- Millisle
- Milford on Sea
- Milford Haven
- Milford
- Mildenhall
- Milborne Port
- Midsomer Norton
- Midhurst
- Middlewich
- Middleton
- Middlestown
- Middlesbrough
- Mid Calder
- Mexborough
- Mevagissey
- Metheringham
- Messingham
- Merthyr Tydfil
- Meopham
- Menston
- Mendip
- Menai Bridge
- Melton Mowbray
- Meltham Mills
- Meltham
- Melksham
- Melbourne
- Melbourn
- Measham
- Mayfield
- Maybole
- Maulden
- Mauchline
- Mattishall
- Matlock
- Maryport
- Martock
- Martham
- Marston Moretaine
- Marske-by-the-Sea
- Marshfield
- Marsden
- Marple
- Marlow
- Marlborough
- Markyate
- Marks Tey
- Markinch
- Markfield
- Market Weighton
- Market Rasen
- Market Lavington
- Market Harborough
- Market Drayton
- Market Deeping
- Market Bosworth
- Margate
- Marden
- Marchwood
- March
- Manston
- Mansfield Woodhouse
- Mansfield
- Manningtree
- Mangotsfield
- Malton
- Maltby
- Malmesbury
- Maldon
- Maidstone
- Maidenhead
- Maidenbower
- Magor
- Maghull
- Magherafelt
- Maghera
- Maesteg
- Machynlleth
- Machen
- Macduff
- Macclesfield
- Lytham St Annes
- Lytchett Matravers
- Lyneham
- Lyndhurst
- Lymm
- Lymington
- Lyminge
- Lyme Regis
- Lydney
- Lydd
- Lydbrook
- Lutterworth
- Luton
- Lundin Links
- Ludlow
- Luddenden Foot
- Lowestoft
- Lower Earley
- Lowdham
