| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | 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 |
| Roslin Glen East | Scotland | Midlothian | Edinburgh | historic site | Yes | Ancient 4m-5m | View On Map |
| Rosneath – Clachan Road | Scotland | Argyll and Bute | Greenock | estate | Yes | Notable | View On Map |
| Rosneath – Tom a mhoid | Scotland | Argyll and Bute | Garelochhead | Yes | Ancient 4m-5m | View On Map | |
| Ross Priory | Scotland | West Dunbartonshire | Dumbarton | former religious site | No | Ancient 4m-5m | View On Map |
| Rossanna – Ashford | Ireland | Co. Wicklow | Wicklow | historic site | Yes | Ancient 5m-7m | View On Map |
| Rossdhu – Yew Tree Cottage – Loch Lomond | Scotland | Argyll and Bute | Luss | garden | Yes | Ancient 5m-7m | View On Map |
| Rossdhu House – Loch Lomond | Scotland | Argyll and Bute | Luss | parkland | No | Ancient 5m-7m, Ancient 7m+, Lost | View On Map |
| Rotherfield | England | Sussex - East | Crowborough | churchyard | Yes | Ancient 7m+ | View On Map |
| Rots | France | Calvados - Normandie | Caen | churchyard | Yes | Notable | View On Map |
| Roucamps | France | Calvados - Normandie | Vire | churchyard | Yes | Ancient 4m-5m | View On Map |
| Roudsea Wood Nature Reserve | England | Cumbria | Ulverston | woodland | Yes | Ancient 4m-5m | View On Map |
| Roundway Down Devizes | England | Wiltshire | Devizes | historic site | No | Lost | View On Map |
| Roundwood | England | Hampshire | Whitchurch | woodland | Yes | Ancient 4m-5m | View On Map |
| Rous Lench | England | Worcestershire | Alcester | churchyard | Yes | Notable | View On Map |
| Rous Lench Court | England | Worcestershire | Alcester | garden | No | Notable | View On Map |