- The Masters Quartet -- The Matinée
- The Matinee Orchestra -- The Mattson 2
- The Mattson 2 -- The Maximum Feeling
- The Maximum Project -- The Mayfield Singers
- The Mayfields -- The McCampbells
- The McCarricks -- The McFadden Brothers
- The McFarlands -- The MDP
- The ME Band -- The Measles
- The Measure -- The Media Says
- The Mediam -- The Medusa Snare
- The Medveds -- The Mekons and Kathy Acker
- The Mel Davians -- The Melloncollies
- The Mellotones -- The Mellow Moods of Jazz