper, engineering, textile machinery, electrical, chemical, pharmaceuticals, fertilizers and petrochemical industries have developed in this region.
3. Bangalore-Tamil Nadu Industrial Region:
Spread in two states of Karnataka and Tamil Nadu, this region experienced the fastest industrial growth in the post-independence era. This region is a cotton-growing tract and is dominated by the cotton-textile industry.
4. Gujarat Industrial Region:
The nucleus of this region lies between Ahmedabad and Vadodara as a result of which it is also known as Ahmedabad-Vadodara industrial region. This region became the important textile region with the decline of cotton textile industry in Mumbai.