
Austria-Hungary had an extremely diverse state structure, with all the major monotheistic religions represented in the empire. The ethno-linguistic composition of Austria-Hungary was varied, with many speaking Hungarian as their native language, while others stated German as their Umgangssprache. The country had a long history of religious diversity, with the Catholic Church, Protestants, Orthodox Christians, Jews, and Muslims all present in the country. While the Catholic Church was the most dominant religious group, with 79% of the population identifying as Catholic in the 1910 census, there were also significant numbers of Protestants and Orthodox Christians.
Characteristics and Values of Christianity in Austria-Hungary
| Characteristics | Values |
|---|---|
| Percentage of Christians in Austria-Hungary | 68.2% (2021) |
| Percentage of Catholics in Austria-Hungary | 79% (1910) |
| Percentage of Catholics in Austria | 87.4% (1971), 55.2% (2021) |
| Percentage of Catholics in Hungary | 49% (1910) |
| Percentage of Protestants in Austria | 6% (1971), 3.8% (2021) |
| Percentage of Orthodox Christians in Austria | 2.2% (2001), 4.9% (2021) |
| Historical Religious Influence | Counter-Reformation, Protestantism, Lutheranism |
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What You'll Learn

Catholicism was dominant in Austria-Hungary
Austria-Hungary was predominantly Catholic, with the Roman Catholic Church forming the most significant religious community in the empire. The empire was highly diverse in its state structure, and the Habsburg monarchy, which ruled from 1273 to 1918, strongly promoted Roman Catholicism. While the empire was multi-confessional, with a presence of Protestants, Orthodox Christians, Jews, and Muslims, the Catholic Church held a dominant position and was closely connected to the Habsburg ruling house.
The dominance of Catholicism in Austria-Hungary can be traced back to the Counter-Reformation in the 16th and 17th centuries. During this period, the Habsburg monarchy imposed a strict regime to restore the influence of the Catholic Church among its subjects. The Habsburgs viewed themselves as the champions of Catholicism and worked to suppress other religious confessions and religions. This campaign was largely successful, and the influence of the Catholic Church became deeply entrenched in the empire.
In the Austrian half of the empire, the dominance of Catholicism was even more pronounced. According to the 1910 census, 79% of the inhabitants of the western half of the Danube Monarchy were Catholic, with an even higher proportion in the Alpine regions. Additionally, 3.5 million people (12% of the population) in the Austrian half belonged to the Greek Catholic Church, which was united with Rome and played a bridging role with the Orthodox Eastern Churches.
However, it is important to note that there were regional variations within the empire. While Catholicism dominated in the western crown lands, its influence was weaker in the southeast, where Orthodox Churches played a more significant role. In the Austrian half, Orthodox Churches had 770,000 members (2.3% of the population), mainly in Dalmatia and Bukovina. Additionally, there were 800,000 believers in Bosnia and Herzegovina.
Despite the overall dominance of Catholicism, there were pockets of resistance to the Counter-Reformation. In some parts of the empire, Protestantism survived, particularly in certain Alpine regions and Bohemian territories. The Evangelical Church of Augsburg Confession, for example, had a significant following in Hungary, with 1.3 million members (6% of the population).
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The region was religiously diverse
Austria-Hungary had an extremely diverse state structure. At the start of World War I, it was a major power in decline, facing social and political problems and nationality conflicts that shook the empire to its core. Despite this, the Monarchy represented an enormous cultural region in which the Habsburg empire flourished.
The Habsburg Monarchy was religiously diverse, with all major monotheistic religions represented. The Roman Catholic Church was the most important religious community in the Habsburg Monarchy, with 22.5 million Catholics in Cisleithania (79% of the population) and 10.5 million in Hungary (49%) in 1910. The Greek Catholic Churches, united with Rome, also played a significant role, with 3.5 million members (12%) in the Austrian half and 1.9 million (9%) in the Hungarian half. The dominance of Catholicism was weaker in the southeast, where Christian Orthodox Churches were influential, with 770,000 members (2.3%) in the Austrian half and 800,000 in Bosnia and Herzegovina.
Protestantism also had a significant presence in the region, particularly among the Germans and Slovaks, where it was an important component of their cultural identity. The Evangelical Church of Augsburg Confession had 1.3 million members in Hungary (6% of the population). In the Austrian half of the empire, Protestantism survived the Catholic Counter-Reformation in some pockets and underground. It was not until the Edict of Tolerance proclaimed by Emperor Joseph II in 1781 that official Protestant church structures could form, mainly in Alpine regions and Bohemian territories.
In addition to Christians, Jews made up around 5% of the population in Hungary, contributing significantly to economic and intellectual life, particularly in cities. Muslims were also present in the border areas of Galicia, Transylvania, Bosnia, and Herzegovina, and a film from 1910 shows groups of Christian and Muslim children paying tribute to the aged monarch.
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Protestantism was suppressed
The Austrian branch of the Habsburgs, who ruled from 1558, were staunch supporters of Catholicism and suppressed all other religions. They imposed a strict regime to restore the influence of the Catholic Church among Austrians. This campaign was successful, and the Habsburgs viewed themselves as the vanguard of Catholicism.
