— 1981 2,546,000 41.8% 1991 4,544,000 78.5% 2001 5,705,000 25.6% Source: Census of India [ 8 ] Shown here is a famous Hindu Temple - Birla Mandir The city's population in 2001 was 5.7 million and it has reached over 7 million by 2009 making it one of the most populous cities