A
- (County Monaghan) Aghlattacru
- (County Donegal) Altnagapple
- (County Donegal) Ardvally
- (County Donegal) Aighe
- (County Donegal) Aughkeely
- (County Donegal) Arbatt
- (County Donegal) Ardmeen
- (County Donegal) Aphort
- (County Donegal) Ardnaglass
- (County Donegal) Ardagh
- (An Cabhán) Aghakinnigh
- (An Cabhán) Aubawn
- (An Cabhán) Aghalackan
- (An Cabhán) Aghadreenagh
- (County Monaghan) Aghnamullen
- (County Donegal) Aughagault Big
- (County Monaghan) Annalittin
- (County Monaghan) Aghnafarcan
- (County Monaghan) Annagleve
- (County Monaghan) Allagesh
- (County Monaghan) Ardaghy
- (County Monaghan) Aghnagap
- (County Monaghan) Aghlaverty
- (County Monaghan) Annaseeragh
- (County Monaghan) Alkill
- (County Monaghan) Annaghroe Bridge
- (County Monaghan) Aghamackalinn
- (An Cabhán) Altshallan
- (An Cabhán) Altateskin
- (An Cabhán) Ardmoneen