| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Gussage St.Michael | England | Dorset | Blandford Forum | churchyard | Yes | Ancient 4m-5m | View On Map |
| Gwenlais | Wales | Carmarthenshire | Llandeilo | former religious site | No | Ancient 4m-5m | View On Map |
| Gwernesney | Wales | Monmouthshire | Usk | churchyard | Yes | Notable | View On Map |
| Gwyddelwern | Wales | Denbighshire | Ruthin | churchyard | Yes | Ancient 4m-5m | View On Map |
| Gwydir Castle | Wales | Conwy | Betws-y-Coed | castle | Yes | Ancient 4m-5m | View On Map |
| Gwytherin | Wales | Conwy | Betws-y-Coed | churchyard | Yes | Ancient 5m-7m, Ancient 7m+ | View On Map |
| Gyffin | Wales | Conwy | Conwy | churchyard | Yes | Ancient 4m-5m, Notable | View On Map |
| Habberley – churchyard | England | Shropshire | Shrewsbury | churchyard | Yes | Ancient 4m-5m, Notable | View On Map |
| Habberley – Shropshire (1) | England | Shropshire | Shrewsbury | woodland | Yes | Ancient 5m-7m | View On Map |
| Habberley – Shropshire (2) | England | Shropshire | Shrewsbury | woodland | Yes | Ancient 4m-5m | View On Map |
| Habberley Valley – Worcestershire | England | Worcestershire | Kidderminster | cliff | Yes | Notable | View On Map |
| Hackhurst Downs | England | Surrey | Dorking | footpath/road | Yes | Ancient 4m-5m, Notable | View On Map |
| Haddington- Gilmerton House | Scotland | East Lothian | Edinburgh | garden | No | Ancient 4m-5m | View On Map |
| Haddon Hall | England | Derbyshire | Bakewell | garden | Yes | Lost | View On Map |
| Hafod – Eglwys Newydd | Wales | Ceredigion | Aberystwyth | churchyard | Yes | Notable | View On Map |
| Hagley | England | Worcestershire | Stourbridge | churchyard | Yes | Lost | View On Map |
| Hailey Wood | England | Gloucestershire | Cirencester | woodland | Yes | Ancient 7m+ | View On Map |
| Hales Hall Pool | England | Staffordshire | Cheadle | planted avenue | Yes | Lost, Notable | View On Map |
| Halford | England | Shropshire | Craven Arms | churchyard | Yes | Ancient 5m-7m | View On Map |
| Halkyn | Wales | Flintshire | Holywell | former religious site | Yes | Ancient 5m-7m, Notable | View On Map |