- Lucas, Fielding, Jr., 1781-1854 (cartographer) (publisher)1
- Luxton, J. 1
- MacDermid, James G., 1875-1960 1
- MacDonald, C. W. 1
- MacPherson, Duncan E. 1
- Maetzold, E. F. 1
- Magnus, Charles (publisher)1
- Manning, R. W. 1
- Martin, John1
- Martin, John Z. 1
- Mayer, Fred W. 1
- McCarron, Chas. R (Charles R.), 1891-1919 1
- McCollum, E. E.1
- McConnell, Geo. B. (George Burnham), 1894-1982 1
- McDowell, H. (publisher)1
- McHugh, Jimmy, 1894-19691
- McKenna, William J., 1881-1950 1
- McNaughton, Charles1
- Melish, John, 1771-18221
- Melish, John, 1771-1822 (cartographer)1