| The Married Monk |
| The Mars McClanes |
| The Mars Native |
| The Mars Retrograde |
| The Mars Volta |
| The Marshal |
| The Marshall Tucker Band |
| The Marshland |
| The Martian |
| The Martians |
| The Martinis |
| The Martins |
| The Marty Paich Dek-Tette |
| The Marty Paich Orchestra |
| The Marty Warburton Band |
| The Marvelettes |
| THE MARVELL BAND |
| The Marvellous Hearts |
| The MarVelous |
| The Marvelous Outsiders |
| The Marvelows |
| The Marveltonez |
| The Marx Brothers |
| The Mary Jane Girls |
| The Mary Nixons |
| The Mary Onettes |
| The Mascot |
| The Mascot Theory |
| The Mash |
| THE MASHENA |
| THE MASHINA |
| The Mask Man |
| The Mask of Tyrant |
| The Maskali |
| The Masked Marauders |
| The Masked Marvel |
| The Masked Rejects |
| The Masked Secrets |
| The Masochists |
| The Masq |
| The Masquerade |
| The Masqueraders |
| The Mass Awakening |
| The Mass Missile |
| The Massacoustics |
| The MasterBakers |
| The Masterminds, Bryan Bravo and Shy-L |
| The MasterPlan |
| The Masters Apprentices |
| The Masters of Music Big Band |
| The Mastersons |
| The Mastersounds |
| The Masticators |
| The Mastlands |
| The Mastropieros |
| The Matadors AV |
| The Matanzas Clan |
| The Match |
| The Matchbox |
| The Matches |
| The Matchup |
| The Mate |
| The Mate feat. IVAN AVDEEV |
| The Mate, Dshingizz |
| The Mate, Kas, Jozygor |
| The Material |
| The Materials |
| The Mates |
| The Math Club |
| The Matinee |
| The Matriarch |
| The Matrices |
| The Matrix |
| The Matrix |
| The Matrixx |
| The Matt Catingub Big Band |
| The Matterhorn Project |
| The Matthew Shane Band |
| The Mattmosphere |
| The Mattoz |
| The Mattson 2 |
| The Matty Malneck Orchestra |
| The Matty Matlock Orchestra |
| THE MATX |
| The MatzaBalls |
| The Matzoh Boys |
| The Mau Mau Chaplains |
| The Maudlin Fee |
| The Maugleez |
| The Mauna Malahini Islanders |
| The Mav |
| The Mavericks |
| The Mavis's |
| The Mavron String Quartet |
| The Mawb |
| The Mawlee Jones Band |
| The Max |
| The Max Hill Band |
| The Maxes |
| The Maxx |
