Wales
D
- Dafen
- Dale, Pembrokeshire
- Dan Caerlan
- Dan-y-deri
- Dan-y-Graig
- Danybryn
- Danygraig
- Danygrug
- Danyrhelyg
- Dardy
- Daren
- Daren-felen
- Darland, Wrexham
- Darowen
- Darran Wood
- Darranlas
- Darren
- Darrenfelen
- Darrenlas, Graig
- Davids Well
- Dawn
- Dawson Park
- Ddol, Wales
- Ddol, Wrexham
- Ddol Cownwy
- Ddyrys, Garn
- Dee Bank
- Deepweir
- Deerland
- Deeside
- Defeidiog-ganol
- Defynnog
- Deganwy
- Deiniolen
- Delph, Wrexham
- Denant
- Denbigh
- Denio
- Denman, Gardd
- Denscombe
- Deri
- Derlwyn, Wales
- Derlwyn, Ceredigion
- Derlwyn, Powys
- Derry Ormond
- Derwen, Wales
- Derwen, Denbighshire
- Derwen Fawr
- Derwen Las
- Derwenlas
- Derwydd
- Dethenydd
- Deuddwr
- Devauden
- Devil's Bridge
- Dewi, Capel
- Dewi, Ffordd
- Dewstow, Little
- Dians Mawddwy
- Dieu, Parc Grace
- Dihewyd
- Dimlands
- Dimpath
- Dinam
- Dinas, Wales
- Dinas, Gwynedd
- Dinas, Rhondda Cynon Taf
- Dinas Bach
- Dinas Cross
- Dinas Dinlle
- Dinas Mawddwy
- Dinas Powis
- Dinas Powys
- Dinbych
- Dinbych-y-Pysgod
- Dinefwr Park
- Dingestow
- Dinham, Wales
- Dinmael
- Dinmore
- Dinorwic
- Dinorwig
- Dinorwig, Port
- Discoed
- Discoed, Llanvair
- Disserth
- Dixton, Wales
- Dobs Hill
- Doc Penfro
- Docks, Wales
- Dol-Dre
- Dol-drewyn
- Dol-Fach
- Dol-ffanog
- Dol-gau
- Dol-goch
- Dol-gran
- Dol-Gwden, Cefn
- Dol-Helyg
- Dol-Wen, Coed
- Dol-y-bont
- Dol-y-Cannau
- Dol-y-gareg
- Dol-y-Maen
- Dol-y-pandy
- Dol-yr-Onen
- Dolanog
- Dolarddyn
- Dolau, Wales
- Dolau, Powys
- Dolau, Rhondda Cynon Taf
- Dolau-Arth
- Dolau-Honddu, Pentre
- Dolbenmaen
- Dolcorsllwyn
- Doldowlod
- Dole
- Dolfor
- Dolfor Lock
- Dolforwyn
- Dolgarrog
- Dolgellau
- Dolgran
- Dolley Green
- Dollwen
- Dolobran
- Dolphin
- Dolwar
- Dolwen, Wales
- Dolwen, Powys
- Dolwyd
- Dolwyddelan
- Dolydd
- Dolyhir
- Dolypandy
- Dolyronnen
- Dolywern
- Domgay
- Dothan
- Douglas Hill
- Dovan, Merthyr
- Doward, Little
- Dowlais
- Dowlais Top
- Down, Stormy
- Downs, Vale of Glamorgan
- Downton, Powys
- Draethen
- Dre-fach
- Dreenhill
- Drefach, Wales
- Drefach, Carmarthenshire
- Drefach, Ceredigion
- Drefelin
- Drefelin, Pentre
- Dreflan
- Drelincourt, Berse
- Drim
- Drope
- Druid
- Druid, Ancient
- Druidston
- Druidstone
- Drury
- Drury Lane
- Drws-y-coed
- Dryslwyn
- Dudleston
- Dudston
- Dudwells
- Duffryn
- Dugoed
- Duke's Meadow
- Dukestown
- Dulas
- Dulas, City
- Dunston Park, Wales
- Dunvant
- Dutlas
- Dwygo, Cwm
- Dwygyfylchi
- Dwyran
- Dwyrhiw
- Dyfan, Merthyr
- Dyfatty
- Dyffryd
- Dyffryn, Wales
- Dyffryn, Merthyr Tydfil
- Dyffryn, Pembrokeshire
- Dyffryn, Powys
- Dyffryn, Vale of Glamorgan
- Dyffryn Ardudwy
- Dyffryn Castell
- Dyffryn Ceidrych
- Dyffryn Cellwen
- Dyffryn Clydach
- Dyffryn Dowlats
- Dyffryn Wood
- Dyffryn-mawr
- Dyfnant
- Dylife
- Dynea Road
- Dyserth
- Dysserth