Population of Bihar is 103804637 which is one of populated state of India. Bihar is having 18.6 Million children in the 0-6 years age group as per Census 2011 data released today. Meanwhile India’s new national census has put the population at about 1.21 billion people, or 17% of the world population, the census commissioner said.The population comprising 623.7 million males and 586.5 million females is almost equal to the combined population of the United States, Indonesia, Brazil, Pakistan, Bangladesh and Japan put together. The population has increased by more than 181 million during the decade 2001-2011, the report said. The growth rate in 2011 is 17.64 per cent in comparison to 21.15 per cent in 2001.