Barak valley had a population of 4,377,612 as per as 2021 census. Hinduism have gone-down from 50% in 2011 to 47% in 2021 due to low fertility rate and large scale immigration of the community from the Valley to others parts of the region in search of jobs and livelihood. The number of Hindu immigrants from Bangladesh into Barak Valley has varied estimates from year 1971-2014. According to the Assam government, (1.3-1.5) lakhs such people residing in the Barak Valley are eligible for citizenship if the Citizenship (Amendment) Act, 2019 becomes a law. Islam is the fastest growing religion in Barak valley, As per as 2011 census, Muslims were 48.1% in the valley and in 2021 census it have gone up to 51% due to high fertility rate and lower immigration of the community to others regions/parts of the country.