- M.J. Green1
- Macomb, Alexander, 1782-1841 (Topographer)1
- Maedel, A. (Adolph) (Engraver)1
- Marshall, R. B. (Robert Bradford), 1867-1949 (Geographer)1
- McClellan, George B. (George Brinton), 1826-18851
- McClellan, George Brinton 1826-18851
- McNair, Edward C.1
- McNally, Francis (Compiler)1
- McRae, John, 1793-18801
- Melish, John, 1771-18221
- Miller, D.B. (Engineer)1
- Mills, Robert 1781-18551
- Miss Dromgoole Ham1
- Mitchell, S. Augustus (Samuel Augustus) 1792-18681
- Mitchell, S. Augustus (Samuel Augustus), 1792-1868 (Publisher)1
- Mittwede, Steven K. 1959-1
- Moll, Herman (Geographer)1
- Monteith, James1
- Morden, Robert, approximately 1650-17031
- Morse, Sidney E. (Sidney Edwards) 1794-18711