New Delhi the capital city of India has approximately 34,666,000 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 22,089,000 residents
www.mumbainet.com
www.mumbaibombay.net

Kolkata (Calcutta)approximately 20,100,793 residents
www.calcuttaweb.com
www.calonline.com

Bangalore approximately 14,395,000 (Bangalore is considered India's Silicone Valley)

Chennai (Madras) approximately 12,336,000

Ahmedabad approximately 9,062,000

Hyderabad approximately 11,338,000

Kanpur approximately 3,345,370