| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Cwm | Wales | Denbighshire | St Asaph | churchyard | Yes | Lost | View On Map |
| Cwm Penllwynog – near Wenvoe | Wales | Glamorgan | Cardiff | woodland | Yes | Ancient 4m-5m | View On Map |
| Cwm-Hydfer | Wales | Powys | Llandovery | field | No | Notable | View On Map |
| Cwmbach Llechryd | Wales | Powys | Builth Wells | hedge | Yes | Notable | View On Map |
| Cwmcarvan | Wales | Monmouthshire | Monmouth | churchyard | Yes | Ancient 5m-7m, Notable | View On Map |
| Cwmdu | Wales | Powys | Abergavenny | churchyard | Yes | Notable | View On Map |
| Cwmmau farmhouse – Brilley | England | Herefordshire | Kington | garden | No | Ancient 5m-7m | View On Map |
| Cwmyoy | Wales | Monmouthshire | Abergavenny | churchyard | Yes | Lost | View On Map |
| Cyffylliog | Wales | Denbighshire | Ruthin | churchyard | Yes | Ancient 5m-7m, Ancient 7m+, Notable | View On Map |
| Dalhousie Castle | Scotland | Midlothian | Edinburgh | castle | No | Ancient 4m-5m | View On Map |
| Dalkeith Country Park | Scotland | Midlothian | Edinburgh | estate | Yes | Notable | View On Map |
| Dalswinton | Scotland | Dumfries and Galloway | Dumfries | parkland | Yes | Ancient 4m-5m | View On Map |
| Dalwood | England | Devon | Axminster | churchyard | Yes | Notable | View On Map |
| Damblainville | France | Calvados - Normandie | Falaise | churchyard | Yes | Notable | View On Map |
| Damerham | England | Hampshire | Fordingbridge | churchyard | Yes | Notable | View On Map |
| Damerham Knoll | England | Hampshire | Fordingbridge | boundary | Yes | Ancient 5m-7m | View On Map |
| Dane End/Little Munden | England | Hertfordshire | Stevenage | churchyard | Yes | Ancient 5m-7m | View On Map |
| Danebury Hill | England | Hampshire | Andover | earthworks | Yes | Ancient 4m-5m | View On Map |
| Dangy | France | Manche - Normandie | Saint - Lô | churchyard | Yes | Ancient 5m-7m | View On Map |
| Daresbury | England | Cheshire | Warrington | churchyard | Yes | Notable | View On Map |