| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Mid Lavant | England | Sussex - West | Chichester | churchyard | Yes | Ancient 7m+ | View On Map |
| Middle Chinnock | England | Somerset | Crewkerne | churchyard | Yes | Ancient 4m-5m | View On Map |
| Middle Winterslow – Lower Noads Copse | England | Hampshire | Salisbury | woodland | No | Notable | View On Map |
| Middle Winterslow – Upper Noads Copse | England | Hampshire | Salisbury | woodland | Yes | Ancient 4m-5m | View On Map |
| Middlehope – Preens Barn | England | Shropshire | Church Stretton | footpath/road | Yes | Ancient 4m-5m | View On Map |
| Middlehope – private location | England | Shropshire | Church Stretton | boundary | No | Ancient 5m-7m | View On Map |
| Middlehope – Upper House Farm | England | Shropshire | Church Stretton | footpath/road | Yes | Ancient 4m-5m, Ancient 5m-7m | View On Map |
| Middleton Court | England | Shropshire | Ludlow | historic site | No | Ancient 4m-5m | View On Map |
| Middleton Scriven | England | Shropshire | Bridgnorth | former religious site | No | Ancient 7m+ | View On Map |
| Midgham | England | Berkshire | Newbury | churchyard | Yes | Ancient 5m-7m | View On Map |
| Mier | Spain | Asturias | Cangas de Onis | churchyard | Yes | Ancient 5m-7m | View On Map |
| Milborne St Andrew | England | Dorset | Dorchester | churchyard | Yes | Notable | View On Map |
| Milford House | Ireland | Co. Mayo | Kilmaine | estate | No | Ancient 4m-5m | View On Map |
| Milford on Sea | England | Hampshire | Bournemouth | churchyard | Yes | Notable | View On Map |
| Mill Hill | England | Greater London | London | estate | No | Lost | View On Map |
| Millvale | Ireland | Co. Wicklow | Wicklow | footpath/road | Yes | Ancient 4m-5m | View On Map |
| Milson | England | Shropshire | Tenbury Wells | churchyard | Yes | Ancient 5m-7m | View On Map |
| Milstead | England | Kent | Sittingbourne | churchyard | Yes | Notable | View On Map |
| Milton Abbas – Pidgeon House Plantation | England | Dorset | Blandford Forum | woodland | Yes | Notable | View On Map |
| Minehead | England | Somerset | Minehead | churchyard | Yes | Notable | View On Map |