Religion in Tanzania

[4] Current statistics on the relative sizes of various religions in Tanzania are limited because religious questions have been eliminated from government census reports since 1967.

Estimates for 2010 published by the Pew Research Center in 2012 indicated that 61.4% of the population were Christian, 35.2% Muslim, 1.8% practiced traditional folk religions and 1.4% were unaffiliated.

[3] A projection by the Pew Research Center based on these numbers estimated that 63% of the population in 2020 were Christian, 34% Muslim, 2% unaffiliated and 1% adhered to various Folk religions.

[6] According to a Pew Research Center study conducted in 2012, 40% of the Muslim population of Tanzania identifies as Sunni, 20% as Shia, and 15% as Ahmadiyya, with 20% not specifying a denomination.

All of them have had some influence in varying degrees from the Walokole movement (East African Revival), which has also been fertile ground for the spread of charismatic and Pentecostal groups.

The main body of law in Tanzania and Zanzibar is secular, but Muslims have the option to use religious courts for family-related cases.