| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Longparish | England | Hampshire | Whitchurch | footpath/road | No | Ancient 4m-5m | View On Map |
| Longnor | England | Staffordshire | Buxton | churchyard | Yes | Ancient 4m-5m | View On Map |
| Longney | England | Gloucestershire | Gloucester | churchyard | Yes | Ancient 4m-5m | View On Map |
| Longleat | England | Wiltshire | Warminster | garden | No | Ancient 7m+ | View On Map |
| Longhope | England | Gloucestershire | Gloucester | churchyard | Yes | Notable | View On Map |
| Longbridge Deverill | England | Wiltshire | Warminster | churchyard | Yes | Ancient 7m+ | View On Map |
| Long Sutton | England | Hampshire | Farnham | churchyard | Yes | Ancient 5m-7m, Ancient 7m+ | View On Map |
| Long Mynd – Park Coppice | England | Shropshire | Church Stretton | heath/common | Yes | Ancient 5m-7m | View On Map |
| Long Ashton | England | Somerset | Bristol | churchyard | Yes | Ancient 4m-5m | View On Map |
| Lone Barn Lane – nr Corhampton | England | Hampshire | Bishop's Waltham | footpath/road | Yes | Ancient 4m-5m | View On Map |
| Londesborough Park | England | Yorkshire - East Riding | York | parkland | No | Ancient 4m-5m | View On Map |
| Login | Wales | Carmarthenshire | St Clears | former religious site | No | Notable | View On Map |
| Loders | England | Dorset | Bridport | churchyard | Yes | Ancient 5m-7m | View On Map |
| Locks Heath | England | Hampshire | Southampton | woodland | Yes | Ancient 4m-5m | View On Map |
| Lockerley | England | Hampshire | Romsey | churchyard | Yes | Ancient 4m-5m, Ancient 7m+ | View On Map |
| Lochend Wood | Scotland | Edinburgh | Dunbar | woodland | Yes | Notable | View On Map |
| Loch Lomond – Mill of Ross | Scotland | Argyll and Bute | Drymen | woodland | Yes | Notable | View On Map |
| Llywel | Wales | Powys | Llandovery | churchyard | Yes | Ancient 4m-5m, Ancient 5m-7m, Ancient 7m+ | View On Map |
| Llyshendy | Wales | Carmarthenshire | Llandeilo | garden | Yes | Lost | View On Map |
| Llwynfynwent | Wales | Powys | Builth Wells | former religious site | No | Lost | View On Map |