| Antrim | O'Hara associations with Antrim |
| Armagh | O'Hara associations with Armagh |
| Carlow | O'Hara associations with Carlow |
| Cavan | O'Hara associations with Cavan |
| Clare | O'Hara associations with Clare |
| Cork | O'Hara associations with Cork |
| Derry | O'Hara associations with Derry |
| Donegal | O'Hara associations with Donegal |
| Down | O'Hara associations with Down |
| Dublin | O'Hara associations with Dublin |
| Fermanagh | O'Hara associations with Fermanagh |
| Galway | O'Hara associations with Galway |
| Kerry | O'Hara associations with Kerry |
| Kildare | O'Hara associations with Kildare |
| Kilkenny | O'Hara associations with Kilkenny |
| Laois | O'Hara associations with Laois |
| Leitrim | O'Hara associations with Leitrim |
| Limerick | O'Hara associations with Limerick |
| Longford | O'Hara associations with Longford |
| Louth | O'Hara associations with Louth |
| Mayo | O'Hara associations with Mayo |
| Meath | O'Hara associations with Meath |
| Monaghan | O'Hara associations with Monaghan |
| Offaly | O'Hara associations with Offaly |
| Roscommon | O'Hara associations with Roscommon |
| Sligo | O'Hara associations with Sligo |
| Tipperary | O'Hara associations with Tipperary |
| Tyrone | O'Hara associations with Tyrone |
| Waterford | O'Hara associations with Waterford |
| Westmeath | O'Hara associations with Westmeath |
| Wexford | O'Hara associations with Wexford |
| Wicklow | O'Hara associations with Wicklow |