
The Catholic Church in Ireland is organised into four ecclesiastical provinces, each headed by a metropolitan archbishop. There are 26 dioceses on the island of Ireland, each led by a diocesan bishop, including four metropolitan archdioceses. There are 1,087 parishes, most of which are governed by parish priests. The number of people entering the priesthood in Ireland has been declining, with the number of clerics dying or retiring exceeding the number of new priests.
| Characteristics | Values |
|---|---|
| Number of parishes | 1,087 |
| Number of secular clergy | 3,000 |
| Number of regular clergy | 700 |
| Number of dioceses | 26 |
| Number of titular sees | 17 |
| Percentage of population identifying as Catholic in 2022 | 69% |
| Percentage of population identifying as Catholic in 2016 | 79% |
| Percentage of population identifying as Catholic in 2011 | 84.2% |
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What You'll Learn

There are 1,087 Catholic parishes in Ireland
The Catholic Church in Ireland is organised into four ecclesiastical provinces, each headed by an archbishop. There are 1,087 Catholic parishes in Ireland, most of which are governed by parish priests, with a few overseen by administrators. The number of secular clergy in Ireland, including parish priests, administrators, curates, chaplains, and professors in colleges, is approximately 3,000.
The Catholic Church in Ireland has seen a decline in recent years, with the number of clerics dying or retiring exceeding the number of new priests. This has led to concerns about the potential closure of parishes. The Association of Catholic Priests (ACP), a voluntary association with over 1,000 members, has advocated for reforms such as relaxing celibacy rules and ordaining married men and women to address these challenges.
The island of Ireland is divided into 26 dioceses, each led by a diocesan bishop, including four metropolitan archdioceses. These dioceses are organised into a single all-island Episcopal Conference based in Armagh. The boundaries of Roman Catholic dioceses in Ireland do not conform to the political border between the Republic of Ireland and Northern Ireland, with one archdiocese and three dioceses straddling the international border, and two dioceses wholly within Northern Ireland.
The history of the Catholic Church in Ireland dates back to the Synod of Rathbreasail in 1111, which established the diocesan system of Christian church government. This was later modified by the Synod of Kells in 1152. In the years surrounding the Great Famine, the Catholic Church played a significant role in evangelising other nations and promoting stricter observance of Catholicism in Ireland. This led to the Parish Mission's Movement, which also advocated for healthcare and education reforms.
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26 dioceses in Ireland
The Catholic Church in Ireland is divided into 26 dioceses, each led by a diocesan bishop. These dioceses are organised into four ecclesiastical provinces, each headed by a metropolitan archbishop. The four ecclesiastical provinces are:
- Province of Armagh – Metropolitan Archdiocese of Armagh (includes parts of counties Armagh, Louth, Londonderry and Tyrone)
- Province of Cashel – Diocese of Cashel (united with the Diocese of Emly)
- Province of Munster – Diocese of Waterford and Lismore, Diocese of Ardagh and Clonmacnoise, Diocese of Killaloe, Diocese of Limerick, Diocese of Kerry, Diocese of Cloyne, Diocese of Cork and Ross, and Diocese of Ross
- Province of Leinster – Diocese of Meath, Diocese of Kildare and Leighlin, Diocese of Ossory, Diocese of Dublin, Diocese of Ferns, and Diocese of Kilkenny
The boundaries of the Roman Catholic dioceses in Ireland do not conform to the political border between the Republic of Ireland and Northern Ireland. One archdiocese and three dioceses straddle the international border, while two dioceses are wholly in Northern Ireland.
The diocesan system of Christian church government in Ireland was set up by the Synod of Rathbreasail in 1111 and modified by the Synod of Kells in 1152, replacing the earlier Celtic Christian monastic model.
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Catholic Church reform in Ireland
The Catholic Church in Ireland, or the Irish Catholic Church, is part of the worldwide Catholic Church and is in communion with the Holy See. It is the largest Christian church in Ireland, with 3.5 million members in the Republic of Ireland. In the 2022 census, 69% of the population of the Republic of Ireland identified as Roman Catholic, a significant decline from the 84.2% who identified as such in the 2011 census. In Northern Ireland, 42.3% identified as Catholic in the 2021 census, up from 41% in 2011.
The Catholic Church in Ireland has a long and complex history that dates back to the 5th century when Christianity arrived from Roman Britain, famously associated with Saint Patrick. Over the centuries, the Catholic Church in Ireland has undergone various reforms and transformations, often influenced by political and social changes in the country.
One significant period of reform was during the 16th-century English Reformation, when monarchs alternately supported or opposed papal supremacy. King Henry VIII of England, seeking an annulment of his marriage, broke with the Catholic Church and asserted his lordship over it in Ireland. He arranged to be declared head of the "Church in Ireland" through an act of the Irish Parliament in 1534, known as the Act of Supremacy. This marked a breach with the Catholic Church and the beginning of the establishment of the Protestant Church of Ireland as the state church. However, a substantial majority of the population remained Catholic, despite the political and economic advantages of membership in the state church.
