| Archdiocese of Armagh
|
| Diocese
|
Territory
|
Founded
|
| Ardagh and Clonmacnoise
|
County Longford, County Leitrim
|
Synod of Kells-Mellifont (1152)
|
| Clogher
|
County Monaghan, County Fermanagh
|
Synod of Rathbreasail (1111)
|
| Derry
|
County Londonderry, County Tyrone, County Donegal
|
1158
|
| Down and Connor
|
County Antrim, County Londonderry, County Down
|
1451
|
| Dromore
|
County Antrim, County Down, County Armagh
|
514
|
| Kilmore
|
County Cavan
|
Synod of Kells (1152)
|
| Meath
|
County Meath, County Westmeath and County Offaly
|
552
|
| Raphoe
|
County Donegal
|
700
|
