| The Megatones |
| The Mekons |
| The Mel Cooleys |
| The Mel-Tones |
| The Melismatics |
| The Mello Men |
| The Mello-Kings |
| The Mello-Larks |
| The Mello-Moods |
| The Mellomen |
| The Mellowmen |
| The Mellows |
| The Melodians |
| The Melomen |
| The Melschrino Strings |
| The Members |
| The Membranes |
| The Memphis All Stars |
| The Memphis Boys |
| The Memphis Horns |
| The Memphis Symphony Orchestra |
| The Men |
| The Men of the Deeps |
| The Men They Couldn't Hang |
| The Mendes Brothers |
| The Mendoza Line |
| The Mentors |
| The Menzingers |
| The Mercenaries |
| The Meridian |
| The Merry Macs |
| The Merry Melody Singers |
| The Merry Yuletide Singers |
| The merrymen |
| The Merrywoode Singers |
| The Merseybeats |
| The Merton Parkas |
| The Mescaleroes |
| The Mess |
| The Messengers |
| The Messengers Of God |
| The Meteors |
| The Meters |
| The Methadones |
| The Method Actors |
| The Methods |
| The Metro Stompers |
| The Metronome All-Stars |
| The Metropolitan Music Ensemble |
| The Metros |
| The Metroschifter |
| The Metz Family |
| The MG's |
| The MGM Studio Orchestra & Chorus |
| The Michael Gungor Band |
| The Michael O'Neill Quintet |
| The Michael Zager Band |
| The Mick Lloyd Connection |
| The Micragirls |
| The Micronauts |
| The Microphones |
| The Mid-Summer Classic |
| The Middle East |
| The Midi Mafia |
| The Midiri Brothers |
| The Midnight |
| The Midnight Ramblers |
| The Midnighters |
| The Midway State |
| The Midwest Winds |
| The Mighty Blue Kings |
| The Mighty Bop |
| The Mighty Clouds of Joy |
| The Mighty Diamonds |
| The Mighty Echoes |
| The Mighty Hannibal |
| The Mighty High Choir |
| The Mighty Lemon Drops |
| The Mighty Marvelows |
| The Mighty Mighty Bosstones |
