| M-flo | Tokyo | Japan | 1990s |
| M.O.P. | — | United States | 1990s |
| Macklemore & Ryan Lewis | Seattle | United States | 2000s |
| Madcon | Oslo | — | 1990s |
| Madvillain | — | United States | 2000s |
| Main Attrakionz | — | United States | 2000s |
| Main Source | New York City | — | 1980s |
| Major Lazer | Los Angeles | — | 2000s |
| Malchishnik | — | — | 1990s |
| Malk de Koijn | — | Denmark | 1990s |
| Mantronix | — | — | 1980s |
| Marky Mark and the Funky Bunch | Boston | — | 1990s |
| Marseille (Russian band) | Saint Petersburg | — | 2000s |
| Masta Ace Incorporated | — | United States | 1990s |
| Medina | — | — | 2000s |
| Members Only | Broward County | — | 2010s |
| Mighty Mouth | Seoul | — | 2000s |
| Miss $ | — | — | 2000s |
| Miyagi & Andy Panda | Vladikavkaz | — | 2010s |
| MKTO | Los Angeles | — | 2010s |
| Mm.. Food | — | — | — |
| Mobb | — | — | 2010s |
| Mobb Deep | — | — | 1990s |
| Mori Calliope | — | — | 2020s |
| Music Instructor | — | — | 1990s |
| MXM | — | — | 2010s |