Ireland has 32 counties: 26 in the Republic of Ireland and 6 in Northern Ireland, grouped into four provinces. They were laid down by English administrations between the 1200s and 1600s over a much older map of kingdoms and lordships — which is why so many county borders make no sense of the country underneath them, and why people still say what county they are from long after the counties stopped governing much of anything.
The county town is where the county was administered from, which is not always its biggest place. Areas are the traditional county, not the modern council.
| County | In Irish | County town | Province | km² |
|---|---|---|---|---|
| Antrim | Aontroim | Antrim | Ulster | 3,086 |
| Armagh | Ard Mhacha | Armagh | Ulster | 1,327 |
| Carlow | Ceatharlach | Carlow | Leinster | 897 |
| Cavan | An Cabhán | Cavan | Ulster | 1,932 |
| Clare | An Clár | Ennis | Munster | 3,450 |
| Cork | Corcaigh | Cork | Munster | 7,508 |
| Donegal | Dún na nGall | Lifford | Ulster | 4,860 |
| Down | An Dún | Downpatrick | Ulster | 2,489 |
| Dublin | Baile Átha Cliath | Dublin | Leinster | 922 |
| Fermanagh | Fear Manach | Enniskillen | Ulster | 1,691 |
| Galway | Gaillimh | Galway | Connacht | 6,151 |
| Kerry | Ciarraí | Tralee | Munster | 4,807 |
| Kildare | Cill Dara | Naas | Leinster | 1,695 |
| Kilkenny | Cill Chainnigh | Kilkenny | Leinster | 2,073 |
| Laois | Laois | Portlaoise | Leinster | 1,720 |
| Leitrim | Liatroim | Carrick-on-Shannon | Connacht | 1,589 |
| Limerick | Luimneach | Limerick | Munster | 2,756 |
| Derry / Londonderry | Doire | Coleraine | Ulster | 2,118 |
| Longford | An Longfort | Longford | Leinster | 1,091 |
| Louth | Lú | Dundalk | Leinster | 826 |
| Mayo | Maigh Eo | Castlebar | Connacht | 5,588 |
| Meath | An Mhí | Navan | Leinster | 2,342 |
| Monaghan | Muineachán | Monaghan | Ulster | 1,295 |
| Offaly | Uíbh Fhailí | Tullamore | Leinster | 2,001 |
| Roscommon | Ros Comáin | Roscommon | Connacht | 2,548 |
| Sligo | Sligeach | Sligo | Connacht | 1,838 |
| Tipperary | Tiobraid Árann | Nenagh | Munster | 4,305 |
| Tyrone | Tír Eoghain | Omagh | Ulster | 3,266 |
| Waterford | Port Láirge | Waterford | Munster | 1,858 |
| Westmeath | An Iarmhí | Mullingar | Leinster | 1,840 |
| Wexford | Loch Garman | Wexford | Leinster | 2,367 |
| Wicklow | Cill Mhantáin | Wicklow | Leinster | 2,027 |
Cork is the largest county in Ireland at about 7,508 km² — larger than the six smallest counties put together. Louth is the smallest, which is where the Wee County comes from.
And the five smallest:
Six counties make up Northern Ireland. The other 26 are in the Republic. The line does not follow the provinces: Ulster has nine counties and three of them — Cavan, Monaghan and Donegal — are in the Republic, so Ulster and Northern Ireland are not two words for the same place, however often they are used that way.
Northern Ireland — 6
Republic of Ireland — 26
32 in all. 26 are in the Republic of Ireland and 6 — Antrim, Armagh, Down, Fermanagh, Londonderry and Tyrone — are in Northern Ireland. They are grouped into four provinces: Ulster with 9, Leinster with 12, Munster with 6 and Connacht with 5.
26. The other six are in Northern Ireland. Note that Ulster, the province, has nine counties: three of them — Cavan, Monaghan and Donegal — are in the Republic, which is why "Ulster" and "Northern Ireland" are not the same thing.
Cork, at about 7,508 km². After it come Galway (6,151 km²), Mayo (5,588 km²), Donegal (4,860 km²) and Kerry (4,807 km²).
Louth, at about 826 km² — small enough that it is often called the Wee County. Carlow (897 km²) and Dublin (922 km²) are next.
The town where a county's administration and assizes were historically seated. It is not always the biggest town: County Antrim's county town is Antrim, though Belfast is far larger, and County Londonderry's is Coleraine rather than Derry.
In the Republic most are, though some have been subdivided — Dublin into four and Tipperary formerly into two ridings. In Northern Ireland the six counties were replaced for administrative purposes in 1973 by district councils, so they survive there as traditional and cultural units rather than governing ones.
All 32 county names in Irish — what they mean and how to say them →
A place that belongs to each county — a mountain, a monastery, a castle, a causeway.
Antrim
Giant's Causeway
Armagh
Navan Fort
Carlow
Brownshill dolmen
Cavan
Lough Oughter
Clare
Cliffs of Moher
Cork
Blarney Castle
Donegal
Slieve League
Down
Mourne Mountains
Dublin
Ha'penny Bridge
Fermanagh
Devenish Island
Galway
Kylemore Abbey
Kerry
Skellig Michael
Kildare
Castletown House
Kilkenny
Kilkenny Castle
Laois
Dunamase
Leitrim
Glencar Lough
Limerick
King John's Castle (Limerick)
Derry / Londonderry
Mussenden Temple
Longford
Corlea Trackway
Louth
Monasterboice
Mayo
Croagh Patrick
Meath
Newgrange
Monaghan
Castle Leslie
Offaly
Clonmacnoise
Roscommon
Boyle Abbey
Sligo
Benbulbin
Tipperary
Rock of Cashel
Tyrone
Beaghmore
Waterford
Reginald's Tower
Westmeath
Fore Abbey
Wexford
Hook Lighthouse
Wicklow
Glendalough
Photographs from Wikimedia Commons under free licences. Each photographer is named on the county page and in the full picture credits. County areas and county towns follow Wikipedia's list of Irish counties by area and Counties of Ireland.