- Marriott, H. L. (Hugh Leslie), 1900-19831
- Mayo Aero Medical Unit, author.7
- McAlear, Henry, artist1
- McCarthy, Charles L.1
- McCarthy, Charles L., author7
- McMinn, John H., author1
- McPherson, Darrell G., author1
- Metcalf, Harold, author1
- Mihalich, Joseph J., author1
- Miller, Everett B. (Everett Brunner), 1917-1995, author1
- Mills, A. K., author1
- Minnesota. Office of Civil Defense, author1
- Misonō, Keisuke, 1912-1995, author1
- Mjölnir, 1901-1980, artist1
- Molnar, G. W. (George W.)1
- Morgan, Edward J., author1
- Mountin, Joseph W. (Joseph Walter), 1891-19521
- Mulrennan, John A., author1
- Munn, James F., author1
- Münch-Khe, W. (Willi), 1885-1960, artist1