Names
- Moore, Park & Sharp.1
- Morgenthau, Henry, 1856-1946.1
- Morgenthau, Henry, 1891-1
- Moulton, Vern, 1880-1
- Mount Washington Railway Company.1
- Munising Railway Company.1
- Nahma & Northern Railroad.1
- New York Central Railroad Company.1
- New York Central and Hudson River Railroad Company.1
- Newhall, R. Frank, 1874-1
- Nicholson, Walter G.1
- Nixon, Richard M. (Richard Milhous), 1913-1
- Nixon, Richard M. (Richard Milhous), 1913-1994.1
- Norfolk and Western Railway Company.1
- Norris, Louis William, 1906-1
- North Park Railway Company.1
- North, Walter Harper, 1871-1952.1
- Northern Michigan Traction Company.1
- Nowicki, Leo J., 1904-1
- Ohio and Michigan Sand and Gravel Company.1