During the reign of Queen Mary I of England (1553-1558), who was Catholic, orthodox Roman Catholicism was reimposed, and clerics loyal to Rome were chosen for vacant Episcopal sees. In 1555, Mary and her husband, Philip, King of Spain, were granted a papal bull by Pope Paul IV, reconfirming their status as the Catholic King and Queen of the Kingdom of Ireland.
Another important period of reform was in the years surrounding the Great Famine in the 19th century. The Catholic Church played an active role in evangelisation and missionary work during this time, both in Ireland and overseas. The Parish Mission's Movement emerged as a response to the famine, leading to a stricter observance of Catholicism in Ireland, as well as a push for reform in healthcare and education.
More recently, in the late 20th and early 21st centuries, the Catholic Church in Ireland has continued to undergo changes. The Second Vatican Council in the 1960s brought about significant reforms, including the use of vernacular languages in Mass instead of Latin. Additionally, there has been a decline in the number of men entering the priesthood, and there have been calls for further reforms, such as relaxing celibacy rules and ordaining women to the diaconate. The Association of Catholic Priests (ACP) has been a prominent voice in advocating for reform to prevent parishes from closing due to the shortage of priests.
The Catholic Church in Ireland is organised into four ecclesiastical provinces, each headed by a metropolitan archbishop, with a total of 26 dioceses on the island. While the church has seen a decline in membership in recent years, it remains an influential part of Irish society, with a worldwide network of Irish Catholic diaspora.
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Catholic dioceses in Northern Ireland
The Catholic Church in Ireland maintains a Latin Church hierarchy, encompassing both the Republic of Ireland and Northern Ireland. The island of Ireland is divided into four ecclesiastical provinces, each headed by a metropolitan archbishop. The Catholic dioceses in Northern Ireland include:
Metropolitan Archdiocese of Armagh
The Metropolitan Archdiocese of Armagh includes parts of counties Armagh, Louth, Londonderry, and Tyrone. It is the primatial see of all of Ireland, with its seat in Northern Ireland and a part in the Republic of Ireland.
Diocese of Clogher
The Diocese of Clogher includes parts of counties Tyrone, Fermanagh, and Monaghan. Its seat is in the Republic of Ireland, with a portion in Northern Ireland.
Diocese of Derry
The Diocese of Derry includes parts of counties Londonderry, Antrim, Donegal, and Tyrone. Its seat is in Northern Ireland, with a portion in the Republic of Ireland.
Diocese of Kilmore
The Diocese of Kilmore includes parts of County Fermanagh.
Diocese of Down and Connor
This diocese is located only in Northern Ireland.
It is worth noting that the boundaries of the Roman Catholic dioceses in Ireland do not conform to the political border between the Republic of Ireland and Northern Ireland. One archdiocese and three dioceses straddle the international border, while two dioceses are wholly within Northern Ireland.
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Catholic religious orders in Ireland
Catholicism in Ireland is organised into four ecclesiastical provinces, each headed by a metropolitan archbishop. There are 26 dioceses on the island, each led by a diocesan bishop (including four Metropolitan Archdioceses). They are organised into a single all-island Episcopal Conference that is based in the primatial see of Armagh. The Holy See is represented by the Apostolic Nuncio to Ireland.
There are about 3,000 secular clergy in Ireland, including parish priests, administrators, curates, chaplains, and professors in colleges. The Association of Catholic Priests is a voluntary association of clergy in Ireland that has more than 1,000 members. There are also many religious orders, which include: Augustinians, Capuchins, Carmelites, Fathers of the Holy Ghost, Dominicans, Franciscans, Jesuits, Marists, Missionaries of Charity, Oblates, Passionists, Redemptorsists, and Vincentians. The total number of regular clergy is about 700.
Two societies of priests were founded in Ireland: St Patrick's Missionary Society, with its headquarters in County Wicklow, and the Missionary Society of St. Columban based in County Meath. Almost all Catholic religious in Ireland belong to the Latin Church.
The Christian Brothers is a notable religious order that began in Waterford in 1802 when Edmund Ignatius Rice opened a school for poor children. The order has since expanded globally, and today there are about 250 Christian Brothers in Ireland. The Edmund Rice Schools Trust runs 96 Christian Brother schools in the country.
The Religious Sisters of Charity is another prominent order, founded by Mary Aikenhead in 1815 "to give to the poor what the rich could buy with money". The order has almost 150 communities across Ireland, England, Scotland, North and South America, Australia, Nigeria, and Zambia. It has 264 sisters in Ireland, with an average age of 74 years. The Sisters of Charity are known for their hospice work and their support for marginalised people, including the homeless, prisoners, immigrants, and those with addictions.
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