Christianity is the largest religion in Germany, comprising an estimated 57% of the country's population in 2017.  The two largest churches of the country are the Roman Catholic Church and the Evangelical Church in Germany (EKD), a Protestant confederation of United Protestant (Lutheran and Reformed) churches. The two churches together comprised 54% of the population in 2017, of whom 28.2% belonged to the Catholic Church and 26.1% to the Evangelical Church. In 2016, Orthodox Christianity constituted ~2% of the population and other minor Christian churches (including other Protestants, Jehovah's Witnesses, Mormons and others), formed 1-1.5%.
About 36-37% of the country's population are not affiliated with any church or religion, and a minority adhere to other religions. The second largest religion in Germany is Islam, with around 4 million adherents in 2016 (5% of the population). Smaller religious groups include Buddhism (0.2%), Judaism (0.1%), Hinduism (0.1%) and others (0.4%).
Demographics of religion in Germany vary greatly by region and age. A majority of Germans under 25 years-old claim to not believe in any religion. Non-religious people (including atheists and agnostics) represent the majority in some of Germany's major cities, including Berlin and Hamburg, and the absolute majority of 70-80% of the population in all the eastern states of what between 1949 and 1990 used to be the German Democratic Republic; by contrast, rural areas of the western states of what in the same period used to be the Federal Republic of Germany are more religious, and some are highly religious.
Ancient Germanic paganism was a polytheistic religion practised in prehistoric Germany and Scandinavia, as well as Roman territories of Germania by the 1st century AD. It had a pantheon of deities that included Donar/Thunar, Wuotan/Wodan, Frouwa/Frua, Balder/Phol/Baldag, and others shared with northern Germanic paganism.Celtic paganism and later Gallo-Roman syntheses were instead practised in western and southern parts of modern Germany, while Slavic paganism was practised in the east.
In the territories of Germany under the control of the Roman Empire (the provinces Germania Superior and Germania Inferior), early Christianity was introduced and began to flourish after the 4th century. Although pagan Roman temples existed beforehand, Christian religious structures were soon built, such as the Aula Palatina in Trier (then the capital of the Roman province Gallia Belgica), completed during the reign of Roman emperor Constantine I (306-337 AD).
During the Carolingian period, Christianity spread throughout Germany, particularly during the reign of Charlemagne (r. 800-814 AD) and his expansionary military campaigns. Religious structures built during the Carolingian period include the Palatine Chapel, Aachen, a surviving component of the Palace of Aachen built by architect Odo of Metz during the reign of Charlemagne.
Roman Catholicism was the sole established religion in the Holy Roman Empire until the advent of the Protestant Reformation changed this drastically. In the early 16th century abuses (such as selling indulgences in the Catholic Church) occasioned much discontent, and a general desire for reform emerged. In 1517 the Reformation began with the publication of Martin Luther's 95 Theses detailing 95 assertions which Luther believed showed corruption and misguidance within the Catholic Church. The Reformation demonstrated Luther's disagreement both with the way in which the higher clergy used and abused power, and with the very idea of a papacy. In 1521 the Diet of Worms outlawed Luther, but the Reformation spread rapidly. Luther translated the Bible from Latin to German, establishing the basis of the modern German language. A curious fact is that Luther spoke a dialect which had minor importance in the German language of that time. After the publication of his Bible translation, his dialect evolved into what is now standard modern German.
With the protestation of the Lutheran princes at the Imperial Diet of Speyer (1529) and rejection of the Lutheran "Augsburg Confession" at the Diet of Augsburg (1530), a separate Lutheran church emerged.
From 1545 the Counter-Reformation began in Germany. Much of its impetus came from the newly founded (in 1540) Jesuit order. It restored Catholicism to many areas, including Bavaria. The Holy Roman Empire became religiously diverse; for the most part, the states of northern and central Germany became Protestant (chiefly Lutheran, but also Calvinist/Reformed) while the states of southern Germany and the Rhineland largely remained Catholic. In 1547 the Holy Roman Emperor Charles V defeated the Schmalkaldic League, an alliance of Protestant rulers. The Peace of Augsburg in 1555 brought recognition of the Lutheran faith. But the treaty also stipulated that the religion of a state was to be that of its ruler (cuius regio, eius religio).
In 1608/1609 the Protestant Union and the Catholic League formed. The Thirty Years' War (1618-1648), one of the most destructive conflicts in European history, played out primarily in German lands, but involved most of the countries of Europe. It was to some extent a religious conflict, involving both Protestants and Catholics.
