List of United Kingdom MPs: M
Following is an incomplete list of past and present Members of Parliament (MPs) of the United Kingdom whose surnames begin with M. The dates in parentheses are the periods for which they were MPs.
- John MacGregor
- Andrew MacKay
- Angus MacNeil
- John McAllion
- Tommy McAvoy
- Steve McCabe
- Christine McCafferty
- Ian McCartney
- Siobhain McDonagh
- Calum MacDonald
- Malcolm MacDonald
- Ramsay MacDonald
- John McDonnell
- John William MacDougall
- John McFall
- Anne McGuire
- Shona McIsaac
- Frederick Coleridge Mackarness
- Ann McKechin
- Rosemary McKenna
- Halford John Mackinder
- Andrew Mackinlay
- John Scott Maclay, 1st Viscount Muirshiel
- David Maclean
- Donald Maclean
- Fitzroy Maclean
- Neil Maclean
- Henry McLeish
- Robert Maclennan, Baron Maclennan of Rogart
- Iain Macleod
- Frank McManus
- Gordon McMaster
- Maurice Macmillan
- Kevin McNamara
- Tony McNulty
- Denis MacShane
- Fiona Mactaggart
- Tony McWalter
- John David McWilliam
- Diana Maddock
- David Madel
- Bryan Magee
- Ken Maginnis
- Frank Maguire
- Khalid Mahmood
- Alice Mahon
- Anne Main
- John Major
- Ian Malcolm
- Shahid Malik
- Humfrey Malins
- Judy Mallaber
- Seamus Mallon
- Cecil L'Estrange Malone
- John Mann
- Leah Manning
- Reginald Manningham-Buller, 1st Viscount Dilhorne
- John Maples
- John Marek
- David Margesson, 1st Viscount Margesson
- Ernest Marples
- Rob Marris
- Gordon Marsden
- Paul Marsden
- Arthur Harold Marshall (1910–1918, 1922–1923)
- David Marshall
- Jim Marshall
- Bob Marshall-Andrews
- Michael Martin
- Eric Martlew
- Glyn Mason, 2nd Baron Blackford
- Roy Mason
- Charles Frederick Gurney Masterman
- Michael Mates
- Matthew Decker
- Angus Maude
- Francis Maude
- Reginald Maudling
- Thomas Mauleverer (17th century Long Parliament)
- Brian Mawhinney
- James Maxton
- John Maxton, Baron Maxton
- David Maxwell Fyfe, 1st Earl of Kilmuir
- Robert Maxwell
- Theresa May
- Christopher Mayhew
- Patrick Mayhew
- Joan Maynard
- Kerry McCarthy
- Sarah McCarthy-Fry
- Robert McCartney
- William McCrea
- Alasdair McDonnell
- Pat McFadden
- James McGovern
- Eddie McGrady
- Martin McGuinness
- Anne McIntosh
- Reginald McKenna
- Patrick McLoughlin
- Michael McNair-Wilson
- Hector McNeil
- Ronald McNeill, 1st Baron Cushendun
- Thomas McNally, Baron McNally
- Michael Meacher
- Alan Meale
- David Mellor
- Patrick Mercer
- Piers Merchant
- Gillian Merron
- Philip Metcalfe 1790 - 1796 and 1796 onwards
- Anthony Meyer
- Alun Michael
- Bill Michie
- Ray Michie
- Ian Mikardo
- Alan Milburn
- Charles William Miles MP for Malmesbury (1882–1885)
- John William Miles MP for Bristol (1868)
- Philip John Miles MP for Westbury (1820–1826), Corfe Castle (1829–1832) and Bristol (1835–1837)
- Sir Philip John William Miles, 2nd Baronet MP for East Somerset (1878–1885)
- Philip William Skinner Miles MP for Bristol (1837–1852)
- Sir William Miles, 1st Baronet MP for Chippenham (1818–1820), New Romney (1830–1832) and East Somerset (1834–1865)
- David Miliband
- Ed Miliband
- Bruce Millan
- Andrew Miller
- Maria Miller
- Stephen Milligan
- Ernest Millington
- James Milner, 1st Baron Milner of Leeds
- Anne Milton
- Andrew Mitchell
- Austin Mitchell
- William Mitchell-Thomson, 1st Baron Selsdon
- Anne Moffat
- Laura Moffatt
- Chris Mole
- James Molyneaux
- Walter Monckton, 1st Viscount Monckton of Brenchley
- John George Dodson, 1st Baron Monk Bretton
- Hector Munro, MP for Inverness Burghs 1868–1802
- Hector Monro, MP for Dumfries 1964–1997
- Edwin Samuel Montagu
- Samuel Montagu, 1st Baron Swaythling
- Fergus Montgomery
- Madeleine Moon
- Lewis Moonie
- John Moore, Baron Moore of Lower Marsh
- Michael Moore
- Newton Moore
- John Cuthbert Moore-Brabazon, 1st Baron Brabazon of Tara
- Margaret Moran
- Jessica Morden
- E. D. Morel
- Alasdair Morgan
- Julie Morgan
- Rhodri Morgan
- William Morice
- Elliot Morley
- John Morley, 1st Viscount Morley of Blackburn
- Charles Morris
- Estelle Morris
- John Morris
- Michael Wolfgang Laurence Morris
- Herbert Morrison
- William Morrison, 1st Viscount Dunrossil
- Oswald Mosley
- Malcolm Moss
- William Arthur Mount, 1st Baronet
- William George Mount
- Kali Mountford
- Mo Mowlam
- George Mudie
- H.T. Muggeridge
- Greg Mulholland
- Frederick Mulley
- Chris Mullin
- David Mundell
- Meg Munn
- Tessa Munt
- Conor Murphy
- Denis Murphy
- Jim Murphy
- Paul Murphy
- Andrew Murrison
- [Esther McVey]]