section_path: Demographics/Religion
section_name: Religion
paragraph_text: Religion
  
  Official statistics on religion are unavailable because religious surveys were eliminated from government census reports after 1967. Tanzania's religious field is dominated by Christianity, Islam and African traditional religions connected to ethnic customs. The word for religion in Swahili, dini, generally apply to the world religions of Christianity and Islam meaning that followers of traditional African religions are considered to be of "no religion". Religious belonging is often ambiguous, with some people adhering to multiple religious identities at the same time (for instance being Christian but also following African traditional rituals) something which suggests that religious boundaries are flexible and contextual.
  
  According to a 2014 estimate by the CIA World Factbook, 61.4% of the population was Christian, 35.2% was Muslim, 1.8% practised traditional African religions, 1.4% were unaffiliated with any religion, and 0.2% followed other religions. However, according to the Association of Religion Data Archives (ARDA), 55.3% of the population is Christian, 31.5% is Muslim, 11.3% practices traditional faiths, while 1.9% of the population is non-religious or adheres to other faiths as of 2020. The ARDA estimates that most Tanzanian Muslims are Sunni, with a small Shia minority, as of 2020. Nearly the entire population of Zanzibar is Muslim. Of Muslims, 16% are Ahmadiyya, 20% are non-denominational Muslims, 40% are Sunni, 20% are Shia, and 4% are Sufi. Most Shias in Tanzania are from Asian/Indian descent. Notable Shias of Indian / Khoja heritage in Tanzania are Mohammed Dewji or Amir H. Jamal.
  
  Within the Christian community the Catholic Church is the largest group (51% all Christians). Among the Protestants, the large number of Lutherans and Moravians points to the German missionary past of the country, while the number of Anglicans point to the British missionary history of Tanganyika. A growing number have adopted Pentecostalism, and Adventists likewise have an increasing presence because of external missionary activities from Scandinavia and the United States, especially during the first part of the 20th century. 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.
  
  There are also active communities of other religious groups, primarily on the mainland, such as Buddhists, Hindus, and Bahá'ís.