| Name | Locality | Local Authority | Administrative area |
| Dderi Road | Cwmllynfell | Castell-nedd Port Talbot / Neath Port Talbot | Castell-nedd Port Talbot / Neath Port Talbot |
| Ddol Awel | Mold | Sir y Fflint / Flintshire | Sir Y Fflint / Flintshire |
| Ddol Ddu | Old Colwyn | Conwy / Conwy | Conwy / Conwy |
| Ddol Hyfryd | Pentir | Gwynedd / Gwynedd | Gwynedd / Gwynedd |
| Ddol Road | Upper Killay | Abertawe / Swansea | Abertawe / Swansea |
| Ddol Road | Dunvant | Abertawe / Swansea | Abertawe / Swansea |
| Ddole Road | Llandrindod Wells | Powys / Powys | Powys / Powys |
| Ddreiniog Road | Whitford | Sir y Fflint / Flintshire | Sir Y Fflint / Flintshire |
