New Delhi the capital city of India has approximately 32,941,000 residents.

Additional information:
www.delhiinfo.com
www.travel-delhi.com
www.delhimarket.com

The other main cities, and their populations, in descending order are:
Mumbai (Bombay)approximately 21,297,000 residents
www.mumbainet.com
www.mumbaibombay.net

Kolkata (Calcutta)approximately 15,332,793 residents
www.calcuttaweb.com
www.calonline.com

Bangalore approximately 13,608,000 (Bangalore is considered India's Silicone Valley)

Chennai (Madras) approximately 11,800,000

Ahmedabad approximately 8,650,605

Hyderabad approximately 10,801,000

Kanpur approximately 3,234,000