Islam in Bahrain

Islam is the state religion in Bahrain. Due to an influx of immigrants and guest workers from India, the Philippines and Sri Lanka, the overall percentage of Muslims has declined since the late 20th century. Bahrain's 2010 census indicated that 90.2% of the population was Muslim.

In 2011, a Bahraini official document reported that Sunni Islam had become a slight 51% majority while Shia population had declined to 49%. Other unofficial sources estimate sectarian identification to be approximately 55% Sunni and 45% Shia.

There has been a decline in the Shia Muslim population and a massive increase in Sunni Muslim population in Bahrain as of 2021 due to the increasing rates of political naturalisation and citizenship grants to Sunni migrants, as well as Sunni Muslims in Bahrain having a higher proportion of young people, and a higher fertility rate.