<P> The 15th Indian Census was conducted in two phases , house listing and population enumeration . House listing phase began on 1 April 2010 and involved collection of information about all buildings . Information for National Population Register was also collected in the first phase , which will be used to issue a 12 - digit unique identification number to all registered Indian residents by Unique Identification Authority of India ( UIDAI ) . The second population enumeration phase was conducted between 9 and 28 February 2011 . Census has been conducted in India since 1872 and 2011 marks the first time biometric information was collected . According to the provisional reports released on 31 March 2011 , the Indian population increased to 121 crore with a decadal growth of 17.64 % . Adult literacy rate increased to 74.04 % with a decadal growth of 9.21 % . The motto of census 2011 was ' Our Census , Our future ' . </P>
<P> The 15th Indian Census was conducted in two phases , house listing and population enumeration . House listing phase began on 1 April 2010 and involved collection of information about all buildings . Information for National Population Register was also collected in the first phase , which will be used to issue a 12 - digit unique identification number to all registered Indian residents by Unique Identification Authority of India ( UIDAI ) . The second population enumeration phase was conducted between 9 and 28 February 2011 . Census has been conducted in India since 1872 and 2011 marks the first time biometric information was collected . According to the provisional reports released on 31 March 2011 , the Indian population increased to 121 crore with a decadal growth of 17.64 % . Adult literacy rate increased to 74.04 % with a decadal growth of 9.21 % . The motto of census 2011 was ' Our Census , Our future ' . </P>
when was the last census done in india
when was the last census done in india
31 March 2011
31 March 2011