Religion in Europe - statistics & facts

Religion in Europe - A Continent in Transition

Europe's religious landscape is undergoing a profound transformation. Christianity remains the dominant faith, claiming around 72% of the population (roughly 535 million people), but its grip is loosening as secularisation spreads. The religiously unaffiliated - atheists, agnostics, and those with no particular faith - have grown to about 20% (148 million), while Islam has risen to nearly 7% (50 million), making it the second-largest individual religion after Christianity.

The most striking trend is the decades-long pattern of religious "switching," in which people raised as Christians become unaffiliated. This widespread disaffiliation has thinned Europe's Christian population and swelled the ranks of the non-religious, fundamentally reshaping the continent's identity over a single generation. Between 2010 and 2020 alone, France and the United Kingdom lost their Christian majorities, while the Netherlands gained an unaffiliated majority - landmark shifts in a historically Christian continent.

Yet Europe is far from uniform. Religiosity varies enormously by country and region: Central and Eastern European nations like Romania, Poland, and Greece remain deeply religious, while Western and Northern European countries like Czechia, Estonia, Sweden, and the Netherlands are among the most secular societies on Earth. This patchwork of belief and non-belief defines modern European religion, making any single statement about "European religion" an oversimplification of a deeply varied reality.

Religion in Europe by Share of Population

The table shows Christianity's continued dominance, but the gap is narrowing as the unaffiliated grow. Islam is the largest non-Christian religion, while Hinduism, Buddhism, Judaism, and folk religions each account for less than 1% of the population. The overall European population providing this base is around 740 million. The broader demographic context is in our world population analysis.

The Religious Composition of Europe

Christianity's 72% share encompasses three main branches: Roman Catholicism (strongest in Southern and Central Europe), Protestantism (dominant in Northern Europe), and Eastern Orthodoxy (prevalent in Eastern Europe and Russia). Despite this dominance, the trend line points firmly downward, with the unaffiliated steadily gaining ground decade after decade. Many who still identify as Christian are non-practising, attending services rarely if at all - a phenomenon sometimes called "cultural Christianity" or "belonging without believing." The economic dimensions of these demographic shifts connect to our global economy analysis.

The Slow Decline of Christianity in Europe

Christianity has been the dominant religion in Europe since the 4th century, when the Roman Empire adopted it, shaping the continent's culture, politics, art, law, and institutions for over 1,500 years. Cathedrals, universities, hospitals, and much of European art and music owe their origins to the Christian tradition. Yet its position is eroding. Between 2010 and 2020, the absolute number of Christians in Europe dropped by 9% to around 505 million, even as the total population grew slightly. This decline is driven primarily by religious switching - people raised Christian who become unaffiliated - rather than by deaths or emigration. Each year, more people leave Christianity than join it, a net outflow that has accelerated across most of Western and Central Europe over the past two decades.

The decline is most pronounced in Western and Northern Europe. In Germany, the share identifying as Catholic fell from 46% in 1950 to just under 25% by 2023. France and the UK both lost their Christian majorities between 2010 and 2020. By contrast, Christianity remains strong in Southern and Eastern Europe, where countries like Poland, Romania, and Portugal retain large, active Christian populations. The population dynamics behind these trends are in our world religions analysis.

The Rise of the Religiously Unaffiliated

The religiously unaffiliated are Europe's fastest-growing belief group, now accounting for around 20% of the population (148 million). This group spans atheists, agnostics, and those who simply have no particular religion. The trend is most advanced in the Netherlands, where the non-religious became the majority (rising from 45% to 56% between 2010 and 2024), making the unaffiliated group larger than any single Christian church. Czechia, Estonia, and Sweden show similar or even more advanced secularisation, with the unaffiliated now the dominant group. Pew researchers note that the main competitor to Christianity in Europe is not Islam, but religious non-affiliation - the steady drift of people away from organised religion altogether. This makes the unaffiliated, rather than any rival faith, the defining force reshaping European religion. The broader social trends connect to our social media statistics analysis.

Islam - Europe's Second-Largest Religion

Islam is Europe's second-largest religion (or third, if the unaffiliated are counted as a group), with around 50 million adherents making up about 6.8% of the population. The Muslim population has grown steadily through migration - including migrant workers, residents of former colonies, and refugees - as well as higher fertility rates compared to other groups. France has the highest Muslim share in Western Europe at around 9% of its population, the legacy of immigration from North Africa.

