| The Mistletoe Organ & Chimes |
| The Mistletoe Singers |
| The Misunderstood |
| The Mitch Hansen Band |
| The Mitchell Brothers |
| The Mitchell Trio |
| The Mitchell-Ruff Duo |
| The Mitchell-Ruff Trio |
| The Mitchells |
| The Mix |
| The Mixologists |
| The Mixtures |
| The Mizell Brothers |
| The Mo |
| The Moaners |
| The Mob |
| The Mob Group |
| The Mock Turtles |
| The Modern Jazz Quartet |
| The Modern Lovers |
| The Modernaires |
| The Modernist |
| The Mods |
| The Moffats |
| The Moffatts |
| The Mohawks |
| The Mojo Men |
| The Moldy Peaches |
| The Mom and Dads |
| The Moments |
| The Mommyheads |
| The Mondellos |
| The Monitors |
| The monkees |
| The Monkey Show |
| The Monks |
| The Monks of Doom |
| The Monochrome Set |
| The Monotones |
| The Monoxides |
| The Monroe Brothers |
| The Monroes |
| The MONSTERS |
| The Monsters |
| The Montgomery Brothers |
| The Montmartre Players |
| The Montmartre Strings |
| THE MOOD'S TRIP |
| The Moods Unlimited Orchestra |
| The Moody Blues |
| The Moody Brothers |
| The Moog Cookbook |
| The Moon Maids |
| The Moon Men |
| The Mooney Suzuki |
| The Moonglows |
| The Moonlandingz |
| The Moonlight Players |
| The Moonlight String Orchestra |
| The Moore Brothers |
| The Mopeds |
| The More |
| The Morgan Brothers |
| The Morgan Sisters |
| The Morgan Twins |
| The Morning Dew |
| The Morning Light |
| The Morning Line |
| The Morning Of |
| The Moroccos |
| The Morrie Morrison Orchestra |
| The Morrighan |
| The Morris Brothers |
| The Mose Allison Trio |
| The Mosquitos |
| The Mossie |
| The Most Requested Rhythm Band |
| The Most Serene Republic |
| The Motans |
| The Motards |
