- Luffman, J. (John), 1756-1846 (Geographer)1
- M.J. Green1
- Mac,, H.A.1
- Macomb, Alexander, 1782-1841 (Topographer)1
- Maedel, A. (Adolph) (Engraver)1
- Magnus, Charles (publisher)1
- Marshall, R. B. (Robert Bradford), 1867-1949 (Geographer)1
- Mayer, Ferd.1
- McClellan, George B. (George Brinton), 1826-18851
- McClellan, George Brinton 1826-18851
- McCollough, E.H.1
- McDowell, H. (publisher)1
- McNair, Edward C.1
- McNair, Robert E. (Robert Evander), 1923-2007.1
- McNally, Francis (Compiler)1
- McRae, John, 1793-18801
- Melish, John, 1771-18221
- Melish, John, 1771-1822 (cartographer)1
- Mercator, Gerhard, 1512-15941
- Miller, D.B. (Engineer)1