Muslim populations are concentrated in specific countries. France is forecast to have over six million Muslims by 2030; Spain recorded 2.3 million in 2022; and in Italy, foreign-national Muslims numbered roughly 1.6 million in 2020, many of Moroccan or Albanian origin. In the Netherlands, the Muslim share has held steady at around 6% since 2010, showing that Muslim populations are not growing uniformly across the continent but are concentrated in particular countries with specific migration histories. Islam is projected to grow faster than any other major religion in Europe over the coming decades, though it will remain a minority faith well below Christianity and the unaffiliated. Even under high-migration scenarios, Pew projects Muslims will make up well under 15% of Europe's population by 2050, far from the alarmist claims sometimes made in public debate. The migration patterns driving this connect to our world population analysis.

The Most Religious Countries in Europe

The most religious countries are concentrated in Central, Eastern, and Southern Europe. In nations like Romania, Bosnia, Greece, and Armenia, half or more of adults say religion is very important in their lives. Poland stands out as Central Europe's most religious large nation, deeply Catholic and resistant to the secular trends elsewhere, while Portugal (37% highly religious) is notably more religious than its Western European neighbours, closer to Poland than to neighbouring Spain in its levels of devotion. These countries have largely resisted the secularisation sweeping the rest of the continent, often because religion is closely tied to national identity, historical struggle, or resistance to past oppression. In Poland, for example, the Catholic Church played a central role in the nation's history and its opposition to communism, cementing its place in Polish identity. How people across these nations connect online is in our biggest social media platforms analysis.

The Least Religious Countries in Europe

The least religious countries are clustered in Western and Northern Europe and parts of Central Europe. Czechia is the most secular, with around 72% of the population religiously unaffiliated - among young adults, that figure rises to 91%. Estonia, Sweden, the Netherlands, and Norway also have very high shares of non-religious people. France (43% unaffiliated) and the UK (over 50%) have both lost their Christian majorities, reflecting the deep secularisation of Western Europe. France, in particular, has a strong tradition of laicite (state secularism) dating back to its 1789 revolution, which has shaped a culture where religion is largely a private matter kept out of public life. These trends connect to broader social changes in our internet companies revenue analysis.

Largest Christian Populations by Country

By absolute numbers, Russia has the largest Christian population in Europe at around 100 million (predominantly Eastern Orthodox), followed by Germany (53M), Italy (50M), and the UK (38M). These figures reflect both population size and Christianity's historical depth in each nation. Russia's dominance is driven by the Russian Orthodox Church, which has experienced a revival since the fall of the Soviet Union, when state atheism was abandoned and religious practice was once again permitted and even encouraged by the state. While Western European countries like Germany and the UK have large Christian populations in absolute terms, their share of the total population is falling fast. The wider global picture of faiths is in our world religions analysis.

The Future of Religion in Europe

Europe's religious future points toward continued secularisation and growing diversity. Pew Research projects that Christianity's share will fall from around 75% in 2010 to about 65% by 2050, with the absolute Christian population dropping from 553 million to roughly 454 million. The religiously unaffiliated will grow from 140 million to around 162 million, while Europe's Muslim population is projected to increase by 63%, from 43 million to 71 million.

The low overall fertility rate in Europe (1.6) is largely responsible for the projected decline of religions with below-replacement fertility, including Christians (1.6) and the unaffiliated (1.4). Islam's higher fertility and younger population, combined with migration, drive its faster growth. By mid-century, Europe will likely be a more religiously diverse and more secular continent than at any point in its history. The combination of a shrinking Christian majority, a growing unaffiliated population, and a slowly expanding Muslim minority points toward a fundamentally different religious landscape from the one that defined Europe for most of the past millennium. The long-term population trends are in our US population demographics analysis.

The Three Branches of European Christianity

European Christianity is not monolithic - it divides into three major branches, each dominant in different regions. Roman Catholicism is strongest in Southern and Central Europe (Italy, Spain, Portugal, Poland, Ireland), Protestantism prevails in Northern Europe (the Nordic countries, parts of Germany, the UK historically), and Eastern Orthodoxy dominates in Eastern Europe and Russia (Greece, Romania, Serbia, Russia, Ukraine).

