T
- Temiscouata Railway
- Terminal Warehouse and Cartage Company
- Terminal Warehouse Registered
- Terminal Warehouse Company
- Thousand Islands Railway
- Terra Transport
- Thunder Bay Colonization Railway
- Toledo and Ottawa Beach Railway
- Toledo Railway and Terminal Company
- Toledo, Saginaw and Mackinaw Railroad
- Toledo, Saginaw and Muskegon Railway
- Toledo Terminal Railroad
- Toronto Belt Line Railway
- Toronto Dwellings
- Toronto Eastern Railway
- Toronto and Goderich Railway
- Toronto and Guelph Railway
- Toronto and Hamilton Railway
- Toronto, Niagara and Western Railway
- Toronto and Nipissing Eastern Extension Railway
- Toronto and Nipissing Railway
- Toronto and Ottawa Railway
- Toronto - Peterborough Transport Company
- Toronto, Simcoe and Lake Huron Railroad Union Company
- Toronto, Simcoe and Muskoka Junction Railway
- Toronto Suburban Railway
- Toronto Suburban Street Railway
- Toronto Terminals Railway
- Transcontinental Townsite Company
Read more about this topic: List Of Canadian National Railways Companies