This is a comprehensive list of

Roman Catholic Roman or Romans most often refers to: *Rome, the capital city of Italy * Ancient Rome, Roman civilization from 8th century BC to 5th century AD * Roman people, the people of ancient Rome *'' Epistle to the Romans'', shortened to ''Romans'', a let ...

diocese In church governance, a diocese or bishopric is the ecclesiastical district under the jurisdiction of a bishop. History In the later organization of the Roman Empire, the increasingly subdivided provinces were administratively associa ...

s in the island of Ireland.

Roman Catholicism in Ireland , native_name_lang = ga , image = Armagh, St Patricks RC cathedral.jpg , imagewidth = 200px , alt = , caption = St Patrick's Cathedral, Armagh. , abbreviation = , type ...

comprises only a

Latin rite Latin liturgical rites, or Western liturgical rites, are Catholic rites of public worship employed by the Latin Church, the largest particular church '' sui iuris'' of the Catholic Church, that originated in Europe where the Latin language once ...

hierarchy, encompassing both the

Republic of Ireland Ireland ( ga, Éire ), also known as the Republic of Ireland (), is a country in north-western Europe consisting of 26 of the 32 Counties of Ireland, counties of the island of Ireland. The capital and largest city is Dublin, on the eastern ...

and

Northern Ireland Northern Ireland ( ga, Tuaisceart Éireann ; sco, label= Ulster-Scots, Norlin Airlann) is a part of the United Kingdom, situated in the north-east of the island of Ireland, that is variously described as a country, province or region. Nort ...

, having been unaffected by the

partition of Ireland The partition of Ireland ( ga, críochdheighilt na hÉireann) was the process by which the Government of the United Kingdom of Great Britain and Ireland divided Ireland into two self-governing polities: Northern Ireland and Southern Ireland. ...

in 1920–22. There are no Eastern Catholic jurisdictions, nor other exempt Ordinariates. There are 26 dioceses in Ireland, each led by a diocesan

bishop A bishop is an ordained clergy member who is entrusted with a position of authority and oversight in a religious institution. In Christianity, bishops are normally responsible for the governance of dioceses. The role or office of bishop is c ...

(including four Metropolitan Archdioceses). They are organised into a single all-island

Episcopal Conference An episcopal conference, sometimes called a conference of bishops, is an official assembly of the bishops of the Catholic Church in a given territory. Episcopal conferences have long existed as informal entities. The first assembly of bishops to ...

that is based in the primatial see of Armagh. The Holy See is represented by the Apostolic Nuncio to Ireland. A separate Apostolic Nunciature in London represents the Holy See in England, Wales and Scotland.

Structural changes over the years

The diocesan system of Christian church government in Ireland was set up by the

Synod of Rathbreasail A synod () is a council of a Christian denomination, usually convened to decide an issue of doctrine, administration or application. The word ''synod'' comes from the meaning "assembly" or "meeting" and is analogous with the Latin word meani ...

in 1111 and modified by the

Synod of Kells The Synod of Kells (, ) took place in 1152, under the presidency of Giovanni Cardinal Paparoni, and continued the process begun at the Synod of Ráth Breasail (1111) of reforming the Irish church. The sessions were divided between the abbeys o ...

in 1152, replacing the earlier Celtic Christian monastic model. The island of Ireland is divided into four

ecclesiastical province An ecclesiastical province is one of the basic forms of jurisdiction in Christian Churches with traditional hierarchical structure, including Western Christianity and Eastern Christianity. In general, an ecclesiastical province consists of seve ...

s each headed by a metropolitan archbishop. The provinces were almost co-extensive with their contemporary civil counterparts. After the

Reformation in Ireland The Reformation in Ireland was a movement for the reform of religious life and institutions that was introduced into Ireland by the English administration at the behest of King Henry VIII of England. His desire for an annulment of his marriage ...

, both the Protestant

Church of Ireland The Church of Ireland ( ga, Eaglais na hÉireann, ; sco, label= Ulster-Scots, Kirk o Airlann, ) is a Christian church in Ireland and an autonomous province of the Anglican Communion. It is organised on an all-Ireland basis and is the secon ...

and the Roman Catholic Church saw themselves as successors to the pre-Reformation church. Most bishops were non-resident during the enforcement of the Penal Laws, but the dioceses continued to exist. Whereas

English Catholic The Catholic Church in England and Wales ( la, Ecclesia Catholica in Anglia et Cambria; cy, Yr Eglwys Gatholig yng Nghymru a Lloegr) is part of the worldwide Catholic Church in full communion with the Holy See. Its origins date from the 6th ce ...

dioceses were forbidden by law from having the same name as a diocese of the established

Church of England The Church of England (C of E) is the established Christian church in England and the mother church of the international Anglican Communion. It traces its history to the Christian church recorded as existing in the Roman province of Britai ...

