The 1981 census of India was the 12th in a series of censuses held in India every decade since 1872.[1] The population of India was counted as 685,184,692 people.[2]
^Vijayanunni, M. (26–29 August 1998). "Planning for the 2001 Census of India based on the 1991 Census"(PDF). 18th Population Census Conference. Honolulu, Hawaii, US: Association of National Census and Statistics Directors of America, Asia, and the Pacific. Archived from the original(PDF) on 19 November 2008. Retrieved 25 March 2021.
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