In the 16th century, many Austrians converted to Protestantism, especially Lutheranism, as the Protestant Reformation spread across Europe. In 1545, almost half of the Austrian population had converted to Lutheranism, and a smaller minority endorsed Calvinism. However, after 1545, Austria was recatholicized in the Counter Reformation. The Habsburgs' counteractivity included dismissing all Protestants from court service and using Jesuits in Vienna, Graz, and Innsbruck.
In Upper Austria, where Protestants had their strongest hold, the situation remained undecided, with the Catholic governor Hans Jakob Löbl of Greinburg and the Calvinist Georg Erasmus of Tschernembl leading the opposing religious parties. When the future emperor Ferdinand II, the ruler of Inner Austria, took over in Steiermark, he became the most resolute advocate of the Counter-Reformation. He succeeded in uprooting Protestantism in Inner Austria and then in the other Habsburg countries, except Hungary and Silesia.
In the 17th century, the persecution of Hungarian Protestants by the Habsburgs led to responses in the Dutch Republic, England, and France. This included the trial and imprisonment of Protestant clergy after 1674, and their liberation in 1676, thanks to Dutch intervention.
In 1781, Emperor Joseph II issued a Patent of Tolerance for Austria, allowing other confessions limited freedom of worship. Religious freedom was later declared a constitutional right in Cisleithania after the Austro-Hungarian Ausgleich in 1867.
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Orthodox Christianity was influential
Austria-Hungary had an extremely diverse state structure. The monarchy represented an enormous cultural region in which the Habsburg empire flourished despite the political stagnation. The ethno-linguistic composition of Austria-Hungary was varied, with many different languages spoken across the empire.
In terms of religion, the Habsburg Monarchy was multi-confessional. The Roman Catholic Church was the most important religious community in the Habsburg Monarchy, with 22.5 million Catholics in Cisleithania (79% of the population) and 10.5 million in Hungary (49%) in 1910. However, there were also significant numbers of Protestants, Orthodox Christians, Jews, and Muslims. In the Austrian half of the empire, 12% of the population belonged to the Greek Catholic Church, while 9% did so in the Hungarian half. In the Austrian half, Orthodox Churches had 770,000 members (2.3%), concentrated in Dalmatia and Bukovina.
Despite the dominance of Catholicism, there were considerable regional variations. While more than 90% of the population in the western crown lands were Catholic, this influence was much weaker in the southeast, where Christian Orthodox Churches played an important role. The Greek Catholic Churches, united with Rome, were especially significant in the Habsburg Monarchy, forming a bridge with the Orthodox Eastern Churches. This influence can be traced back to efforts by Catholic-dominated states like Poland and the Habsburg Monarchy itself, which had large groups of Orthodox Christians.
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Religious freedom was eventually granted
Austria-Hungary had an extremely diverse state structure. The ethno-linguistic composition of Austria-Hungary, according to the census of 31 December 1910, was as follows: In the Austrian Empire (Cisleithania), the census of 1911 recorded Umgangssprache, the everyday language. In the Kingdom of Hungary (Transleithania), the 1910 census was based on mother tongue.
The Austrian half of the empire was predominantly Catholic, with 3.5 million people (12% of the population) belonging to the Greek Catholic Church. In the Hungarian half, there were 1.9 million (9%) members of the Greek Catholic Church. Overall, 91% of the population in the Austrian half and around 60% in the Hungarian half recognized the Pope as their religious leader. However, there were considerable regional variations, with Christian Orthodox Churches playing a significant role in the southeast.
The Habsburg Monarchy, which ruled Austria-Hungary, was multi-confessional. While the Roman Catholic Church was the most important religious community, other religions were also present, including Protestants, Orthodox Christians, Jews, and Muslims. The dominance of the Catholic Church can be attributed to the Habsburgs' efforts to restore Catholicism and suppress other confessions during the Counter-Reformation.
Today, Austria's population is still predominantly Christian, with 68.2% of the country identifying as Christian according to a 2021 national survey. However, this represents a decline from 93.8% in 1971. Within Christianity, the majority are Catholics (80.9%), followed by Orthodox Christians (7.2%), and Protestants (5.6%). The decline in Christianity has been accompanied by a rise in other religions, such as Islam, and an increase in those who do not identify with any religion.
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Frequently asked questions
In 1910, 79% of the inhabitants of the western half of the Danube Monarchy, or Austria-Hungary, were Catholic. In the Austrian half of the empire, 91% of the population recognized the Pope as their religious leader, while in the Hungarian half, this figure was around 60%.
The Austro-Hungarian Monarchy had a diversity of religions, and the Emperor’s subjects included Catholics, Protestants, Orthodox Christians, Jews, and Muslims.
Catholicism was the primary religion in Austria-Hungary. The Roman Catholic Church was the most important religious community in the Habsburg Monarchy.
Following the fall of the Habsburg Monarchy after WWI and the transformation of Austria into a federal republic, there was a general decline in Christianity (excluding Orthodox churches) and a rise in other religions.











































