- Madeja, Kevin (Engineer) (1)
- Madison Association of Commerce (1)
- Madoz, Pascual, 1806-1870 (1)
- Mae, Minda (Guest) (1)
- Maffi, Luisa (2)
- Magann, Arthur S (2)
- Maggs Brothers (dealer) (3)
- Magner, Thomas F. (1)
- Magney and Tusler, Inc. (Architect) (20)
- Magney and Tusler, Inc. (Architect, Engineer) (26)
- Magrath, C. Peter (7)
- Mahler, Blanche (1)
- Mahoney, Michael S. (1)
- Mahoney, Thomas (1)
- Mahony, F. E (2)
- Maile, Michael (executive director, Smoke Free 2000 Coalition) (1)
- Mailloux, Steve (1)
- Mailloux, Steven (2)
- Main, Hubert P. (Hubert Platt), 1839-1925 (2)
- Maitland, A. Gibb (Andrew Gibb) (1)
