W
- Wacos Holdings
- Waskada and North Eastern Railway
- Waterloo Junction Railway
- Welland Railway
- Wellington and Georgian Bay Railway
- Wellington Grey and Bruce Railway
- West River Railroad
- Western Extension Railway
- Western Union Telegraph Company
- Western Vermont Railroad
- Weston, High Park and Toronto Street Railway (Limited)
- Whipple Car Company
- Whitby and Port Perry Extension Railway
- Whitby, Port Perry and Lindsay Railway
- Windsor and Hantsport Railway
- Winnipeg Great Northern Railway
- Winnipeg and Hudson Bay Railway
- Winnipeg and Hudson's Bay Railway and Steamship Company
- Winnipeg Land Company
- Winnipeg and Northern Railway
- Winnipeg Transfer Railway (Limited)
Read more about this topic: List Of Canadian National Railways Companies