Names
- Manitou and Pike's Peak Railway Company.1
- Manny, Frank Addison, 1868-1954.1
- Manufacturers' Railway Company.1
- Marquette and Southeastern Railway Company.1
- Marquette, Houghton and Ontonagon Railroad Company.1
- Martin, H. B.1
- Mason and Oceana Railroad Company.1
- Masten, C. C.1
- Mayo-Smith, Richmond, 1854-1901.1
- Mead, Edwin Doak, 1849-1937.1
- Michigan Central Railroad Company.1
- Michigan Electric Railway Company.1
- Michigan Railway Company (1914-1921)1
- Michigan. Board of State Tax Commissioners.1
- Mineral Range Railroad Company.1
- Minneapolis & St. Louis Railroad.1
- Missouri Pacific Railroad Company.1
- Missouri, Kansas and Texas Railway Company.1
- Mitchell Bros. Company.1
- Moore, Park & Sharp.1