Names
- Mackinac Transportation Company.1
- Manistee & Grand Rapids Railroad Company.1
- Manistee & Luther Railroad Company.1
- Manistee and Northeastern Railroad.1
- Manistique and Lake Superior Railroad Company.1
- Manistique, Marquette and Northern Railroad Company.1
- Manitou and Pike's Peak Railway Company.1
- Marquette and Southeastern Railway Company.1
- Marquette, Houghton and Ontonagon Railroad Company.1
- Mason and Oceana Railroad Company.1
- Masten, C. C.1
- Menominee River Boom Company.1
- Meyer, C. J. L.1
- Michigan Central Railroad Company.1
- Michigan Electric Railway Company.1
- Michigan Railway Company (1914-1921)1
- Mineral Range Railroad Company.1
- Minneapolis, St. Paul & Sault Ste. Marie Railway Company.1
- Mitchell Bros. Company.1
- Moore, Park & Sharp.1