| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Carantilly | France | Manche - Normandie | Saint - Lô | churchyard | Yes | Ancient 4m-5m | View On Map |
| Capler Camp | England | Herefordshire | Hereford | earthworks | Yes | Ancient 4m-5m | View On Map |
| Capel-y-ffin – Baptist Chapel | Wales | Powys | Hay-on-Wye | churchyard | Yes | Notable | View On Map |
| Capel-y-ffin | Wales | Powys | Hay-on-Wye | churchyard | Yes | Ancient 4m-5m, Ancient 5m-7m | View On Map |
| Capel Llanilltern | Wales | Cardiff | Cardiff | churchyard | Yes | Notable | View On Map |
| Capel Glyn Collwng – Talybont-on-Usk | Wales | Powys | Merthyr Tydfil | former religious site | Yes | Ancient 4m-5m | View On Map |
| Capel Garmon | Wales | Conwy | Betws-y-Coed | churchyard | Yes | Notable | View On Map |
| Capel – Surrey | England | Surrey | Crawley | churchyard | Yes | Ancient 5m-7m | View On Map |
| Capel – Kent | England | Kent | Royal Tunbridge Wells | churchyard | Yes | Ancient 7m+, Notable | View On Map |
| Cantref | Wales | Powys | Brecon | churchyard | Yes | Ancient 5m-7m, Lost, Notable | View On Map |
| Canon Pyon | England | Herefordshire | Hereford | footpath/road | Yes | Ancient 7m+ | View On Map |
| Canon Frome Court | England | Herefordshire | Hereford | garden | No | Ancient 4m-5m | View On Map |
| Campagnolles | France | Calvados - Normandie | Vire | churchyard | Yes | Ancient 4m-5m | View On Map |
| Cameley | England | Somerset | Midsomer Norton | churchyard | Yes | Ancient 4m-5m | View On Map |
| Caerwent | Wales | Monmouthshire | Chepstow | churchyard | Yes | Ancient 5m-7m | View On Map |
| Caersws – Park House | Wales | Powys | Newtown | woodland | No | Notable | View On Map |
| Caerleon | Wales | Monmouthshire | Newport | churchyard | Yes | Ancient 4m-5m | View On Map |
| Caerhun – footpath | Wales | Conwy | Bangor | footpath/road | Yes | V - con | View On Map |
| Caerhun | Wales | Conwy | Bangor | churchyard | Yes | Ancient 5m-7m | View On Map |
| Caerau | Wales | Glamorgan | Cardiff | churchyard | Yes | Lost | View On Map |