Two main developments reshaped religion in Germany after 1814. Across the land, there was a movement to unite the larger Lutheran and the smaller Reformed Protestant churches. The churches themselves brought this about in Baden, Nassau, and Bavaria. However, in Prussia King Frederick William III was determined to handle unification entirely on his own terms, without consultation. His goal was to unify the Protestant churches, and to impose a single standardised liturgy, organisation, and even architecture. The long-term goal was to have fully centralised royal control of all the Protestant churches. In a series of proclamations over several decades the Evangelical Church of the Prussian Union was formed, bringing together the more numerous Lutherans and the less numerous Reformed Protestants. The government of Prussia now had full control over church affairs, with the king himself recognised as the leading bishop. Opposition to unification came from the "Old Lutherans" in Silesia who clung tightly to the theological and liturgical forms they had followed since the days of Luther. The government attempted to crack down on them, so they went underground. Tens of thousands migrated, to South Australia and especially to the United States, where they formed the Missouri Synod which remains fundamentalist in its interpretation of the Bible, as distinguished from Lutherans who pursue a more contextualist approach. Finally, in 1845 the new king, Frederick William IV, offered a general amnesty and allowed the Old Lutherans to form a separate church association with only nominal government control.
From the religious point of view of the typical Catholic or Protestant, major changes were underway in terms of a much more personalised religiosity that focused on the individual more than the church or the ceremony. The rationalism of the late 18th century faded away, and there was a new emphasis on the psychology and feeling of the individual, especially in terms of contemplating sinfulness, redemption, and the mysteries and the revelations of Christianity. Pietistic revivals were common among Protestants. Among Catholics there was a sharp increase in popular pilgrimages. In 1844 alone, half a million pilgrims made a pilgrimage to the city of Trier in the Rhineland to view the Seamless robe of Jesus, said to be the robe that Jesus wore on the way to his crucifixion. Catholic bishops in Germany had historically been largely independent of Rome, but now the Vatican exerted increasing control, a new "ultramontanism" of Catholics highly loyal to Rome. A sharp controversy broke out in 1837-38 in the largely Catholic Rhineland over the religious education of children of mixed marriages, where the mother was Catholic and the father Protestant. The government passed laws to require that these children always be raised as Protestants, contrary to Napoleonic law that had previously prevailed and allowed the parents to make the decision. It put the Catholic Archbishop under house arrest. In 1840, the new King Frederick William IV sought reconciliation and ended the controversy by agreeing to most of the Catholic demands. However Catholic memories remained deep and led to a sense that Catholics always needed to stick together in the face of an untrustworthy government.
Chancellor Otto von Bismarck would not tolerate any base of power outside Germany - in Rome - having a say in German affairs. He launched a Kulturkampf ("culture war") against the power of the pope and the Catholic Church in 1873, but only in Prussia. This gained strong support from German liberals, who saw the Catholic Church as the bastion of reaction and their greatest enemy. The Catholic element, in turn, saw the National Liberals, who often happened to be Protestant, as its worst enemy and formed the Center Party.
Catholics, although about a third of the national population, were seldom allowed to hold major positions in the Imperial government or the Prussian government. After 1871, there was a systematic purge of Catholics; in the powerful interior ministry, which handled all police affairs, the only Catholic was a messenger boy. Jews were likewise heavily discriminated against.
Most of the Kulturkampf was fought out in Prussia, but Imperial Germany passed the Pulpit Law which made it a crime for any cleric to discuss public issues in a way that displeased the government. Nearly all Catholic bishops, clergy, and laymen rejected the legality of the new laws, and were defiant facing the increasingly heavy penalties and imprisonments imposed by Bismarck's government. Historian Anthony Steinhoff reports the casualty totals:
As of 1878, only three of eight Prussian dioceses still had bishops, some 1,125 of 4,600 parishes were vacant, and nearly 1,800 priests ended up in jail or in exile. ...Finally, between 1872 and 1878, numerous Catholic newspapers were confiscated, Catholic associations and assemblies were dissolved, and Catholic civil servants were dismissed merely on the pretence of having Ultramontane sympathies.
The German Bishops who were politically powerless in Germany and theologically in opposition to the Pope in Rome - have now become powerful political leaders in Germany and enthusiastic defenders of the now infallible Faith of Rome, united, disciplined, and thirsting for martyrdom, thanks to Bismarck's uncalled for antiliberal declaration of War on the freedom they had hitherto peacefully enjoyed.
