
Ireland has historically been a Catholic country, with the Catholic Church playing a significant role in shaping social norms, influencing marriage, education, and morality. However, in recent years, there has been a notable shift towards secularism, particularly among the younger generations. According to the 2022 census, 69.1% of the population identified as Catholic, a decrease from previous years. While Catholicism remains the predominant religion in Ireland, the number of people identifying with no religion has significantly increased, with 14% of Irish residents ticking this option in the latest census. This trend towards secularism is reflected in the decline in Mass attendance, with weekly attendance rates dropping from 91% in the 1970s to 27% in 2020.
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What You'll Learn

Catholicism remains the most popular religion in Ireland
Historically, Ireland was a centre of Celtic Christianity during the Middle Ages, aligned with the Roman Catholic Church. Irish Catholics resisted the imposition of Protestantism during the English Reformation in the 16th century, leading to centuries of religious and political conflict. The Penal Laws enacted under British rule restricted the rights of Irish Catholics, prohibiting land ownership, public office, voting, and open religious practice. Despite persecution, Irish Catholics preserved their faith through clandestine practices and secret Masses.
In the 1937 Constitution of Ireland, the Catholic Church was given a "special position" as the majority religion. However, the country underwent a period of legal secularisation in the late 20th century, and the Constitution was amended to remove references to specific religious groups and guarantee freedom of religion.
While Catholicism is still prevalent in Ireland, the country is becoming more secular, especially among younger generations. The number of people identifying with "no religion" has increased significantly, with 14% of Irish residents selecting this option in the 2022 census, up from 9.8% in 2011. The rise of secularism and declining religious affiliation have impacted the religious landscape of contemporary Ireland.
Despite the overall decline in Catholicism, Ireland still has one of the highest rates of regular Mass attendance in Europe. Weekly Mass attendance varies across different regions, with Dublin reporting an average of 18% participation in 2011. The Association of Catholic Priests found a higher rate of 35% weekly mass attendance on an all-island basis in 2012. While daily Mass attendance was once common, it has decreased significantly, with a reduction from 85% to 48% between 1990 and 2006.
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The number of Irish Catholics is declining
Ireland has historically been a Catholic country, with the Catholic Church playing a significant role in shaping the country's social norms, including marriage, education, and morality. However, in recent years, there has been a noticeable decline in the number of Irish people who identify as Catholic. This trend is particularly prominent among the younger generations, indicating a shift towards secularism in Irish society.
According to the 2022 census, 69.1% of the Irish population, or 3.5 million people, identified as Catholic. This represents a decrease from the previous census in 2016, when 78.3% of the population identified as Catholic. The decline in the number of Irish Catholics is evident in the decreasing attendance rates at Mass. While daily Mass attendance was at 13% in 2006, weekly attendance had dropped from 85% in 1990 to 48% in 2006. By 2020, weekly Mass attendance in Ireland was at 27%, still one of the highest rates in Europe but a significant decline from previous decades.
Several factors have contributed to the decline in Irish Catholicism. One factor is the increasing secularisation of Irish society, particularly among the younger generations. More people are identifying with "no religion" in recent years, with 14% of Irish residents ticking the "no religion" box on the 2022 census form, up from 9.8% in 2011. This trend is also reflected in the decrease in religious studies in schools, with secular groups working to eliminate the mandatory preparation for Catholic sacraments in Catholic schools.
Another factor contributing to the decline in Irish Catholicism is the changing religious landscape in Ireland. While Catholicism remains the largest denomination, other religious groups are growing. For example, the Eastern Orthodox Church is the second-largest Christian denomination in Ireland, with 2.1% of the population identifying as Orthodox Christians. Additionally, there has been a significant increase in the number of Hindus, Muslims, and members of other religious groups.
The decline in Irish Catholicism is also influenced by historical and cultural factors. The Catholic Church in Ireland has faced periods of persecution and conflict, particularly under British rule, which may have contributed to a shift away from the Church over time. Additionally, the Church has faced scrutiny and criticism in recent years, with a focus on issues such as clerical abuse and the Church's role in societal changes.
In conclusion, while Catholicism remains the predominant religion in Ireland, there is a clear decline in the number of Irish people who identify as Catholic. This decline is driven by a variety of factors, including secularisation, changing religious landscapes, and historical and cultural influences. The trend towards secularism, particularly among younger generations, suggests that the number of Irish Catholics may continue to decrease in the future.
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Ireland is becoming more secular
As of 2021, approximately 78.3% of the Irish population identifies as Catholic, according to the Central Statistics Office. While this still represents a significant majority, the number has been steadily declining in recent decades, indicating a shift towards secularism in Ireland. This trend is reflected in the decreasing attendance at religious services and an increasing diversity of religious beliefs and practices in the country.
Ireland has a long history of religious homogeneity, with Catholicism playing a dominant role in shaping the country's culture, politics, and social norms. However, in recent times, there has been a noticeable move away from traditional religious practices and institutions. This can be attributed to various factors, including changing social values, increasing urbanization, and a more diverse and globalized society.
