India consists of twenty-eight states and nine union territories.
[3] The census in India is carried out by the Office of the Registrar General and Census Commissioner under the Ministry of Home Affairs, and is one of the largest administrative tasks conducted by a federal government.
[4] The latest population figures are based on data from the 2011 Census of India.
[5] India has 641,000 inhabited villages and 72.2 percent of the total population reside in these rural areas.
[6] In the decade of 1991–2001, migration to major cities caused rapid increase in urban population.