Bismarck underestimated the resolve of the Catholic Church and did not foresee the extremes that this struggle would entail. The Catholic Church denounced the harsh new laws as anti-catholic and mustered the support of its rank and file voters across Germany. In the following elections, the Center Party won a quarter of the seats in the Imperial Diet. The conflict ended after 1879 because Pius IX died in 1878 and Bismarck broke with the Liberals to put his main emphasis on tariffs, foreign policy, and attacking socialists. Bismarck negotiated with the conciliatory new pope Leo XIII. Peace was restored, the bishops returned, and the jailed clerics were released. Laws were toned down or taken back (Mitigation Laws 1880-1883 and Peace Laws 1886/87), but the main regulations such as the Pulpit Law and the laws concerning education, civil registry (incl. marriage), or religious disaffiliation remained in place. The Center Party gained strength and became an ally of Bismarck, especially when he attacked socialism.
The national constitution of 1919 determined that the newly formed Weimar Republic had no state church, and guaranteed freedom of faith and religion. Earlier, these freedoms were mentioned only in state constitutions. Protestants and Catholics were equal before the law, and freethought flourished. The German Freethinkers League attained about 500,000 members, many of whom were atheists, before the organisation was shut down by the Nazis in May 1933.
When Adolf Hitler's Nazi Party seized power in January 1933, it sought to assert state control over the churches, on the one hand through the Reichskonkordat with the Catholic Church, and the forced merger of the German Evangelical Church Confederation into the Protestant Reich Church on the other. The concept of Positive Christianity and the Deutsche Christen movement sought to reconcile tenets of National Socialism with the Christian religion. This policy seems to have gone relatively well until late 1936, when a "gradual worsening of relations" between the Nazi Party and the churches saw the rise of Kirchenaustritt ("leaving the church"). Although there was no top-down official directive to revoke church membership, some Nazi Party members started doing so voluntarily and put other members under pressure to follow their example. Those who left the churches were designated as Gottgläubig: they believed in a higher power, often a creator-God with a special interest in the German nation, but did not belong to any church, nor were they atheists. Many were Germanic neopagans. This movement, especially promoted by Reichsführer-SS Heinrich Himmler, remained relatively small and by 1939, 3.5% of Germans identified as Gottgläubig; the overwhelming majority of 94.5% remained Protestant or Catholic, and only 1.5% did not profess any faith. Since January 1933, Jews in Germany were increasingly marginalised, expelled and persecuted for a combination of religious, racial and economic reasons. From 1941 to the fall of Nazi Germany in 1945, they were actively massacred during the Holocaust.
After World War II, Germany was split in two states by the Western Allies, who formed West Germany, and the Soviets, who established East Germany. The former, the Federal Republic of Germany, adopted a constitution in 1949 which states that no one may be discriminated against due to their faith or religious opinions, and that no state church exists in Germany; consequently, secularisation in West Germany proceeded slowly. The latter, the German Democratic Republic, had a communist system which actively tried to reduce the influence of religion in society; Christian churches were restricted by the government. In the 21st century, eastern German states including the capital East Berlin are less religious than western German states.
Religious communities that are of sufficient size and stability and are loyal to the constitution can be recognised as Körperschaften öffentlichen Rechtes (statutory corporations). This gives them certain privileges, for example being able to give religious instruction in state schools (as enshrined in the German constitution, though some states are exempt from this) and having membership fees collected (for a fee) by the German revenue department as "church tax": a surcharge of between 8 and 9% of the income tax. The status mainly applies to the Roman Catholic Church, the mainline Evangelical Church in Germany, a number of free churches, and Jewish communities. There has been much discussion about allowing other religious groups like Muslims into this system as well.
In 2018, representatives from Lower Saxony, Schleswig-Holstein, Hamburg and Bremen have concluded a decision has to be made by their state parliaments on whether to make Reformation Day a permanent official holiday. This initiative began after an all-German 500th Reformation anniversary in 2017 and also due to the fact that the northern German states have significantly fewer holidays than the southern ones. In 2018, Hamburg, Schleswig-Holstein, Bremen and Lower Saxony adopted resolutions making it an official holiday.
Nowadays, Protestantism is concentrated in the north and east and Catholicism is concentrated in the south and west, while unaffiliated people are concentrated in the east, where they make up the majority of the population, and are significant in the west of the country, mainly in metropolitan areas. The Catholic state of Bavaria gave the Roman Catholic Church a pope, Benedict XVI (2005-2013). With the decline of Christianity in the late 20th and early 21st century, accentuated in the east by the official atheism of the former German Democratic Republic, which has been sharper for Protestantism, the northeastern states of Germany are now mostly not religious (70%), with much of the people living there being agnostics and atheists.
