List of Irish counties by area
This is a list of the counties of Ireland ordered by area. 26 of the 32 counties are in the Republic of Ireland and 6 are in Northern Ireland.
| Rank | County | Area | Traditional province | Jurisdiction | Ref. | - |
| - | - | - | - | - | ||
| 1 | Cork | Munster | Republic of Ireland | - | ||
| 2 | Galway | Connacht | Republic of Ireland | - | ||
| 3 | Mayo | Connacht | Republic of Ireland | - | ||
| 4 | Donegal | Ulster | Republic of Ireland | - | ||
| 5 | Kerry | Munster | Republic of Ireland | - | ||
| 6 | Tipperary | Munster | Republic of Ireland | - | ||
| 7 | Clare | Munster | Republic of Ireland | - | ||
| 8 | Tyrone | Ulster | Northern Ireland | - | ||
| 9 | Antrim | Ulster | Northern Ireland | - | ||
| 10 | Limerick | Munster | Republic of Ireland | - | ||
| 11 | Roscommon | Connacht | Republic of Ireland | - | ||
| 12 | Down | Ulster | Northern Ireland | - | ||
| 13 | Wexford | Leinster | Republic of Ireland | - | ||
| 14 | Meath | Leinster | Republic of Ireland | - | ||
| 15 | Londonderry | Ulster | Northern Ireland | - | ||
| 16 | Kilkenny | Leinster | Republic of Ireland | - | ||
| 17 | Wicklow | Leinster | Republic of Ireland | - | ||
| 18 | Offaly | Leinster | Republic of Ireland | - | ||
| 19 | Cavan | Ulster | Republic of Ireland | - | ||
| 20 | Waterford | Munster | Republic of Ireland | - | ||
| 21 | Westmeath | Leinster | Republic of Ireland | - | ||
| 22 | Sligo | Connacht | Republic of Ireland | - | ||
| 23 | Laois | Leinster | Republic of Ireland | - | ||
| 24 | Kildare | Leinster | Republic of Ireland | - | ||
| 25 | Fermanagh | Ulster | Northern Ireland | - | ||
| 26 | Leitrim | Connacht | Republic of Ireland | - | ||
| 27 | Armagh | Ulster | Northern Ireland | - | ||
| 28 | Monaghan | Ulster | Republic of Ireland | - | ||
| 29 | Longford | Leinster | Republic of Ireland | - | ||
| 30 | Dublin | Leinster | Republic of Ireland | - | ||
| 31 | Carlow | Leinster | Republic of Ireland | - | ||
| 32 | Louth | Leinster | Republic of Ireland | - | ||
| Total | Ireland | 84,421 |