The defunct railroads of North America regrouped several railroads in Canada, Mexico, and the United States. The following is a list of the past railroad companies.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"Toledo, Saginaw & Mackinaw Railway". TrainWeb. American Passenger Rail Heritage Foundation. Retrieved 18 May 2017.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"Detroit, Toledo & Milwaukee Railroad". RRHX, Michigan's Internet Railroad History Museum. MichiganRailroads.com. Archived from the original on 14 April 2016. Retrieved 18 May 2017.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"History of The San Antonio, Fredericksburg & Northern Railway". Texas Transportation Museum. Retrieved 31 May 2016.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.
^"Toledo, Saginaw & Mackinaw Railway". TrainWeb. American Passenger Rail Heritage Foundation. Retrieved 18 May 2017.
^"Toledo, Saginaw & Mackinaw Railway". TrainWeb. American Passenger Rail Heritage Foundation. Retrieved 18 May 2017.
^"About us". Port Terminal Railroad Association. Retrieved 19 May 2015.