Immigrations in the late 20th and early 21st century have brought new religions into Germany, including Orthodox Christianity and Islam. Orthodox Christianity is practised among immigrated Greeks, Serbs, Russians, Romanians and other communities. Most Muslims are Sunnis and Alevis of Turkish origin, but there are a small number of Shi'a Muslims and other currents. Moreover, Germany has Europe's third-largest Jewish population (after France and the United Kingdom).
German major religious bodies publish yearly updated records of their membership. According to these, Christianity is the largest religious group in Germany, with around 48 million adherents (~58.5%) in 2016 of whom 23.6 million are Catholics (28.6%) and 21.9 million are Protestants (26.6%). Orthodox Christianity has 1.5 to 2.0 million members or ~2% of the population. Other minor Christian religions counted together have approximately 1.3 million members, forming 1-1.5% of the total population.
The second largest religious group in Germany is Islam with around 4 million adherents, forming ~5% of the population in 2016. Demographers estimate that in Germany there are around 100,000 religious Jews (Judaism), and a further 90.000 ethnic Jews with no religion, around 100,000 Yazidis, 130,000 Hindus, and 270,000 Buddhists.
The latest census in 2011 found that Christianity was the religion of 51,865,590 people or 64.2% of the total population, among whom 24,869,380 or 31.2% were Catholics, 24,552,110 or 30.8% were Protestants of the Evangelical Church in Germany, 714,360 or 0.9% were members of Protestant free churches, and 1,050,740 or 1.3% were members of Eastern Orthodox and Oriental Orthodox churches. Jews were 83,430 people or 0.1%, and 2,116,460 or 2.7% were members of other religions. The remaining 26,265,880 people, or 33.0% of the total German population, were not believers in or not members of any religion (including atheists, agnostics and believers in unrecognised religions).
In 2016, the survey Politbarometer provided data regarding religion in each of the states of Germany for adults who are entitled to vote (18+), as reported in the table below. Christianity is the dominant religion of Western Germany, excluding Hamburg, which has a non-religious plurality. Irreligion is predominant in Eastern Germany, which was the least religious region amongst 30 countries surveyed in a study in 2012.
|Religion by state, 2016||Protestants||Catholics||Not religious||Muslims||Others|
|former East Berlin||14.3%||7.5%||74.3%||1.5%||2.4%|
|former West Berlin||32.0%||12.4%||43.5%||8.5%||3.5%|
At its foundation in 1871, the German Empire was about two-thirds Protestant incurring a significant drop to 26.6% in 2016 in nowadays Germany. In 1871 one-third of the population was Roman Catholic slightly reducing to 28.6% by 2016 . In 1871 there was also a notable Jewish minority which was largely exterminated during the holocaust. Other faiths existed in the state, but never achieved the demographic significance and cultural impact of these three confessions.
As of 2016, Christianity with around 48 million members is the largest religion in Germany (~58.5% of the population)  Consequently, a majority of the German people belong to a Christian community, although many of them take no active part in church life. About 2% of the population is Orthodox Christian and about 1-1.5% follows other forms of Christianity (including other Protestantisms, Jehovah's Witnesses, Mormonism and others).
Source for all data: REMID
As of 2016 about 35-36% of the Germans are irreligious. Before World War II, about two-thirds of the German population was Protestant and one-third was Roman Catholic. In the north and northeast of Germany especially, Protestants dominated. In the former West Germany between 1945 and 1990, which contained nearly all of Germany's historically Catholic areas, Catholics have had a small majority since the 1980s. Due to a generation behind the Iron Curtain, Protestant areas of the former states of Prussia were much more affected by secularism than predominantly Catholic areas. The predominantly secularised states, such as Hamburg or the East German states, used to be Lutheran or United Protestant strongholds. Because of this, Protestantism is now strongest in two strips of territory in the former West Germany, one extending from the Danish border to Hesse, and the other extending northeast-southwest across southern Germany.
There is a non-religious majority in Hamburg, Berlin, Brandenburg, Saxony, Saxony-Anhalt, Thuringia, and Mecklenburg-Vorpommern. In the eastern state of Saxony-Anhalt only 19.7 percent belong to the two big denominations of the country. This is the state where Martin Luther was born and lived most of his life.
In what used to be East Germany both religious observance and affiliation are much lower than in the rest of the country, after forty years of Communist rule. The government of the German Democratic Republic encouraged a state atheist worldview through institutions such as Jugendweihen (youth consecrations) -- secular coming-of-age ceremonies akin to Christian confirmation which all young people were encouraged to attend. The number of christenings, religious weddings, and funerals is also lower than in the West.
According to a survey among German youths (aged 12 to 24) in the year 2006, most German youths are non-religious (51%). 30% of German youths stated belief in a personal god, 19% believe in some kind of supernatural power, 23% share agnostic views and 28% are atheists.
