The U.S. government estimates the total population at 5.8 million (July 2018 estimate).  According to an October estimate by Statistics Denmark, the government statistical office, 75 percent of all citizens are members of the ELC.

The University of Copenhagen’s Department of Cross-Cultural and Regional Studies estimated in October 2017 that Muslims constitute 5.3 percent of the population.  Muslim groups are concentrated in the largest cities, particularly Copenhagen, Odense, and Aarhus.  The Ministry of Foreign Affairs estimates other religious groups, each constituting less than 1 percent of the population, include, in descending order of size, Roman Catholics, Jehovah’s Witnesses, Serbian Orthodox Christians, Jews, Baptists, Buddhists, members of The Church of Jesus Christ of Latter-day Saints, Pentecostals, and nondenominational Christians.  Although estimates vary, the Jewish Society (previously known as Mosaike) stated the Jewish population numbers approximately 7,000, most of whom live in the Copenhagen metropolitan area.  A 2017 Pew Research Center poll found 30 percent of persons identified as religiously unaffiliated.

The U.S. government estimates the total population at 67.4 million (July 2018 estimate).  According to the most recent study by the National Institute for Demographic and Economic Studies, conducted in 2008 and published in 2010, 45 percent of respondents aged 18-50 reported no religious affiliation, while 43 percent identified as Roman Catholic, 8 percent as Muslim, 2 percent as Protestant, and the remaining 2 percent as Orthodox Christian, Buddhist, Jewish, or other.

A poll conducted in March by the private firm Opinionway found 41 percent of respondents older than 18 years identify as Catholic, 8 percent Muslim, 3 percent Protestant, 1 percent Buddhist, and 1 percent Jewish; 43 percent said they have no religious affiliation.

According to a survey conducted in March by the Catholic Institute of Paris and St. Mary’s Catholic University in the United Kingdom, 64 percent of young people aged 16-29 in France declared themselves without a religion compared with 23 percent who said they were Catholic and 10 percent who said they were Muslim.

The MOI estimates 8-10 percent of the population is Muslim.  The Muslim population consists primarily of immigrants from former French colonies in North and sub-Saharan Africa and their descendants.  According to a Pew Research Center study published in November 2017, Muslims number 5.72 million, 8.8 percent of the total population.

According to a 2017 Ipsos study published in Reforme, a Protestant online news daily, there are an estimated 600,000 Lutheran, 600,000 evangelical, and 800,000 nondenominational members in the Protestant community.  Many evangelical churches primarily serve African and Caribbean immigrants.

A 2016 report by Berman Jewish Data Bank estimated there are 460,000-700,000 Jews, depending on the criteria chosen.  According to the study, there are more Sephardic than Ashkenazi Jews.

The Buddhist Union of France estimates there are one million Buddhists, mainly Chinese and Vietnamese immigrants and their descendants.  Other religious groups estimate their numbers as follows:  Jehovah’s Witnesses, 120,000; Orthodox Christians, most of whom are associated with the Greek or Russian Orthodox Churches, 80,000-100,000; The Church of Jesus Christ of Latter-day Saints, 66,000; Church of Scientology, 45,000; and Sikhs, 30,000.

The U.S. government estimates the total population at 80.5 million (July 2018 estimate).  Unofficial estimates based on the census and figures provided by religious groups indicate approximately 29 percent of the population is Roman Catholic, and 27 percent belongs to the EKD – a confederation of Lutheran, Reformed (Calvinist), and United (Prussian Union) Protestant regional churches.  Other Protestant denominations, including the New Apostolic Church, Baptist communities, and nondenominational Christians, combined account for less than 1 percent of the population.  Orthodox Christians represent 2.4 percent of the population.

According to government estimates, approximately 6.3 percent of the population is Muslim, of which 75 percent is Sunni, 13 percent Alevi, and 7 percent Shia; the remainder identifies simply as “Muslim.”  According to the Ministry of Interior, approximately 25 percent of Muslims are recent immigrants; between 2011 and 2015, an estimated 1.2 million refugees arrived from predominately Muslim countries.  Estimates of the Jewish population vary widely; the Central Council of Jews estimates it at 200,000.  The Central Welfare Office for Jews in Germany reported that Jewish communities had approximately 100,000 members at the end of 2017.  According to Religious Studies Media and Information Service (REMID), a secular, religious studies NGO, groups that together constitute less than 1 percent of the population include Buddhists (270,000); Jehovah’s Witnesses (222,000); Hindus (100,000); Yezidis (100,000); The Church of Jesus Christ of Latter-day Saints (Church of Jesus Christ) (40,000); Sikhs (15,000); and COS (5,000-10,000).  All of REMID’s estimates are based only on members who have registered with a religious group.  According to the nonprofit Research Group Worldviews Germany, approximately 36 percent of the population either has no religious affiliation or belongs to religious groups not counted in the government’s statistics.

The U.S. government estimates the total population at 49.3 million (July 2018 estimate).  According to a survey conducted in April by the governmental Center for Sociological Research, 67.4 percent of respondents identified themselves as Catholic and 2.6 percent as followers of other religious groups.  In addition, 15.6 percent described themselves as “nonbelievers” and 12.2 percent as atheists; the remaining 2.3 percent did not answer the question.

The (Catholic) Episcopal Conference of Spain estimates there are 32.6 million Catholics.  The Federation of Evangelical Religious Entities (FEREDE) estimates there are 1.7 million Protestants, 900,000 of whom are immigrants.  The Union of Islamic Communities of Spain (UCIDE), the largest member organization of the Islamic Commission of Spain (CIE), estimates there are 1.9 million Muslims, while other Muslim groups estimate a population of up to two million.  According to the MOJ’s 2017 report on religious freedom, citing estimates by religious groups, the Federation of Jewish Communities of Spain (FCJE) estimates there are 45,000 Jews; the Episcopal Orthodox Assembly stated in 2014 there were 1.5 million Orthodox Christians; the Jehovah’s Witnesses report 188,000 members; the Federation of Buddhist Communities estimates there are 85,000 Buddhists; and The Church of Jesus Christ of Latter-day Saints (Church of Jesus Christ) cites 57,000 members.  Other religious groups include Christian Scientists, other Christian groups, Baha’is (12,000 members), Scientologists (11,000 members), and Hindus.  The autonomous communities of Catalonia, Andalusia, and Madrid and the autonomous cities of Ceuta and Melilla in North Africa contain the highest percentage of non-Christians, nearly 50 percent in the latter two cities.

The U.S. government estimates the total population at 17.2 million (July 2018 estimate).  In a 2017 survey of persons aged 15 or older by the government’s Statistics Netherlands, 51 percent of the population declared no church affiliation, 23 percent self-identified as Roman Catholic, 15 percent as Protestant, 5 percent as Muslim, and 6 percent as “other,” including Hindu, Jewish, Buddhist, and Baha’i.

Most Muslims live in urban areas and are of Turkish, Moroccan, or Surinamese background.  The Muslim population also includes recent immigrants and asylum seekers from other countries, including Iran, Iraq, Somalia, Syria, and Bosnia and Herzegovina.  The Liberal Jewish Community, the largest Jewish community in the country, estimates the number of Jews at 40-50,000.  A Statistics Netherlands study from 2015 estimated the number of Hindus at 10,000, of whom approximately 85 percent are of Surinamese descent and 10 percent of Indian descent.  The Buddhist community has approximately 17,000 members, according to a 2007 report by the governmental Netherlands Institute for Social Research (SCP), the most recent estimate available.