| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Swanscombe | England | Kent | Gravesend | churchyard | Yes | Notable | View On Map |
| Swansea High Street | Wales | Glamorgan | Swansea | churchyard | Yes | Lost | View On Map |
| Swarraton | England | Hampshire | Winchester | former religious site | No | Ancient 4m-5m | View On Map |
| Swell | England | Somerset | garden | No | Lost, Notable | View On Map | |
| Swindon – Richard Jefferies garden | England | Wiltshire | Swindon | garden | Yes | Lost | View On Map |
| Swindon – Staffordshire | England | Staffordshire | Stourbridge | footpath/road | Yes | Ancient 5m-7m | View On Map |
| Swiss Cottage – Cahir | Ireland | Co. Tipperary | Tipperary | garden | Yes | Notable | View On Map |
| Swlch Tump | Wales | Powys | Brecon | historic site | Yes | Lost | View On Map |
| Swyncombe Down – Oxfordshire | England | Oxfordshire | Wallingford | woodland | Yes | Notable | No Map Data |
| Sydling St.Nicholas | England | Dorset | Dorchester | churchyard | Yes | Ancient 4m-5m | View On Map |
| Symondsbury | England | Dorset | Bridport | churchyard | Yes | Notable | View On Map |
| Tadley | England | Hampshire | Basingstoke | churchyard | Yes | Lost | View On Map |
| Talachddu | Wales | Powys | Brecon | churchyard | Yes | Ancient 4m-5m, Ancient 5m-7m | View On Map |
| Talgarth | Wales | Powys | Brecon | churchyard | Yes | Ancient 4m-5m, Lost | View On Map |
| Taliaris | Wales | Carmarthenshire | Llanndeilo | churchyard | Yes | Ancient 5m-7m | View On Map |
| Tandridge – churchyard | England | Surrey | Reigate | churchyard | Yes | Ancient 7m+, Notable | View On Map |
| Tandridge – woodland | England | Surrey | Reigate | woodland | No | Ancient 5m-7m | View On Map |
| Tangley | England | Hampshire | Andover | churchyard | Yes | Ancient 5m-7m | View On Map |
| Tangmere | England | Sussex - West | Chichester | churchyard | Yes | Ancient 7m+ | View On Map |
| Tankersley Park | England | Yorkshire - South | Sheffield | parkland | Yes | Lost | View On Map |