| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Northington – Lawn Copse | England | Hampshire | Winchester | planted avenue | No | Notable | View On Map |
| Northington – old church site | England | Hampshire | Winchester | former religious site | Yes | Ancient 4m-5m, Notable | View On Map |
| Northop | Wales | Flintshire | Mold | churchyard | Yes | Lost | View On Map |
| Norton | Wales | Powys | Presteigne | churchyard | Yes | Ancient 5m-7m, Notable | View On Map |
| Norton Canon | England | Herefordshire | Hereford | churchyard | Yes | Ancient 4m-5m, Notable | View On Map |
| Norton Canon – Hyatt Sarnesfield Farm | England | Herefordshire | Hereford | footpath/road | No | Notable | View On Map |
| Norton Court | England | Kent | Sittingbourne | churchyard | Yes | Ancient 7m+ | View On Map |
| Norton Lindsey | England | Warwickshire | Warwick | churchyard | Yes | Notable | View On Map |
| Norton Malreward | England | Somerset | Bristol | churchyard | Yes | Ancient 4m-5m | View On Map |
| Norton sub Hamdon | England | Somerset | Yeovil | churchyard | Yes | Ancient 4m-5m | View On Map |
| Norwood Green | England | Greater London | London | churchyard | Yes | Lost | View On Map |
| Notgrove | England | Gloucestershire | Cheltenham | churchyard | Yes | Lost | View On Map |
| Notre- Dame-de- Courson | France | Calvados - Normandie | Lisieux | churchyard | Yes | Ancient 4m-5m | View On Map |
| Nunney | England | Somerset | Frome | field | No | Lost | View On Map |
| Nupend Wood | England | Herefordshire | Hereford | woodland | Yes | Notable | View On Map |
| Nurstead | England | Kent | Gravesend | churchyard | Yes | Lost | View On Map |
| Nuthall | England | Nottinghamshire | Nottingham | churchyard | Yes | Notable | View On Map |
| Nutley Down | England | Hampshire | Basingstoke | woodland | No | Ancient 4m-5m, Ancient 5m-7m | View On Map |
| Oakclose Plantation Morestead | England | Hampshire | Winchester | boundary | Yes | Notable | View On Map |
| Oakhills Coppice SSSI – Long Crichel | England | Dorset | Blandford Forum | woodland | No | Ancient 5m-7m | View On Map |