| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Hay-on-Wye | Wales | Powys | Hay-on-Wye | churchyard | Yes | Notable | View On Map |
| Hayes | England | Greater London | Orpington | churchyard | Yes | Ancient 5m-7m | View On Map |
| Hayton | England | Yorkshire - East Riding | York | planted avenue | Yes | Notable | View On Map |
| Hazlewood Castle | England | Yorkshire - North | Tadcaster | castle | Yes | Notable | View On Map |
| Headley – Lodgebottom Road | England | Surrey | Leatherhead | woodland | Yes | Notable | View On Map |
| Heath – Shropshire | England | Shropshire | Ludlow | churchyard | Yes | Lost | View On Map |
| Heavitree | England | Devon | Exeter | churchyard | Yes | Notable | View On Map |
| Hecmanville | France | Eure - Normandie | Bernay | churchyard | Yes | Ancient 4m-5m | View On Map |
| Hedgerley | England | Buckinghamshire | Slough | churchyard | Yes | Ancient 4m-5m | View On Map |
| Hedsor | England | Buckinghamshire | High Wycombe | footpath/road | Yes | Ancient 4m-5m, Ancient 5m-7m | View On Map |
| Hedsor – churchyard | England | Buckinghamshire | High Wycombe | churchyard | Yes | Lost | View On Map |
| Hedsor – Woolman’s Wood | England | Buckinghamshire | High Wycombe | footpath/road | Yes | Notable | View On Map |
| Heightington | England | Worcestershire | Worcester | Yes | Lost | View On Map | |
| Helmdon | England | Northamptonshire | Banbury | churchyard | Yes | Ancient 7m+ | View On Map |
| Helmsley (Duncombe Park) | England | Yorkshire - North | York | parkland | Yes | Ancient 4m-5m | View On Map |
| Hemsworth | England | Yorkshire - West | Barnsley | churchyard | Yes | Lost | View On Map |
| Hemyock | England | Devon | Wellington | churchyard | Yes | Ancient 7m+ | View On Map |
| Henden Manor Estate – Ide Hill | England | Kent | Sevenoaks | garden | No | Ancient 4m-5m, Lost | View On Map |
| Hendon | England | Greater London | London | churchyard | Yes | Notable | View On Map |
| Hendre – nr Glewstone | England | Herefordshire | Ross-on-Wye | estate | No | Lost | View On Map |