The U.S. government estimates the total population at 45.1 million (midyear 2019 estimate). Religious demographic and statistical data from nongovernmental organizations (NGOs), research centers, and religious leaders vary. According to a 2019 survey by Conicet, the country’s national research institute, 62.9 percent of the population is Catholic; 15.3 Protestant, including evangelical groups; 18.9 percent no religion, which includes agnostics; 1.4 percent Jehovah’s Witnesses and The Church of Jesus Christ of Latter-day Saints (Church of Jesus Christ); 1.2 percent other, including Muslims and Jews; and 0.3 percent unknown. Other sources state Seventh-day Adventists, Baptists, Jehovah’s Witnesses, Lutherans, Methodists, and members of the Church of Jesus Christ together total 3 percent of the population. According to AMIA, there are 220,000 Jews in the country, and the Islamic Center estimates the Muslim population at 800,000 to 1,000,000. Evangelical Christian communities, particularly Pentecostals, are growing, but no reliable statistics are available. There is also a small number of Baha’is, Buddhists, and adherents of indigenous religions in the country; however, no data are available on the size of these groups.

The U.S. government estimates the total population at 67.6 million (midyear 2019 estimate). The law prohibits government collection of data based on race, ethnicity, or religion. However, a wide range of unofficial statistics and studies circulate.

A report released in July by the Observatory for Secularism, a government-appointed commission, in cooperation with polling company Viavoice, presented estimated figures of those who identified as part of a religion or felt tied to a religion. According to the report, whose figures are consistent with other estimates, 48 percent of respondents identify as Catholic, 3 percent Muslim, 3 percent Protestant, 2 percent Buddhist, 0.7 percent Jewish, 0.6 percent, and 1 percent other religion; 34 percent said they have no religious affiliation and 7 percent preferred not to respond. The same report estimates “other” religions’ numbers as follows: Jehovah’s Witnesses, 140,000-250,000, and Hindus, 150,000-300,000. In addition, the observatory’s report stated 31 percent consider themselves nonbelievers or atheists.

The report stated the number of residents linked to Islam in the poll was likely underestimated, as some Muslim and Muslim-affiliated residents may have declined to state their religion. According to the report, the “most precise” estimate of the Muslim population, based on multiple polls and demographic extrapolation, is likely between 3.3 and 5.0 million residents. The report stated the Muslim population corresponds with the arrival of immigrant populations, particularly from the Mediterranean and West Africa. The report also tied Hindu and Buddhist populations to immigrant communities.

The report attributes the growth in the Protestant community, from 2.5 percent of the population in 2010 to 3.1 percent during the year, to the growing number of Evangelical Christians, who number approximately one million.

The U.S. government estimates the total population at 62.3 million (midyear 2019 estimate). According to a 2019 survey by Doxa, an independent Italian research center, approximately 67 percent of the population identifies as Roman Catholic. According to government officials, religious groups together accounting for less than 10 percent of the population include other Christians, Muslims, Jews, Hindus, Baha’is, Buddhists, the International Society for Krishna Consciousness (ISKCON), the Union of Pentecostal Churches (UCP), and Ananda Marga Pracaraka Samgha, an Indian spiritual movement. 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), and several smaller Protestant 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. The UCEI estimates the Jewish population numbers 28,000. According to the legal counsel of the Italian Federation of Progressive Judaism (FIEP), FIEP has approximately 600 members, and includes both 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 and represented by the Italian Federation of Progressive Judaism, part of the World Union for Progressive Judaism. Doxa reports 15 percent of the population are nonbelievers or have no religious affiliation.

According to the UCOII, approximately 2.5 million Muslims – approximately 4 percent of the population – live in the country. According to the Ministry of interior (MOI) and the national agency for statistics, the Muslim population is composed of 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 important sources of seaborne migrant arrivals. The MOI reports Muslims are overwhelmingly Sunni.