One significant indicator of Ireland's move towards secularism is the decline in church attendance. While in the past, mass attendance was a regular and expected part of Irish cultural life, today, fewer people are participating in religious services. This is particularly noticeable among younger generations, who tend to be less affiliated with organized religion than their elders. A 2019 survey found that only about one-third of Irish people under the age of 25 attended religious services once a week or more.
In addition to declining church attendance, Ireland's secularization is also evident in changing social attitudes and values. There is a growing acceptance of alternative lifestyles and beliefs, with an increasing number of people identifying as atheist, agnostic, or spiritual but not religious. Same-sex marriage, for example, was legalized in Ireland in 2015 after a popular referendum, demonstrating a shift towards more liberal and secular values.
The influence of the Catholic Church in areas such as education and healthcare has also diminished. While the Church still plays a role in these sectors, there is a growing trend towards secularization, with increasing diversity and choice in education and a more secular approach to healthcare. Furthermore, the Irish government has actively promoted a separation of church and state, with the removal of references to Ireland's 'special relationship' with the Catholic Church in diplomatic postings and a more inclusive approach to religious representation in state ceremonies.
In conclusion, while Ireland has a strong historical connection with Catholicism, the country is undoubtedly moving towards a more secular society. This is evident in the declining numbers of religious adherents, decreasing church attendance, and shifting social values and attitudes. While Catholicism will likely continue to play a role in shaping Irish culture and identity, the influence of religion in public life is expected to continue to wane in the coming years.
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Catholicism has historically been tied to Irish nationalism
The predominant religion in the Republic of Ireland is Christianity, with the Catholic Church being the largest denomination. In the 2022 census, 69.1% of the population, or 3.5 million people, identified as Catholic. This marks a decline from the 2016 census, when 79% of the population identified as Catholic.
The resistance to British imperialism and the efforts to establish an autonomous Irish Parliament with a Catholic majority further solidified the link between Catholicism and Irish nationalism. The Irish Catholic movements of the 16th century, led by a small landed and clerical elite, advocated for the restoration of confiscated Catholic land and the representation of the "Irish nation." The Jacobites, for instance, fought in the Williamite War in Ireland from 1689 to 1691, but ultimately suffered defeat. Despite this, the coupling of religious and ethnic identity, primarily Catholic and Gaelic, became enduring features of Irish nationalism.
The Irish population's identification with Catholicism and their resistance to the establishment of a national Church of Ireland corresponding to the Church in England further strengthened the connection between Catholicism and Irish nationalism. The persistence of Catholic religious beliefs and practices became a symbol of Irish identity and a means of political resistance to British imperial policies. As a result, Irish Catholicism emerged stronger and more intertwined with national identity, as observed by Luke Gibbons in "Transformations in Irish Culture."
While Ireland has become more secular, particularly among younger generations, Catholicism continues to hold cultural and historical significance in the context of Irish nationalism.
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The Catholic Church has influenced social norms in Ireland
The Catholic Church has had a significant influence on social norms in Ireland, particularly in the period following Irish independence in 1922. During this time, the Catholic Church came to play an increasingly prominent role in the social and political landscape of the country.
The Irish Constitution of 1937, while guaranteeing religious freedom, acknowledged the “special position" of the Catholic Church as the majority religion in the country. This recognition granted the Church a degree of influence over social policies and norms. For example, the Constitution's "directive principles of social policy" drew heavily from Catholic teachings, influencing areas such as marriage, family, and morality. From 1937 until 1995, divorce and remarriage were prohibited in Ireland, reflecting Catholic views on marriage. Additionally, the Church's stance on issues such as pornography, abortion, and contraception influenced social norms and legal policies. The Health (Family Planning) Act of 1979, for instance, was a compromise influenced by the Catholic Church, allowing contraception to be obtained only with a prescription.
The Catholic Church also had a significant presence in the education and healthcare sectors in Ireland. Many schools were run by religious organizations, and the Church influenced the curriculum, particularly in the study of religion. In the healthcare sector, the Church managed and staffed many hospitals and healthcare institutions, often with government funding.
However, in recent decades, Ireland has experienced a trend of increasing secularism, particularly among younger generations. The number of people identifying as Catholic has declined, while the number of those with "no religion" has risen significantly. This shift has been accompanied by changing social norms and a move away from traditional conservatism. For example, in 2015, Ireland became the first country to approve same-sex marriage by popular vote, reflecting a shift towards progressive values. While the Catholic Church once held a dominant position in Irish society, its influence has gradually diminished, giving way to a more diverse and secular social landscape.
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Frequently asked questions
In the 2022 census, 69.1% of the population identified as Catholic, down from 79% in 2016.
In 2022, 3.5 million people identified as Catholic, down from 3.7 million in 2016.
In 2022, 14% of the population identified as having "no religion", up from 9.8% in 2011. This equates to 736,210 people in 2022 and 551,941 people in 2011.
Yes, the percentage of Irish residents who identify as Catholic has been falling over time. In 2016, it was reported that 78.3% of the population were Catholic, down from 84.2% in 2011.









































