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- Graham Maby (Joe Jackson, They Might Be Giants, Natalie Merchant)
- Bill MacCormick (Matching Mole)
- James MacDonough (Iced Earth, Megadeth)
- Ian MacKaye (Teen Idles)
- Steve Mackey (Pulp)
- Lawrie MacMillan (Stiltskin, Ray Wilson)
- Mickey Madden (Maroon 5)
- Matt Maginn (Cursive)
- Tony Maimone (Pere Ubu, They Might Be Giants)
- Dan Maines (Clutch)
- Sean Malone (Cynic, Gordian Knot)
- Olivier Manchion (Ulan Bator, Permanent Fatal Error)
- Roger Manganelli (Less Than Jake)
- Aimee Mann (Til Tuesday)
- Michael Manring
- Luís Mariutti (Shaaman, Angra)
- Brian Marshall (Creed, Alter Bridge)
- Jeremy Marshall (Cold)
- Ryan Martinie (Mudvayne)
- Nick Massi (The Four Seasons)
- Glen Matlock (Sex Pistols)
- Jeff Matz (High on Fire)
- Joe B. Mauldin (The Crickets)
- Chris Maurer (Suburban Legends)
- John Maurer (Social Distortion)
- Ricky Maymi (The Brian Jonestown Massacre)
- Gerry McAvoy (Rory Gallagher)
- Christian McBride
- Paul McCartney (The Beatles, Wings)
- Jason McCaslin (Sum 41)
- Mark McClelland (Snow Patrol)
- Andy McCluskey (Orchestral Manoeuvres in the Dark)
- Drew McConnell (Babyshambles)
- Tim McCord (Evanescence)
- Danny McCormack (The Wildhearts, The Yo-Yos)
- Jeremy McCoy
- Chris McCusker
- Hugh McDonald (Bon Jovi)
- Alan McGeoch (Red Hot Chilli Pipers)
- Ron McGovney (Metallica)
- Paul 'Guigsy' McGuigan (Oasis)
- Tom McGuinness (Manfred Mann, McGuinness Flint)
- Duff McKagan (Guns N' Roses, Velvet Revolver, Loaded, Neurotic Outsiders, Fastbacks)
- Allen McKenzie (FireHouse)
- Ali McMordie (Stiff Little Fingers)
- Dugan McNeill (Chameleon)
- John McVie (Fleetwood Mac)
- Randy Meisner (The Eagles, Poco)
- Justin Meldal-Johnsen (Beck)
- Nate Mendel (Sunny Day Real Estate, Foo Fighters)
- Martin Mendez (Opeth)
- Marco Mendoza (Thin Lizzy, Whitesnake)
- Mark Mendoza (Twisted Sister)
- Buwi Meneses (Parokya ni Edgar)
- Dave Meros (Spock's Beard)
- Robbie Merrill (Godsmack)
- Johnny Lee Middleton (Savatage)
- Marcus Miller (Miles Davis, David Sanborn)
- Mike Mills (R.E.M.)
- Roger Miret (Agnostic Front, Madball)
- Naoshi Mizuta (The Star Onions)
- Gordon Moakes (Bloc Party)
- Ole Moe (Immortal, Aura Noir)
- A.J. Mogis (Criteria)
- Billy Mohler (Jimmy Chamberlin Complex, The Calling)
- John Mole (Colosseum II, Gary Moore)
- John Monte (M.O.D., Mind Funk, Ministry, Revolting Cocks, Human Waste Project)
- Monk Montgomery
- Craig Montoya (Everclear)
- Alex Moore
- R. Stevie Moore
- Tom Morello (Street Sweeper Social Club)
- Rockette Morton (Captain Beefheart, Mallard, Mark Boston)
- Keith Moseley (The String Cheese Incident)
- Peter Mosely (Inspection 12, Yellowcard)
- Robin Moulder (TCR, Jack Off Jill)
- Colin Moulding (XTC)
- Gary Mounfield (The Stone Roses, Primal Scream)
- John Moyer (Disturbed)
- John Munson (Semisonic)
- Derrick Murdock (The Tonight Show with Jay Leno)
- Chris Murphy (Sloan)
- Dee Murray (Elton John)
- George Murray (David Bowie)
- John Myung (Dream Theater)
Read more about this topic: List Of Bass Guitarists