O Surname in Ireland

Breakdown by County for surname: O

Co. Dublin
40378
Co. Cork
23369
Co. Galway
11000
Co. Donegal
6134
Co. Waterford
5793
Co. Kerry
5734
Co. Limerick
5041
Co. Kildare
4912
Co. Mayo
4107
Co. Tipperary
3237
Co. Sligo
3189
Co. Carlow
3182
Co. Meath
3054
Co. Cavan
2889
Co. Wexford
2861
Co. Wicklow
2847
Co. Westmeath
2775
Co. Longford
2048
Co. Kilkenny
2043
Co. Monaghan
2015
Co. Offaly
1553
Co. Clare
1497
Co. Leitrim
1466
Co. Roscommon
1402
Co. Laois
1217
Co. Louth
892

How to use this feature

Enter your surname above and click 'Search', this will bring you to a page with a map showing the distribution of your surname throughout Ireland. Also, if you check the table below, you'll find a more detailed breakdown on how many instances of that surname exist on a county by county basis.