| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Riddell | Scotland | Scottish Borders | Selkirk | woodland | Yes | Ancient 4m-5m | View On Map |
| Riddlesdown SSSI | England | Surrey | Croydon | woodland | Yes | Notable | View On Map |
| Ridlington | England | Rutland | Leicester | garden | No | Ancient 5m-7m | View On Map |
| Rimpton | England | Somerset | Sherborne | churchyard | Yes | Ancient 4m-5m | View On Map |
| Ringmore | England | Devon | Kingsbridge | churchyard | Yes | Ancient 4m-5m | View On Map |
| Ringwould | England | Kent | Deal | churchyard | Yes | Ancient 5m-7m, Ancient 7m+ | View On Map |
| Ripple | England | Kent | Deal | churchyard | Yes | Ancient 4m-5m, Ancient 5m-7m | View On Map |
| Roachestown House – Slane | Ireland | Co. Meath | Rathkenny | footpath/road | Yes | Ancient 5m-7m | View On Map |
| Roche Abbey | England | Yorkshire - South | Maltby | woodland | Yes | Notable | View On Map |
| Rockbourne – Palmer’s Copse | England | Hampshire | Fordingbridge | footpath/road | Yes | Ancient 5m-7m | View On Map |
| Rockfield | Wales | Monmouthshire | Monmouth | churchyard | Yes | Notable | View On Map |
| Rodden | England | Somerset | Frome | churchyard | Yes | Ancient 4m-5m, Ancient 5m-7m, Notable | View On Map |
| Rodmell | England | Sussex - East | Lewes | churchyard | Yes | View On Map | |
| Roecliffe | England | Yorkshire - North | Ripon | churchyard | Yes | Notable | View On Map |
| Rolvenden | England | Kent | Tenterden | churchyard | Yes | Ancient 4m-5m | View On Map |
| Ropley | England | Hampshire | Alton | churchyard | Yes | Ancient 4m-5m, Notable | View On Map |
| Roscrea | Ireland | Co. Tipperary | Roscrea | parkland | No | Ancient 5m-7m | View On Map |
| Rose Hill Woods | England | Kent | Sittingbourne | garden | Yes | Notable | View On Map |
| Rosemount House – Mountelliott | Ireland | Co. Wexford | New Ross | garden | No | Ancient 4m-5m | View On Map |
| Roslin Castle | Scotland | Midlothian | Edinburgh | historic site | Yes | Ancient 4m-5m | View On Map |