Islam is the largest non-Christian religion in the country. There are between 4 and 4.7 million Muslims, around 5% of the population. The majority of Muslims in Germany are of Turkish origin, followed by those from Pakistan, countries of the former Yugoslavia, Arab countries, Iran, and Afghanistan. This figure includes the different denominations of Islam, such as Sunni, Shia, Ahmadi, and Alevi. Muslims first came to Germany as part of the diplomatic, military, and economic relations between Germany and the Ottoman Empire in the 18th century.
Jewish communities in German speaking regions go back to the 4th century. In 1910, about 600,000 Jews lived in Germany. After Adolf Hitler assumed power in 1933, he began systematically imprisoning and executing Jews in Germany and throughout Nazi occupied Europe. By the end of World War 2, around 6 million Jews had been killed by the Nazi government.
About ninety thousand Jews from the former Eastern Bloc, mostly from ex-Soviet Union countries, settled in Germany since the fall of the Berlin Wall. This is mainly due to a German government policy which effectively grants an immigration opportunity to anyone from the Commonwealth of Independent States and the Baltic states with Jewish heritage, and the fact that today's Germans are seen as more significantly accepting of Jews than many people in the ex-Soviet realm.
Most of them are followers of the Buddhist school of Theravada especially from Sri Lanka. Furthermore, there are followers of Vajrayana, also referred to as Tibetan Buddhism as well as followers of Nichiren Buddhism mainly from Japan and Zen Buddhism from Japan, as well. Around 59,000 Buddhists are from Thailand who follow the school of Theravada and keep 48 temples in Germany and form one of the largest Buddhist community of Buddhists of Asian origin in Germany. Most of the different Buddhist schools and organisation in Germany are members of the non-profit association Deutschen Buddhistischen Union e.V. (DBU).
There are approximately 100,000 Hindus living in Germany. Most of them are Tamil Hindus from Sri Lanka (around 42,000 to 45,000); from India are around 35,000 to 40,000; of German or European origin are around 7,500 and around 5,000 Hindus are originally from Afghanistan. There are also Hindus from Nepal in Germany however this number is very low.
In addition, there are Hindus in Germany who are followers of so-called New religious movements or youth sects such as Hare Krishna movement or Transcendental Meditation. These comparatively new religious organisations are considered as neo-Hinduism in the West. The total number of these followers in Germany is comparatively low.
Between 10,000 and 20,000 Sikhs are living in Germany. Many Sikhs in Germany have their roots from Punjab region in the north of India, as well as from Pakistan and Afghanistan. Germany has the third highest Sikh population in Europe after United Kingdom and Italy. The city Frankfurt is also known to the Sikhs, as Mini Punjab, because of a great Sikh Population, residing there.
Neopagan religions have been public in Germany at least since the 19th century. Nowadays Germanic Heathenism (Germanisches Heidentum, or Deutschglaube for its peculiar German forms) has many organisations in the country, including the Germanische Glaubens-Gemeinschaft (Communion of Germanic Faith), the Heidnische Gemeinschaft (Heathen Communion), the Verein für germanisches Heidentum (Association for Germanic Heathenry), the Nornirs Ætt, the Eldaring, the Artgemeinschaft, the Armanen-Orden, and Thuringian Firne Sitte.
Other Pagan religions include the Celto-Germanic Matronenkult grassroots worship practiced in Rhineland, Celtoi (a Celtic religious association), and Wiccan groups. As of 2006, 1% of the population of North Rhine-Westphalia adheres to new religions or esoteric groups.
The German government provides information and warnings about cults, sects, and new religious movements. In 1997, the parliament set up a commission for Sogenannte Sekten und Psychogruppen (literally "so-called sects and psychic groups"), which in 1998 delivered an extensive report on the situation in Germany regarding NRMs. In 2002, the Federal Constitutional Court upheld the governmental right to provide critical information on religious organisations being referred to as Sekte, but stated that "defamatory, discriminating, or falsifying accounts" were illegal.
Every Protestant Landeskirche (church whose canonical jurisdiction extends over one or several states, or Länder) and Catholic episcopacy has a Sektenbeauftragter (Sekten delegate) from whom information about religious movements may be obtained.
[...] it was not primarily a religious war. [...] Religion certainly provided a powerful focus for identity, but it had to compete with political, social, linguistic, gender and other distinctions. most contemporary observers spoke of imperial, Bavarian, Swedish, or Bohemian troops, not Catholic or Protestant, which are anachronistic labels used for convenience since the nineteenth century to simplify accounts. The war was religious only to the extent that faith guided all early modern public policy and private behaviour.