The U.S. government estimates the total population at 211.7 million (midyear 2019 estimate). According to a 2019 Datafolha survey, 50 percent of the population identifies as Roman Catholic, the same as the previous survey in 2016 but down from 60 percent in 2014. Atheists and those with no religion represent 11 percent, and the proportion of evangelical Christians is 31 percent, compared with 24 percent in 2016. Two percent practice Afro-Brazilian religions, and three percent are Spiritists. According to the 2010 census, which is the most recently available data from official sources, 65 percent of the population is Catholic, 22 percent Protestant, eight percent irreligious (including atheists, agnostics, and deists), and two percent Spiritist. Adherents of other Christian groups, including Jehovah’s Witnesses, The Church of Jesus Christ of Latter-day Saints, Seventh-day Adventists, as well as followers of non-Christian religions, including Buddhists, Jews, Muslims, Hindus, and Afro-Brazilian and syncretic religious groups, such as Candomble and Umbanda, make up a combined three percent of the population. According to the census, there are approximately 600,000 practitioners of Candomble, Umbanda, and other Afro-Brazilian religions, and some Christians also practice Candomble and Umbanda. According to recent surveys, many Brazilians consider themselves followers of more than one religion.

According to the 2010 census, approximately 35,200 Muslims live in the country, while the Federation of Muslim Associations of Brazil estimates the number to be 1.2 to 1.5 million. The largest communities reside in Sao Paulo, Rio de Janeiro, Curitiba, and Foz do Iguacu, as well as in smaller cities in the states of Parana and Rio Grande do Sul.

According to the Jewish Confederation of Brazil, there are approximately 125,000 Jews in the country. The two largest concentrations are 65,000 in Sao Paulo State and 33,000 in Rio de Janeiro State.

The U.S. government estimates the total population at 10.6 million (midyear 2020 estimate). According to research polls, 81 to 90 percent of the population identifies as Greek Orthodox, 4 to 15 percent atheist, and 2 percent Muslim.

Approximately 140,000 Muslims live in Thrace, according to government sources using 2011 data; they are largely descendants of the officially recognized Muslim minority according to the 1923 Treaty of Lausanne. According to a Pew Research Center study released in November 2017, an additional 520,000 Muslims – mostly asylum seekers, refugees, and other migrants from Southeastern Europe, South and Southeast Asia, the Middle East, and North Africa – reside throughout the country, clustered in communities by their countries of origin or in reception facilities. Government sources estimate half reside in Athens.

Members of other religious communities that together constitute less than 5 percent of the population include Old Calendarist Orthodox, Catholics, Protestants, Jehovah’s Witnesses, Jews, members of polytheistic Hellenic religions, Scientologists, Baha’is, members of The Church of Jesus Christ of Latter-day Saints, Sikhs, Seventh-day Adventists, Buddhists, and members of the International Society of Krishna Consciousness (ISKCON). Independent and media sources estimate Ethiopian Orthodox number 2,500, and Assyrians less than 1,000. According to the Armenian Orthodox Archbishop, interviewed in 2018, approximately 100,000 Armenian Orthodox live in the country.

The U.S. government estimates the total population at 62.4 million (midyear 2020 estimate). According to a 2019 study (the most recent available) conducted by IPSOS, an independent research center, 69 percent of the population identifies as Catholic, and another 12 percent does not participate in religious activities. The IPSOS study indicates non-Catholic Christian groups account for approximately 16 percent of the population and include Eastern Orthodox, Jehovah’s Witnesses, Assemblies of God, the Methodist and Waldensian Churches, The Church of Jesus Christ of Latter-day Saints (Church of Jesus Christ), the Union of Pentecostal Churches (UCP), and several other smaller Protestant groups, including other evangelical Christian groups. According to the national branch of the Church of Jesus Christ, there are approximately 26,000 adherents in the country. According to national newspaper La Repubblica, most followers are in Lombardy, Sicily, and Lazio Regions. According to government officials, non-Christian religious groups that together account for less than 10 percent of the population include Muslims, Jews, Hindus, Baha’is, Buddhists, Sikhs, the International Society for Krishna Consciousness (ISKCON), and Ananda Marga Pracaraka Samgha, an Indian spiritual movement.

The UCEI estimates the Jewish population numbers 28,000. According to the legal counsel of the Italian Federation of Progressive Judaism (FIEP), FIEP has a prayer room in Milan and between 500 and 600 members, including Jews who are registered and unregistered in the local communities. The country’s progressive Jews are organized into four congregations in Rome, Florence, and Milan.

