D
- (County Galway) Doonaun
- (County Galway) Derrygoolin
- (County Galway) Derreennamucka
- (County Galway) Drumkeary
- (County Galway) Drumatober
- (County Galway) Derreenboy
- (County Galway) Doon
- (County Galway) Dundoogan
- (Roscommon) Duggarry
- (Roscommon) Doyles Bridge
- (Roscommon) Derrylahan
- (Roscommon) Derrmeel
- (Roscommon) Drumlosh
- (Roscommon) Devenish Island
- (County Galway) Dooveher
- (County Galway) Doon Hill
- (County Galway) Drinagh
- (County Galway) Derreen
- (County Galway) Dog Island
- (Mayo County) Dooghill
- (Mayo County) Derrycoosh
- (Mayo County) Drumminaguncan
- (Mayo County) Doonaroya
- (Mayo County) Derrynadivva
- (Mayo County) Doohana
- (Sligo) Drinaghan
- (Mayo County) Derryhulagh
- (Mayo County) Derreen
- (Mayo County) Deel Bridge
- (Mayo County) Doodaun