| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | 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 |
| Minnigaff | Scotland | Dumfries and Galloway | Newton Stewart | churchyard | Yes | Ancient 4m-5m | View On Map |
| Minstead | England | Hampshire | Southampton | churchyard | Yes | Ancient 4m-5m | View On Map |
| Minsterworth – churchyard | England | Gloucestershire | Gloucester | churchyard | Yes | Ancient 4m-5m, Ancient 5m-7m | View On Map |
| Minsterworth – River Severn | England | Gloucestershire | Gloucester | footpath/road | Yes | Ancient 4m-5m | View On Map |
| Minterne Magna | England | Dorset | Cerne Abbas | churchyard | Yes | Notable | View On Map |
| Minto – old churchyard | Scotland | Scottish Borders | Hawick | churchyard | Yes | Notable | View On Map |