| 1 | Antrim | Aontroim (Contae Aontroma) | Anthrim, Antrìm, Entrim | Ballymena (formerly Carrickfergus 1850-1970) | Belfast (part) | Ulster | Northern Ireland - UKN0 |
| 2 | Armagh | Ard Mhacha (Contae Ard Mhacha) | Airmagh | Armagh | Craigavon | Ulster | Northern Ireland - UKN0 |
| 3 | Carlow | Ceatharlach (Contae Cheatharlach) | | Carlow | Carlow | Leinster | South-East - IE024 |
| 4 | Cavan | An Cabhán (Contae an Chabháin) | | Cavan | Cavan | Ulster | Border - IE011 |
| 5 | Clare | An Clár (Contae an Chláir) | | Ennis | Ennis | Munster | Mid-West - IE023 |
| 6 | Cork | Corcaigh (Contae Chorcaí) | Coark | Cork | Cork | Munster | South-West - IE025 |
| 7 | Donegal | Dún na nGall (Contae Dhún na nGall) | Dinnygal, Dunnygal | Lifford | Letterkenny | Ulster | Border - IE011 |
| 8 | Down | An Dún (Contae an Dúin) | Doon, Doun | Downpatrick | Belfast (part) | Ulster | Northern Ireland - UKN0 |
| 9 | Dublin | Baile Átha Cliath (Contae Bhaile Átha Cliath) | | Dublin | Dublin | Leinster | Dublin - IE021 |
| 10 | Dún Laoghaire-Rathdown | Dún Laoghaire-Ráth an Dúin | | Dún Laoghaire | Dún Laoghaire | Leinster | Dublin - IE021 |
| 11 | Fingal | Fine Gall | | Swords | Swords | Leinster | Dublin - IE021 |
| 12 | South Dublin | Áth Cliath Theas | | Tallaght | Tallaght | Leinster | Dublin - IE021 |
| 13 | Fermanagh | Fear Manach (Contae Fhear Manach) | Fermanay | Enniskillen | Enniskillen | Ulster | Northern Ireland - UKN0 |
| 14 | Galway | Gaillimh (Contae na Gaillimhe) | | Galway | Galway | Connacht | West - IE013 |
| 15 | Kerry | Ciarraí (Contae Chiarraí) | | Tralee | Tralee | Munster | South-West - IE025 |
| 16 | Kildare | Cill Dara (Contae Chill Dara) | | Naas | Newbridge | Leinster | Mid-East - IE022 |
| 17 | Kilkenny | Cill Chainnigh (Contae Chill Chainnigh) | | Kilkenny | Kilkenny | Leinster | South-East - IE024 |
| 18 | Laois | Laois (Contae Laoise) | | Portlaoise | Portlaoise | Leinster | Midlands - IE012 |
| 19 | Leitrim | Liatroim (Contae Liatroma) | | Carrick-on-Shannon | Carrick-on-Shannon | Connacht | Border - IE011 |
| 20 | Limerick | Luimneach (Contae Luimnigh) | Lïmerick | Limerick | Limerick | Munster | Mid-West - IE023 |
| 21 | Londonderry | Doire (Contae Dhoire) | Lunnonderrie | Coleraine | Derry | Ulster | Northern Ireland - UKN0 |
| 22 | Longford | An Longfort (Contae an Longfoirt) | Langfurd | Longford | Longford | Leinster | Midlands - IE012 |
| 23 | Louth | Lú (Contae Lú) | | Dundalk | Drogheda | Leinster | Mid-East - IE022 |
| 24 | Mayo | Maigh Eo (Contae Mhaigh Eo) | | Castlebar | Castlebar | Connacht | West - IE013 |
| 25 | Meath | An Mhí (Contae na Mí) | | Navan (formerly Trim) | Navan | Leinster | Mid-East - IE022 |
| 26 | Monaghan | Muineachán (Contae Mhuineacháin) | Ronelann | Monaghan | Monaghan | Ulster | Border - IE011 |
| 27 | Offaly | Uíbh Fhailí (Contae Uíbh Fhailí) | | Tullamore (formerly Philipstown) | Tullamore | Leinster | Midlands - IE012 |
| 28 | Roscommon | Ros Comáin (Contae Ros Comáin) | | Roscommon | Roscommon | Connacht | West - IE013 |
| 29 | Sligo | Sligeach (Contae Shligigh) | | Sligo | Sligo | Connacht | Border - IE011 |
| 30 | Tipperary | Tiobraid Árann (Contae Thiobraid Árann) | | Nenagh (formerly Clonmel & Cashel) | Clonmel | Munster | |
| 31 | Tyrone | Tír Eoghain (Contae Thír Eoghain) | Owenslann | Omagh | Omagh | Ulster | Northern Ireland - UKN0 |
| 32 | Waterford | Port Láirge (Contae Phort Láirge) | Wattèrford | Waterford | Waterford | Munster | South-East - IE024 |
| 33 | Westmeath | An Iarmhí (Contae na hIarmhí) | | Mullingar | Athlone | Leinster | South-East - IE024 |
| 34 | Wexford | Loch Garman (Contae Loch Garman) | | Wexford | Wexford | Leinster | South-East - IE024 |
| 35 | Wicklow | Cill Mhantáin (Contae Chill Mhantáin) | | Wicklow | Bray | Leinster | Mid-East - IE022 |