, no such prohibition was made for Irish dioceses. The Roman Catholic dioceses remained close to the original, with a few notable differences. Firstly, several dioceses with small populations were merged, and now have more than one name to represent their merger. Secondly, the Diocese of Galway was created in 1831 following the abolition of the

Wardenship of Galway The Collegiate Church of St. Nicholas is a medieval church building in Galway, Ireland. It is a collegiate church and the parish church of St. Nicholas Church of Ireland parish, which covers Galway city. It was founded in 1320 and dedicated to ...

. James Butler 2nd, the Archbishop of Cashel and Emly (1774–91),Catholic Encyclopedia
/ref> on being appointed by Rome moved his residence and cathedra from Cashel, favouring

Thurles Thurles (; ''Durlas Éile'') is a town in County Tipperary, Ireland. It is located in the civil parish of the same name in the barony of Eliogarty and in the ecclesiastical parish of Thurles. The cathedral church of the Roman Catholic Arc ...

instead, where his successors continue to reign today. Similarly, in the

Diocese of Elphin The Diocese of Elphin () was established following the Synod of Rathbreasail in the year 1118. In that year the see for east Connacht was moved from Roscommon. Elphin was the traditional site of a monastic house established by St Patrick , althou ...

, the

Cathedral A cathedral is a church that contains the '' cathedra'' () of a bishop, thus serving as the central church of a diocese, conference, or episcopate. Churches with the function of "cathedral" are usually specific to those Christian denominatio ...

, which was originally established in the County Roscommon town of Elphin, is now in Sligo. Another change is that the ancient see of Kilfenora has been administered by the Bishop of Galway in the province of Tuam since the late 19th Century. The correct title of the Bishop is now the Bishop of Galway and Kilmacduagh and

Apostolic Administrator An Apostolic administration in the Catholic Church is administrated by a prelate appointed by the pope to serve as the ordinary for a specific area. Either the area is not yet a diocese (a stable 'pre-diocesan', usually missionary apostolic adm ...

of Kilfenora. More recently, the Diocese of Ross merged with the Diocese of Cork to form the

Diocese of Cork and Ross The Diocese of Cork and Ross ( ga, Deoise Chorcaí agus Rosa) is a Roman Catholic diocese in southern Ireland, one of six suffragan dioceses in the ecclesiastical province of Cashel and Emly. The cathedral church of the diocese is Cathedral ...

in the 1950s.

Geographic boundaries

Unlike many (European) countries, the boundaries of the Roman Catholic dioceses in Ireland do not conform with the political border between the Republic of Ireland (independent) and Northern Ireland (part of the UK). One archdiocese and three dioceses straddle the international border; two dioceses are wholly in Northern Ireland. * Metropolitan Archdiocese of Armagh (includes parts of counties Armagh,

Louth Louth may refer to: Australia *Hundred of Louth, a cadastral unit in South Australia * Louth, New South Wales, a town * Louth Bay, a bay in South Australia **Louth Bay, South Australia, a town and locality Canada * Louth, Ontario Ireland * Cou ...

, Londonderry and Tyrone) * Diocese of Clogher (includes parts of counties Tyrone,

Fermanagh Historically, Fermanagh ( ga, Fir Manach), as opposed to the modern County Fermanagh, was a kingdom of Gaelic Ireland, associated geographically with present-day County Fermanagh. ''Fir Manach'' originally referred to a distinct kin group of a ...

and

Monaghan Monaghan ( ; ) is the county town of County Monaghan, Ireland. It also provides the name of its civil parish and barony. The population of the town as of the 2016 census was 7,678. The town is on the N2 road from Dublin to Derry and Lette ...

) * Diocese of Derry (includes parts of counties Londonderry, Antrim, Donegal, and Tyrone) * Diocese of Kilmore (includes parts of County Fermanagh) *

Diocese of Down and Connor The Diocese of Down and Connor, ( ga, Deoise an Dúin agus Chonaire) is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Northern Ireland. It is one of eight suffragan dioceses in the ecclesiastical province of the me ...

(in Northern Ireland) * Diocese of Dromore (in Northern Ireland)

Current dioceses

Ecclesiastical province of Armagh

Approximating the civil

province A province is almost always an administrative division within a country or state. The term derives from the ancient Roman '' provincia'', which was the major territorial and administrative unit of the Roman Empire's territorial possessions ou ...

Ulster Ulster (; ga, Ulaidh or ''Cúige Uladh'' ; sco, label= Ulster Scots, Ulstèr or ''Ulster'') is one of the four traditional Irish provinces. It is made up of nine counties: six of these constitute Northern Ireland (a part of the United Kin ...

