
The United Kingdom has a long and complex religious history, with a variety of Christian denominations and other faiths co-existing within its borders. While the country has historically been associated with Anglicanism and Protestantism, particularly following the English Reformation, it has also been influenced by Catholicism and other religious movements. Today, the UK is becoming increasingly secular, with a decline in church attendance across all Christian denominations. However, recent census data from Northern Ireland reveals a shift, with Catholics now outnumbering Protestants for the first time in the region's history. This development has sparked discussions around inclusivity, diversity, and the potential for constitutional change.
| Characteristics | Values |
|---|---|
| Most widely practiced branch of Christianity in the UK | Protestantism |
| Dominant form of Western Christianity in Britain during the Middle Ages | Catholic Church |
| Percentage of population that is Catholic | 45.7% in Northern Ireland, 13% in the UK (as per May 2019 Special Eurobarometer) |
| Percentage of population that is Protestant | 43.5% in Northern Ireland, 14% in the UK (as per May 2019 Special Eurobarometer) |
| Country with the highest concentration of Catholics in the UK | Northern Ireland |
| Religious affiliation of the British monarch | Protestant |
| Church with the most members in the UK | Church of England |
| Percentage of people in England with no religion | 15% (as per the 2001 census) |
| Percentage of people in Northern Ireland with no religion | 47.32% (as per the 2008 European Social Survey) |
| Percentage of people aged 65+ attending church | 26% |
| Percentage of people aged 16-44 attending church | 11% |
| Percentage of people in the UK who are Christian | 50% (as per May 2019 Special Eurobarometer) |
| Percentage of people in the UK who are atheist | 37% (as per May 2019 Special Eurobarometer) |
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What You'll Learn

The UK's religious landscape
The United Kingdom's religious landscape has been historically dominated by Christianity, with the Catholic Church being the dominant form of Western Christianity in the country during the Middle Ages. However, as a result of the Reformation, Protestantism became the most widely practised branch of Christianity in the modern UK.
The English Reformation, which began in the 16th century, saw the establishment of the Church of England as an independent church separate from the Roman Catholic Church. This was driven by a desire to break free from papal influence and the excesses of the Catholic Inquisition. Henry VIII's dissolution of the monasteries faced little resistance, and the Church of England became the established church in England and Wales. The Scottish Reformation, led by John Knox in 1560, also resulted in a deep movement away from Catholicism towards Presbyterianism.
Despite this historical shift towards Protestantism, the UK has become increasingly secular in recent times, with a steady decline in church membership and attendance across all Christian denominations. According to the 2011 census, 48.4% of the population identified with a Protestant or other Christian background, while 45.1% were Catholic or raised Catholic. However, the 2021 census showed that the percentage of the population raised as Catholic had overtaken those raised as Protestant for the first time, with 45.7% identifying as Catholic and 43.5% as Protestant in Northern Ireland. This shift has been attributed to a growing number of people identifying as having 'no religion' or having arrived from non-Christian countries.
In terms of religious diversity, the UK also has significant minority populations adhering to other faiths. These include Islam, Hinduism, Judaism, Buddhism, and Sikhism. Additionally, there are smaller communities practising Modern Paganism, the Baháʼí Faith, and the Rastafari movement, which had around 5000 followers in the UK as of the 2001 census.
While the UK has a rich religious history and diversity, the country has been moving towards secularism, with a significant portion of the population identifying with no particular religion.
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Protestantism vs Catholicism
Protestantism and Catholicism are two denominations of Christianity, much like Shia and Sunni are sects of Islam. The Catholic Church was the established religion in England, Scotland, Wales, and Ireland before the Reformation.
The Reformation of 1517, led by church leaders Luther, Zwingli, Calvin, and others, protested the practices and abuses of the Catholic Church. This movement eventually broke away from the mother church in Rome, resulting in the birth of Protestantism.
Protestantism is the most widely practised branch of Christianity in the modern United Kingdom, although church attendance has declined across all Christian denominations. Wales has the largest group of Protestants and non-conformists, while Northern Ireland has the highest concentration of Catholics in the UK.
There are several key differences between the beliefs and practices of Protestants and Catholics. Catholics believe that the Pope, as the "Vicar of Christ," is the head of the worldwide Church and is infallible when speaking on matters of faith and morals. Protestants, on the other hand, reject this hierarchical structure and the authority of the Pope.
Mary, the mother of Jesus, is venerated in Catholicism as the "Mother of God" and "Mother of the Church." Catholics pray to Mary and create artwork and iconography featuring her prominently. While Protestants may respect Mary, they generally do not accord her the same level of devotion as Catholics do.
In terms of salvation, Protestants believe that salvation is by faith alone, through grace alone, in Christ alone. In contrast, the Catholic Church views justification as a process, dependent on the grace received by participating in the Church.
When it comes to the Eucharist, Catholics believe in transubstantiation, the doctrine that the bread and wine used in mass become the literal body and blood of Christ. Some Protestants, like Lutherans, hold the perspective of consubstantiation, where the body and blood of Christ coexist with the bread and wine.
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History of religious conflict
The United Kingdom has a long history of religious conflict, dating back to the Middle Ages when the Catholic Church was the dominant form of Western Christianity in the country. With the Protestant Reformation of 1517, which protested major problems within the Catholic Church, the religious landscape of the UK began to shift.
