Tanzania
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  Preferred Religion (2015)1: Western Christian

  Majority Religion (2015)2: Protestant (incl. Anglican, Pentecostal) (24.2%)

Religious Adherents, (2015)2

Tanzania Eastern Africa World
Christian (all denominations combined) 55.2% 65.3% 29.9%
 
  • Catholic
  • 22% 20.1% 15%
     
  • Protestant
  • 14.8% 15.8% 5.6%
     
  • Pentecostal
  • 5.4% 8.9% 2.8%
     
  • Anglican
  • 4% 7% 1.2%
     
  • Other and Unknown Christian
  • 8.9% 2.7% 2.3%
    Muslim (all denominations combined) 29.7% 22.1% 22.8%
     
  • Sunni Muslim
  • 17.3% 19.8% 19%
     
  • Shia Muslim
  • 7.1% 1.4% 3.4%
     
  • Other and Unknown Muslim
  • 5.3% 0.9% 0.3%
    Ethnoreligionist (incl. Animist, Shamanist) 11.5% 8.7% 2.5%
    Hindu 0.9% 0.4% 14.5%
    Bahai 0.4% 0.3% 0.1%
    Christian Syncretic 0.2% 1.4% ---
    Other Religionist 0.1% 0.1% 0.2%
    Not Religious (incl. Atheist) 0.4% 0.5% 12%
    Unknown 1.7% 1.2% 4.8%

    Religious Demography3

    The country has an area of 364,900 square miles and a population of 40 million, of which 38 million live on the mainland and 2 million on the Zanzibar archipelago, which has a semi autonomous political structure separate from the mainland political system. Current statistics on religious demography are unavailable because religious surveys were eliminated from government census reports after 1967. Religious leaders and sociologists estimate that the Christian and Muslim communities are equal in size, each accounting for 30 to 40 percent of the population, with the remainder consisting of practitioners of other faiths and traditional indigenous religions. However, 99 percent of the population on the Zanzibar archipelago is Muslim.

    On the mainland, Muslim communities are concentrated in coastal areas, with some large Muslim minorities also in inland urban areas. Between 80 and 90 percent of the Muslim population is Sunni; the remainder consists of several Shi'a subgroups, mostly of Asian descent. The Christian population is mostly composed of Roman Catholics, Protestants, Pentecostals, Seventh-day Adventists, members of the Church of Jesus Christ of Latter-day Saints (Mormons), and members of Jehovah's Witnesses. There are also active communities of other religious groups, primarily on the mainland, such as Buddhists, Hindus, and Baha'is.


    Sources

    1.  The Religious Characteristics of States Dataset Project: Government Religious Preference (GRP) measures government-level favoritism toward, and disfavor against, 30 religious denominations. A series of ordered categorical variables index the state's institutional favoritism in 28 different ways. The variables are combined to form five composite indices for five broad components of state-religion: official status, religious education, financial support, regulatory burdens, and freedom of practice. The five components' composites in turn are further combined into a single composite score, the GRP score. The RCS Data Project would like to acknowledge, recognize, and express our deepest gratitude for the significant contributions of Todd M. Johnson the principal investigator of the World Christian Database and the co-principal investigator of the World Religion Database.

    2.  The Religious Characteristics of States Dataset Project: Demographics reports the estimates of religious demographics, both country by country and region by region. The RCS was created to fulfill the unmet need for a dataset on the religious dimensions of countries of the world, with the state-year as the unit of observation. It estimates populations and percentages of adherents of 100 religious denominations including second level subdivision within Christianity and Islam. The RCS Data Project would like to acknowledge, recognize, and express our deepest gratitude for the significant contributions of Todd M. Johnson the principal investigator of the World Christian Database and the co-principal investigator of the World Religion Database.

    3.  The U.S. State Department's International Religious Freedom Report is submitted to Congress annually by the Department of State in compliance with Section 102(b) of the International Religious Freedom Act (IRFA) of 1998. This report supplements the most recent Human Rights Reports by providing additional detailed information with respect to matters involving international religious freedom. It includes individual country chapters on the status of religious freedom worldwide. A dataset with these and the other international measures highlighted on the country pages can be downloaded from this website. These State Department reports are open source.

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