According to the 2011 census Idukki district has a population of 1,107,453. This ranks it as 416th among the 640 districts of India. The district has a population density of . Its population growth rate over the decade 2001–2011 was −1.93%. Idukki has a sex ratio of 1006 females for every 1000 males, and a literacy rate of 92.2 per cent. According to the 2011 census, Hindus make up 48. 86% (541,854) of the population, Christians 43.42% (481,507), Muslims 7.41%(82,206). 