The proto-Protestant Lollard movement, founded by John Wycliffe, had gained considerable followers in England and Scotland from the 14th to 16th centuries, setting the stage for the upcoming religious reforms. In the 1530s, King Henry VIII separated the Church of England from Rome, definitively establishing Protestantism in England and Wales. Scotland followed suit with its own Scottish Reformation in the 16th century, led by John Knox, resulting in the establishment of the Presbyterian Church of Scotland as the national church.
The religious reforms sparked by the Reformation led to widespread conflict and persecution across Europe, including in the British Isles. The Thirty Years' War (1618-1648), which saw Protestant and Catholic forces clash, had a significant British chapter in the English Civil War (1642-1651). The religious conflict within the Parliament, between extreme Protestants and the King's Anglicanism, was a key factor leading to this war. The civil war transformed the British state and had a profound impact on political philosophy, influencing thinkers such as John Locke.
The post-restoration Parliaments of the 1660s and 1670s enacted penal laws that persecuted Catholics and nonconformist groups, leading to violent religious disturbances across England, Scotland, and Wales. During this period, public office holders and others were required to swear an oath recognising the King as the head of the Church of England, with those refusing facing the loss of civil rights.
While religious attendance and membership have declined across the UK in recent decades, the country's history has been significantly shaped by the religious conflicts between Protestants and Catholics, and the ongoing presence of these religious groups.
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Religious demographics
The United Kingdom does not have an official state religion, but its religious demographics have historically been shaped by Christianity, with the country being a part of the Catholic Church until the English Reformation in 1534, when the Anglican Church of England became the independent established church in England and Wales. Scotland followed suit in a separate Scottish Reformation, establishing the Presbyterian Church of Scotland as its national church.
Since then, Protestantism has been the most widely practised branch of Christianity in the UK, with the Church of England having more members than other churches. However, active participation in the church has declined in recent years, with a growing number of people identifying as 'other', having no religious beliefs, or having arrived from non-Christian countries.
According to the 2021 Census for England and Wales, 46.2% of the population identified as Christian, followed by 37.2% with no religion, 6.5% Muslim, 1.7% Hindu, 0.9% Sikh, 0.5% Buddhist, 0.5% Jewish, and 0.6% other religions. Among Christians, Anglicanism is the most common denomination, with 53% of Christian believers in the UK identifying with this denomination as of 2023, followed by Catholicism, Presbyterianism, Methodism, Unitarianism, and Baptists.
In Scotland, the 2022 census indicated that the majority (51%) had no religion, with 38.8% identifying as Christian, of which 20% identified with the Church of Scotland and 13% with the Catholic Church. Northern Ireland has the highest concentration of Catholics in the UK, with 79.7% identifying as Christian, 17.4% with no religion, 1.3% with other religions, and 1.5% not stating a religion.
The religious demographics of the UK have become increasingly diverse due to immigration, with significant growth in Islam, Hinduism, and Sikhism. Additionally, the rise of secularism and religious pluralism has contributed to a decline in religious affiliation, with the UK being described as a post-Christian, multi-faith, or secularised society.
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Secularisation in the UK
The UK has historically been a Christian country, with the Catholic Church being the dominant form of Western Christianity during the Middle Ages. However, in the 16th century, the English Reformation led to the establishment of the Church of England as an independent church in England and Wales, marking the start of Protestantism in the country. Scotland also underwent a separate Scottish Reformation during this period, resulting in the establishment of the Presbyterian Church of Scotland as the national church.
Today, the UK is becoming increasingly secular, with a decline in traditional forms of religion. While Christianity remains the largest religion in the UK, with 50% of the population identifying as Christians in 2019, there has been a steady decline in church membership and attendance. This is especially true among the younger generations, with more than 50% of people in their 20s in England and Wales identifying as non-religious. The number of young Christians has also significantly declined, with only 1% of young people identifying as members of the Church of England.
The rise of secularism in the UK has been accompanied by a decrease in trust in religious institutions. Opinion polls indicate diminishing respect for and confidence in the church and clergy since the 1960s, with only 11% of people trusting churches and religious organisations in 2019. Additionally, there has been a decline in religious socialisation, with non-religious parents successfully transmitting their lack of faith to their children.
However, it is important to note that secularisation in the UK is not uniform. While some indicators of secularisation, such as belief in an afterlife, have shown stability, others, such as religious authority, have been on a downward trajectory. Additionally, while the number of people identifying as non-religious is increasing, this does not necessarily mean that they are atheists or anti-religious. Many individuals who identify as non-religious may still hold spiritual beliefs or follow alternative religions.
The UK's growing secularisation has sparked debates about the role of religion in society. Campaigners for non-religious people have argued that the UK government needs to renegotiate the place of religion or belief in contemporary society. There are also discussions about the relevance of the church to young people, with some scholars arguing that the Christian Church is "radically out of step" with the current generation.
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Frequently asked questions
The UK has a majority of Protestants, but there is also a large Catholic population.
The 2021 census found that 45.7% of people in Northern Ireland were Catholic, overtaking the Protestant percentage (43.5%) for the first time. In the UK as a whole, the May 2019 Special Eurobarometer found that 13% of the population was Catholic.
The May 2019 Special Eurobarometer found that 14% of the UK population was Protestant.
Catholicism and Protestantism are two branches of Christianity. They differ in their beliefs and practices, with Protestantism arising from the Reformation in protest of major problems within the Catholic Church.
No, before the Reformation, the Catholic Church was the dominant form of Christianity in the UK. England, Wales, Scotland, and Ireland were all closely tied to Roman Catholicism.











