; mainly in Northern Ireland. Trinitarian Abbey, Limerick, Ireland

* Metropolitan Archdiocese of Armagh,

primatial see Primate () is a title or rank bestowed on some important archbishops in certain Christian churches. Depending on the particular tradition, it can denote either jurisdictional authority ( title of authority) or (usually) ceremonial precedence (t ...

of all Ireland – seat Northern Ireland, part in Republic of Ireland ** Diocese of Ardagh (united with the titular bishopric Clonmacnois) – Republic of Ireland only ** Diocese of Clogher - seat in Republic of Ireland, part in Northern Ireland ** Diocese of Derry - seat Northern Ireland, part in Republic of Ireland **

- Northern Ireland only ** Diocese of Dromore - Northern Ireland only ** Diocese of Kilmore - seat Republic of Ireland, part in Northern Ireland **

Diocese of Meath The Diocese of Meath ( ga, Deoise na Mí) is an Irish diocese which took its name after the ancient Kingdom of Meath. In the Roman Catholic Church it still exists as a separate diocese, but in the Church of Ireland it has been united with other ...

- Republic of Ireland only ** Diocese of Raphoe - Republic of Ireland only

Ecclesiastical province of Cashel

Approximating the civil province of Munster. * Metropolitan

Archdiocese of Cashel and Emly The Archdiocese of Cashel and Emly ( ga, Ard-Deoise Chaisil agus Imligh) is an ecclesiastical territory or archdiocese of the Catholic Church ( particularly the Roman Catholic or Latin Church) located in mid-western Ireland and the metropolis o ...

** Diocese of Cloyne **

** Diocese of Kerry **

Diocese of Killaloe The Diocese of Killaloe ( ) may refer either to a Roman Catholic or a Church of Ireland (Anglican) diocese, in Ireland. Roman Catholic diocese The Diocese of Killaloe is the second largest Roman Catholic diocese in Ireland. It comprises the ...

** Diocese of Limerick ** Diocese of Waterford and Lismore

Ecclesiastical province of Dublin

Approximating the civil province of

Leinster Leinster ( ; ga, Laighin or ) is one of the provinces of Ireland, situated in the southeast and east of Ireland. The province comprises the ancient Kingdoms of Meath, Leinster and Osraige. Following the 12th-century Norman invasion of ...

* Metropolitan Archdiocese of Dublin ** Diocese of Ferns **

Diocese of Kildare and Leighlin The Roman Catholic Diocese of Kildare and Leighlin (; ga, Deoise Chill Dara agus Leithghlinn) is a Roman Catholic diocese in eastern Ireland. It is one of three suffragan dioceses in the ecclesiastical province of Dublin and is subject to the ...

Diocese of Ossory The Bishop of Ossory () is an episcopal title which takes its name after the ancient of Kingdom of Ossory in the Province of Leinster, Ireland. In the Roman Catholic Church it remains a separate title, but in the Church of Ireland it has been ...

Ecclesiastical province of Tuam

Approximating the civil province of

Connacht Connacht ( ; ga, Connachta or ), is one of the provinces of Ireland, in the west of Ireland. Until the ninth century it consisted of several independent major Gaelic kingdoms ( Uí Fiachrach, Uí Briúin, Uí Maine, Conmhaícne, and Del ...

. * Metropolitan Archdiocese of Tuam ** Diocese of Achonry ** Diocese of Clonfert **

** Diocese of Galway and Kilmacduagh and Kilfenora ** Diocese of Killala As the Diocese of Kilfenora is in the Ecclesiastical province of Cashel, the Bishop of Galway and Kilmacduagh is its apostolic administrator rather than bishop.

Former dioceses

There are seventeen titular sees in Ireland (of which two are united in personal union with current sees): Ardcarne, Ardmore, Ath Truim, Ceanannus Mór, Cell Ausaille, Cill Fhionnúrach (united with Galway and Kilmacduagh), Clonmacnoise (united with Diocese of Ardagh), Cluain Iraird, Cunga Féichin, Domnach Sechnaill, Duleek, Eanach Dúin, Glenndálocha, Inis Cathaig, Louth, Mageó, Roscrea, Slebte, Árd Sratha (formerly as Ardstraw an abbey nullius becoming a diocese, merged into Diocese of Cinél nEógain and Ardstraw; territory now in diocese Derry).

Notes and References

;Inline ;In general
Dioceses of Ireland

Sources and External links

Irish Bishops Conference - Map of the dioceses of Ireland

including

shapefile The shapefile format is a geospatial vector data format for geographic information system (GIS) software. It is developed and regulated by Esri as a mostly open specification for data interoperability among Esri and other GIS software product ...

s for Catholic dioceses; from the Central Statistics Office, Ireland
Catholic-Hierarchy entry
{{Catholic Church in Ireland Dioceses Dioceses, Roman Catholic

Ireland Ireland ( ; ga, Éire ; Ulster Scots dialect, Ulster-Scots: ) is an island in the Atlantic Ocean, North Atlantic Ocean, in Northwestern Europe, north-western Europe. It is separated from Great Britain to its east by the North Channel (Grea ...