A 2019 report on immigration released by independent research center IDOS estimated 1.73 million Muslims – approximately 3 percent of the population – live in the country. According to the Ministry of Interior (MOI) and the national agency for statistics, the Muslim population includes native-born citizens, immigrants, and resident foreigners, but most of its growth comes from large numbers of immigrants from Eastern Europe, Africa, the Middle East, and South Asia, the majority of whom live in the north. Moroccan- and Albanian-origin Muslims make up the largest established groups, while Tunisia and Pakistan are increasingly prominent sources of Muslims arriving as seaborne migrants. The MOI reports Muslims are overwhelmingly Sunni.

The U.S. government estimates the total population at 65.8 million (midyear 2020 estimate). Census figures from 2011, the most recent, indicate 59.3 percent of the population in England and Wales is Christian. Of the remaining population, 4.8 percent identified as Muslim; 1.5 percent Hindu; 0.8 percent Sikh; 0.5 percent Jewish; and 0.4 Buddhist. Approximately 25 percent of the population reported no religious affiliation in the 2011 census, and 7 percent chose not to answer. Jehovah’s Witnesses estimate there are 137,000 members in the country, and the Baha’i community estimates it has more than 7,000 members.

According to the 2019 British Social Attitudes survey, an annual survey conducted by the independent National Center for Social Research, 52 percent of those surveyed UK-wide described themselves as having no religion, 12 percent as Anglican, 7 percent as Catholic, and 9 percent as belonging to non-Christian religious groups. The survey showed 6 percent of individuals identified as Muslim, less than 0.5 percent as Jewish, and 3 percent as “other non-Christian.”

The Muslim community in England and Wales is predominantly of South Asian origin, but it also includes individuals from the Arabian Peninsula, the Levant, Africa, and Southeast Asia, as well as a growing number of converts of British and other European descent. Hindus, Sikhs, Jews, and Buddhists are concentrated in London and other large urban areas, primarily in England.

Census figures for Scotland in 2011 indicate 54 percent of the population is Christian, comprising the Church of Scotland (32 percent), Roman Catholic Church (16 percent), and other Christian groups (6 percent). The Muslim community constitutes 1.4 percent of the population. Other religious groups, which together make up less than 1 percent of the population, include Hindus, Sikhs, Jews, and Buddhists. Persons not belonging to any religious group make up 36.7 percent of the population, and the remainder did not provide information on religious affiliation.

A 2017 Scottish Social Attitudes Survey found 58 percent of those surveyed did not identify with any religion, 18 percent identified as part of the Church of Scotland, 10 percent as Roman Catholic, 11 percent as other Christian, and 2 percent as non-Christian.

Census figures from Northern Ireland in 2011 indicate 41.5 percent of the population is Protestant – consisting of the Presbyterian Church of Ireland (19 percent), Church of Ireland (14 percent), Methodist Church in Ireland (3 percent), and other Protestant groups (6 percent) – and 41 percent Roman Catholic. Less than 1 percent of the population belongs to non-Christian religious groups, and approximately 10 percent professes no religion; 7 percent did not indicate a religious affiliation.

In his 2019 ‘Sectarianism in Northern Ireland’ report, Ulster University Professor Duncan Morrow found there is a “clear statistical trend towards a change in the religious minority-majority structure of Northern Ireland.” His research illustrates a consistent decline of Protestants in all 26 district council areas of Northern Ireland since 2001, contrasted with an increased Catholic population in 19 of 26 council areas in the same time period. Morrow’s analysis of 2011 census figures also illustrates this trend is likely to continue. Census figures show a Protestant majority in the over-60 age bracket and a Catholic majority in the under-20 age bracket. Professor Paul Nolan of Queen’s University Belfast stated based on current statistical trends, there will be a Catholic majority in Northern Ireland by 2021, when the next census will be conducted.

Census figures from Bermuda in 2010 cite 22 religious groups in the population of 71,000; 78 percent identifies as Christian, including 16 percent Anglican, 15 percent Roman Catholic, 9 percent African Methodist Episcopal, and 7 percent Seventh-day Adventist. Approximately 2 percent identifies with other religious groups, including approximately 600 Muslims, 200 Rastafarians, and 120 Jews. Approximately 20 percent did not identify with or state a religious affiliation.