- Daingean
- Dalkey
- Danescastle
- Darndale
- Delvin
- Derrinturn
- Derry
- Derrybeg
- Dingle
- Dollymount
- Donabate
- Donaghmede
- Donard
- Donaskeagh
- Donegal
- Doneraile
- Donnybrook
- Donnycarney
- Donore
- Dooagh
- Doon
- Doonbeg
- Dowra
- Drangan
- Drimoleague
- Drogheda
- Droichead Nua
- Dromahair
- Dromcollogher
- Dromina
- Dromiskin
- Drommahane
- Dromod
- Dromore West
- Drumcondra
- Drumconrath
- Drumkeen
- Drumkeeran
- Drumlish
- Drumshanbo
- Drumsna
- Duagh
- Dublin
- Duleek
- Dún Laoghaire
- Dún Lúiche
- Dunboyne
- Duncannon
- Dundalk
- Dunderrow
- Dunderry
- Dundrum
- Dundrum
- Dunfanaghy
- Dungarvan
- Dungloe
- Dunhill
- Duniry
- Dunkineely
- Dunlavin
- Dunleer
- Dunmanway
- Dunmore
- Dunmore East
- Dunshaughlin
- Durrow
- Durrus
