- Michler, N. (Nathaniel), 1827-18812
- Minn Saint Louis County Highway Dept.2
- Minnesota Forest Service2
- Minnesota. Division of Waters2
- Minnesota. State Drainage Commission.2
- Mitchell, John, 1711-17682
- Mogg, Edward2
- Morden, Robert, -17032
- Mossler, J.H2
- Mulford, John C.2
- National Cartographic Center (U.S.)2
- Nelson, Willis H. (Willis Howard), 1920-20102
- Nemitz, M.2
- New York (State). State Engineer and Surveyor2
- Nichols, J. A.2
- Nicollet, J. N. (Joseph Nicolas), 1786-18432
- North-Western Provinces (India). Superintendent, Grand Trunk Road2
- North-Western Provinces (India). Superintendent, Grand Trunk Road.2
- Olmsted, Frederick Law, 1822-19032
- Ontario. Department of Crown Lands2