| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Streatley – Bull Inn | England | Berkshire | Reading | garden | Yes | Notable | View On Map |
| Stretton en le Field | England | Leicestershire | Tamworth | churchyard | Yes | Ancient 4m-5m | View On Map |
| Strichen House | Scotland | Aberdeenshire | Fraserburgh | garden | No | Notable | View On Map |
| Stroat | England | Gloucestershire | Chepstow | woodland | No | Ancient 5m-7m | View On Map |
| Strouds Wood | England | Hampshire | Romsey | woodland | No | Ancient 5m-7m, Notable | View On Map |
| Stubbings House – Maidenhead | England | Berkshire | Maidenhead | garden | Yes | Ancient 4m-5m | View On Map |
| Stuc an t – lobairt | Scotland | Argyll and Bute | Tarbet | historic site | No | Ancient 5m-7m | View On Map |
| Studland | England | Dorset | Swanage | churchyard | Yes | Ancient 4m-5m | View On Map |
| Studley Royal Water Garden | England | Yorkshire - North | Ripon | parkland | Yes | Ancient 4m-5m | View On Map |
| Sturminster Marshall | England | Dorset | Poole | churchyard | Yes | Lost | View On Map |
| Sudbury | England | Derbyshire | Uttoxeter | churchyard | Yes | Ancient 4m-5m | View On Map |
| Sulhamstead | England | Berkshire | Reading | churchyard | Yes | Ancient 4m-5m | View On Map |
| Sullington | England | Sussex - West | Worthing | churchyard | Yes | Ancient 5m-7m, Lost | View On Map |
| Sully | France | Calvados - Normandie | Bayeux | churchyard | Yes | Ancient 4m-5m | View On Map |
| Sunbury-on-Thames | England | Greater London | Kingston upon Thames | churchyard | Yes | Notable | View On Map |
| Sundridge | England | Kent | Sevenoaks | churchyard | Yes | Ancient 4m-5m | View On Map |
| Sunninghill | England | Berkshire | Bracknell | churchyard | Yes | Ancient 5m-7m | View On Map |
| Sunningwell | England | Oxfordshire | Abingdon | churchyard | Yes | Ancient 4m-5m | View On Map |
| Sunningwell – Yew Tree House | England | Oxfordshire | Oxford | garden | Yes | Notable | View On Map |
| Sutton | England | Sussex - West | Petworth | churchyard | Yes | Ancient 4m-5m | View On Map |