List of Irish counties by area
This is a list of the counties of Ireland ordered by area. Counties in the Republic of Ireland are shown in normal type, while those in Northern Ireland are listed in italic type.
| Rank | County | Area | Density | Traditional Province |
| 1 | Cork | | 72.3 | Munster |
| 2 | Galway | | 42.0 | Connacht |
| 3 | Mayo | | 23.3 | Connacht |
| 4 | Donegal | | 32.6 | Ulster |
| 5 | Kerry | | 30.7 | Munster |
| 6 | Tipperary | | 37.2 | Munster |
| 7 | Clare | | 34.4 | Munster |
| 8 | Tyrone | | 54.5 | Ulster |
| 9 | Antrim | | 202.9 | Ulster |
| 10 | Limerick | | 70.8 | Munster |
| 11 | Roscommon | | 25.3 | Connacht |
| 12 | Down | | 215.6 | Ulster |
| 13 | Wexford | | 63.2 | Leinster |
| 14 | Meath | | 83.2 | Leinster |
| 15 | Londonderry | | 119.1 | Ulster |
| 16 | Kilkenny | | 47.8 | Leinster |
| 17 | Wicklow | | 70.2 | Leinster |
| 18 | Offaly | | 38.9 | Leinster |
| 19 | Cavan | | 39.3 | Ulster |
| 20 | Waterford | | 62.7 | Munster |
| 21 | Westmeath | | 48.2 | Leinster |
| 22 | Sligo | | 35.5 | Connacht |
| 23 | Laois | | 49.3 | Leinster |
| 24 | Kildare | | 131.0 | Leinster |
| 25 | Fermanagh | | 36.1 | Ulster |
| 26 | Leitrim | | 20.1 | Connacht |
| 27 | Armagh | | 131.8 | Ulster |
| 28 | Monaghan | | 47.3 | Ulster |
| 29 | Longford | | 37.4 | Leinster |
| 30 | Dublin | 922 | 1,459.2 | Leinster |
| 31 | Carlow | 897 | 63.4 | Leinster |
| 32 | Louth | 826 | 155.4 | Leinster |
| Average | | | |
| Total | Ireland | | 78.1 | |
