| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | 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 |
| Mitchel Troy | Wales | Monmouthshire | Monmouth | churchyard | Yes | Ancient 4m-5m | View On Map |
| Mobberley | England | Cheshire | Knutsford | churchyard | Yes | Notable | View On Map |
| Moccas – churchyard | England | Herefordshire | Hereford | churchyard | Yes | Ancient 4m-5m | View On Map |
| Moccas Court | England | Herefordshire | Hereford | parkland | Yes | Ancient 5m-7m | View On Map |
| Mochdre | Wales | Powys | Newtown | churchyard | Yes | Ancient 4m-5m | View On Map |
| Molash | England | Kent | Ashford | churchyard | Yes | Ancient 5m-7m, Ancient 7m+, Lost | View On Map |
| Monifieth-The Old Grange | Scotland | Angus | Dundee | garden | No | Notable | View On Map |
| Monketon | England | Kent | Faversham | former religious site | No | Ancient 4m-5m, Ancient 5m-7m, Notable | View On Map |
| Monks Horton (Horton Ct) | England | Kent | Folkestone | churchyard | Yes | Ancient 5m-7m | View On Map |