- Ara North
- Ard Eoghain
- Ardagh
- Ardboley
- Ardcloon
- Arderry
- Arderry
- Ardhoom
- Ardkeen
- Ardlee
- Ardmore
- Ardmore Lower
- Ardnaree
- Ardoley
- Ardvally
- Ardvarney
- Ashbrook
- Askillaun
- Attavally
- Attavally
- Atticahill
- Atticlea Island
- Attimachugh
- Attireesh
- Attnaskollia
- Attymass
- Aughernagalliagh
- Aughness
- Aghacurreen
- Aghaderry