These divisions reflect centuries of history, from the Great Schism of 1054 that split Eastern Orthodoxy from Roman Catholicism, to the Protestant Reformation of the 16th century that fractured Western Christianity into Catholic and Protestant camps. Each branch developed its own traditions, liturgy, and relationship with the state, leaving a religious geography that still maps onto Europe today. Today, the geographic pattern remains remarkably stable, even as overall religiosity declines. Catholicism is the largest single branch, with Italy alone home to around 50 million Catholics in 2025, and Spain nearly 33 million, though the share identifying as Catholic has been steadily declining in both countries, especially among the young.

The decline of Christianity affects all three branches, but unevenly. Catholic-majority countries like Poland and Ireland have remained more religious than Protestant-majority Northern European nations, which are among the most secular in the world. Orthodox-majority countries in Eastern Europe, such as Romania and Greece, have largely retained high religiosity, partly due to the close ties between national identity and the Orthodox Church. The regional economic context is in our world GDP growth rate analysis.

Why Young Europeans Are Leaving Religion

The generational dimension of European secularisation is striking. Young Europeans are far less religious than their elders, suggesting the trend toward non-affiliation will accelerate as older, more religious generations pass on. In Czechia, an extraordinary 91% of young adults (aged 16-29) say they have no religious affiliation, the highest in Europe. Between 70% and 80% of young adults in Estonia, Sweden, and the Netherlands also categorise themselves as non-religious.

By contrast, young people in Poland (only 17% non-religious) and Lithuania (25%) remain comparatively religious, maintaining the East-West and Catholic-secular divides into the next generation. The trend among the young confirms that "Christianity as default is gone" in much of Europe - in the UK, young Muslims (6%) are on the brink of overtaking young Anglicans. This generational shift virtually guarantees continued secularisation across most of the continent. The social factors behind these generational changes connect to our social media statistics analysis.

The East-West and North-South Religious Divides

Europe's religious map is defined by two great divides. The first is East-West: Central and Eastern European nations are generally far more religious than Western European ones. In countries like Armenia, Bosnia, Georgia, Greece, and Romania, half or more of adults say religion is very important in their lives, compared with about one-in-ten in France, Germany, the UK, and several other Western European countries. This divide has deep historical roots, partly reflecting the revival of religion in former communist states after decades of state-enforced atheism.

The second divide is North-South within Western Europe: Southern European countries like Portugal, Italy, and Spain tend to be more religious than Northern European ones like Sweden, Norway, and Denmark. Portugal, where 37% of adults are highly religious, stands out as significantly more devout than its Western European neighbours, in line with Poland. These patterns reflect the enduring influence of the Catholic Church in the south versus the more secularised Protestant north.

These divides are not absolute - Czechia and Estonia, in Central/Eastern Europe, are among the most secular countries on Earth, while pockets of religiosity persist in Western Europe. But the broad pattern holds: religion remains a powerful force in the east and south, while the west and north lead the world in secularisation. The demographic and economic differences between these regions are explored in our GDP per capita by country analysis and BRICS countries analysis.

Why Europe's Religious Shift Matters

Europe's religious transformation has profound implications far beyond places of worship. Religion has historically shaped European politics, law, education, social norms, and national identity. As the continent secularises, these influences are evolving. Debates over religious symbols in public spaces, faith schools, religious holidays, and the role of churches in public life have intensified as societies become more diverse and more secular.

The rise of the unaffiliated and the growth of Islam also reshape political landscapes. Religious identity increasingly intersects with debates over immigration, integration, and national values across many European countries, becoming a flashpoint in elections and policy discussions from France to Sweden to Hungary. At the same time, the persistence of strong religiosity in Eastern and Southern Europe creates a cultural divide within the European Union, visible in differing attitudes toward social issues such as family, gender, and sexuality.

For businesses, policymakers, and researchers, understanding Europe's religious composition is essential. It affects consumer behaviour, holiday calendars, dietary markets (such as halal and kosher foods), demographic forecasting, and social policy. As Europe continues its shift toward secularism and diversity, the religious patterns documented here will keep evolving, making ongoing measurement vital. The economic implications connect to our global economy analysis, and the demographic drivers to our US population demographics analysis.

Religion in Europe - Key Statistics

Frequently Asked Questions - Religion in Europe