| The Metronome All-Stars |
| The Metropolitan Music Ensemble |
| The Metros |
| The Metroschifter |
| The Metz Family |
| The MG's |
| The Michael Kane 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 |
| The Mighty Tubadours |
| The Mighty Wah! |
| The Migil 5 |
| The Mike Curb Congregation |
| The Mike Eldred Trio |
| The Mike Flowers Pops |
| The Mike Garson Band |
| The Mike Hennessey Chastet |
| The Mike Owen Woodland Jazz Band |
| The Mike Sammes Singers |
| The Mildred Snitzer Orchestra |
| The Miles |
| The Milestones & Littler Leroy |
| The Military Orchestra of the Soviet Army |
| The Milk Carton Kids |
| The Milkshakes |
| The Millar Brass Ensemble |
| The Millennium |
| The Millennium Dance Party All-Stars |
| The Miller Orchestra |
| The Miller Sisters |
| The Million Dollar Bashers |
| The Million Dollar Quartet |
| The Millionaires |
| The Mills |
| The Mills Brothers |
| The Mind |
| The Mindbenders |
| The Minions |
| The Minister of Soundalikes |
| The Minstrel Singers |
| The Mint |
| The Mint Chicks |
| The Mint Juleps |
| The Minus 5 |
| The Miracle |
| The Miracles |
| The Mischievous Moon Chamber Players |
| The Misfit Toys |
| The Misguided |
| The Missiles of October |
| The Missing Links |
| The Mission |
| The Mission District |
| The Mission UK |
| The Mississippi Children's Choir |
| The Mississippi Mass Choir |
| The Missourians |
