The U.S. government estimates the total population at 1.30 billion (July 2018 estimate).  According to the 2011 national census, the most recent year for which disaggregated figures are available, Hindus constitute 79.8 percent of the population, Muslims 14.2 percent, Christians 2.3 percent, and Sikhs 1.7 percent.  Groups that together constitute less than 1 percent of the population include Buddhists, Jains, Zoroastrians (Parsis), Jews, and Baha’is.  The Ministry of Tribal Affairs officially classifies more than 104 million members of Scheduled Tribes – indigenous groups historically outside the caste system who often practice animism and indigenous religious beliefs – as Hindus in government statistics.  Approximately one-third of Christians also are listed as part of Scheduled Tribes.

According to government estimates, there are large minority Muslim populations in Uttar Pradesh, Bihar, Maharashtra, West Bengal, Telangana, Karnataka, and Kerala states.  Muslims constitute 68.3 percent of the population in Jammu and Kashmir, the only state in which Muslims constitute a majority.  Slightly more than 85 percent of Muslims are Sunni; most of the rest are Shia.  Christian populations are found across the country but in greater concentrations in the northeast, as well as in southern states of Kerala, Tamil Nadu, and Goa.  Three small northeastern states have large Christian majorities:  Nagaland (90 percent of the population), Mizoram (87 percent), and Meghalaya (70 percent).  Sikhs constitute 54 percent of Punjab’s population.  The Dalai Lama’s office estimates there are significant resettled Tibetan Buddhist communities in Himachal Pradesh, Karnataka, Uttarakhand, and Delhi.  According to the United Nations High Commissioner for Refugees, there are approximately 108,000 Tibetan Buddhists in the country and 21,000 Muslim refugees from Burma.