D
- (Roscommon) Drinagh
- (County Galway) Drin
- (County Galway) Drimmeen
- (County Galway) Doonguddle
- (Mayo County) Dooleeg More
- (Mayo County) Dooega
- (Mayo County) Doocastle
- (County Galway) Derryrush
- (County Galway) Derrymullan
- (Sligo) Derrylehan
- (County Galway) Derryfrench
- (County Galway) Derrybrien
- (County Leitrim) Derrinvoney
- (Mayo County) Derrinkee
- (County Galway) Derrew
- (Roscommon) Derreenavoggy
- (Mayo County) Derreen
- (Sligo) Dernish Island
- (County Leitrim) Dernahelty More
- (County Leitrim) Dernahelty Beg
- (County Galway) Dawros
- (County Galway) Dawros Beg
- (County Galway) Davillaun
- (County Galway) Dalgin
- (County Galway) Doonloughan
- (Mayo County) Dooghbeg
- (Mayo County) Dooyork
- (County Leitrim) Drumbrick
- (Mayo County) Dromada
- (Mayo County) Drumslinnagh