| The Marías |
| The Mariguanas |
| The Mariners |
| The Mark Of Cain |
| The Marketts |
| The Marley Brothers |
| The Marlin Sisters |
| The Marmozets |
| The Maroons |
| The Marphoi Project |
| The Married Monk |
| The Mars Volta |
| The Marshall Tucker Band |
| The Martinis |
| The Martins |
| The Marty Paich Dek-Tette |
| The Marty Paich Orchestra |
| The Marty Warburton Band |
| The Marvelettes |
| The Marvelows |
| The Marx Brothers |
| The Mary Jane Girls |
| The Mary Nixons |
| The Mary Onettes |
| The Mash |
| The Mask of Tyrant |
| The Masked Marauders |
| The Masked Marvel |
| The Masqueraders |
| The Mass Missile |
| The Masters Apprentices |
| The Masters of Music Big Band |
| The Mastersons |
| The Mastersounds |
| The Masticators |
| The Matanzas Clan |
| The Matches |
| The Material |
| The Matinee |
| The Matrix |
| The Matrix |
| The Matt Catingub Big Band |
| The Mattson 2 |
| The Matty Malneck Orchestra |
| The Matty Matlock Orchestra |
| The Mau Mau Chaplains |
| The Maudlin Fee |
| The Mauna Malahini Islanders |
| The Mavericks |
| The Mavis's |
| The Mawb |
| The Max |
| The Maxes |
| The Maxx |
| The Mayan Factor |
| The Mayfield Four |
| The Mayflies USA |
| The Maynard Brothers Band |
| The Maynard Ferguson Big Band |
| The Maytals |
| The McAuley Boys |
| The McCalmans |
| The McClain Sisters |
| The Mcclurg Family Singers |
| The McClymonts |
| The McCormick Brothers |
| The McCoy Tyner Trio |
| The McCoys |
| The McDowell Family |
| The McGregor Project |
| The McGuire Sisters |
| The McKnight Family Choir |
| The McPeak Brothers |
| The MD X-Spress |
| The MDH Band |
| The Mears Brothers |
| The Meas |
| The Meat Purveyors |
| The Meatmen |
| The Mecca |
| The Mediaeval Baebes |
| The Mediam |
| The Medic Droid |
| The Medicine Dolls |
| The Meditations |
| The Meemies |
| The Mega Kids |
| The Megatones |
| The Mekons |
| The Mel Cooleys |
| The Mel-Tones |
| The Melismatics |
| The Mello-Kings |
| The Mello-Larks |
| The Mello Men |
| The Mello-Moods |
| The Mellomen |
| The Mellonheads |
| The Mellow Men |
| The Mellowmen |
