- Mario P. Fiore Sr.
- Mario Parras
- Mario Sixstring
- Mario Tramaine
- Marion Peterson
- Marion Rutledge
- Marion Sumner
- Marion Worth
- Marion Z. "Pee Wee" Adams
- Marisa Anderson
- Marisa Yeaman
- Marja-Liisa Callaghan
- Marjorie Kelting
- Marjorie Michelle Rose
- Mark Abbott
- Mark Adam Miller
- Mark Ameson
- Mark and Ann Savoy
- Mark Anthony Casamento
- Mark Austin
- Mark Beynon
- Mark Brine
- Mark Brown
- Mark Brumfield
- Mark Bryson
- Mark Burroughs
- Mark Burroughs
- Mark Cameron
- Mark Campbell
- Mark Casstevens
- Mark Catacchia
- Mark Chesnutt
- Mark Claypoole
- Mark Collie
- Mark Collins
- Mark Cooke
- Mark Daly
- Mark David Manders
- Mark Davis
- Mark Dawson
- Mark Delaney
- Mark Evans
- Mark Fain
- Mark Farris
- Mark Fields
- Mark Fosson
- Mark Germino
- Mark Gray
- Mark Hackley
- Mark Hackley
- Mark Henley
- Mark Holt
- Mark Houser & Bluegrass Drive
- Mark Howard
- Mark Hughey
- Mark Huhta
- Mark Insley
- Mark Jevicky
- Mark Jones