| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Sarnesfield – A480 | England | Herefordshire | Hereford | footpath/road | Yes | Ancient 5m-7m | View On Map |
| Savernake Forest | England | Wiltshire | Marlborough | woodland | Yes | Notable | View On Map |
| Scone Palace – Moot Hill | Scotland | Perth and Kinross | Perth | historic site | Yes | Notable | View On Map |
| Scotney Castle | England | Kent | Royal Tunbridge Wells | woodland | Yes | Notable | View On Map |
| Screveton | England | Nottinghamshire | Newark-on-Trent | churchyard | Yes | Notable | View On Map |
| Seagrave | England | Leicestershire | Loughborough | churchyard | Yes | Notable | View On Map |
| Seal | England | Kent | Sevenoaks | churchyard | Yes | Ancient 5m-7m | View On Map |
| Seale | England | Surrey | Farnham | footpath/road | No | Ancient 4m-5m | View On Map |
| Seale – Wood Lane | England | Surrey | Farnham | footpath/road | Yes | Ancient 5m-7m | View On Map |
| Seathwaite | England | Cumbria | Ambleside | churchyard | Yes | Ancient 5m-7m | View On Map |
| Seatoller – footpath | England | Cumbria | Keswick | upland | Yes | Ancient 5m-7m | View On Map |
| Seatoller – Honister Yew Tree Restaurant | England | Cumbria | Keswick | garden | Yes | Notable | View On Map |
| Seavington St Mary | England | Somerset | Ilminster | churchyard | Yes | Ancient 5m-7m | View On Map |
| Seavington St Michael | England | Somerset | Ilminster | churchyard | Yes | Ancient 4m-5m | View On Map |
| Secqueville-en- Bessin | France | Calvados - Normandie | Caen | churchyard | Yes | Ancient 4m-5m | View On Map |
| Sedbergh | England | Cumbria | Kendal | churchyard | Yes | Lost, Notable | View On Map |
| Sedgwick Park | England | Sussex - West | Horsham | woodland | Yes | Notable | View On Map |
| Selattyn | England | Shropshire | Oswestry | churchyard | Yes | Ancient 4m-5m, Ancient 5m-7m | View On Map |
| Selborne | England | Hampshire | Alton | churchyard | Yes | Lost | View On Map |
| Selborne – The Wakes | England | Hampshire | Alton | garden | Yes | Ancient 4m-5m | View On Map |