Ireland elected 12 MEPs in 4 constituencies for the 2009-2014 period as below:
- Dublin (Dublin city and county) : 3 seats
- East (Carlow, Kildare, Kilkenny, Laois, Louth, Meath, Offaly, Wexford, Wicklow): 3 seats
- North West (Cavan, Clare, Donegal, Galway, Leitrim, Longford, Mayo, Monaghan, Roscommon, Sligo, Westmeath): 3 seats
- South (Cork, Kerry, Limerick, Tipperary, Waterford): 3 seats
However from 2014 Ireland will elect 11 MEPs and the number of constituencies has been reduced to 3.