C
- Canada Air Line Railway
- Canada Atlantic Railway
- Canada Atlantic Transit Company
- Canada Atlantic Transit Company of U.S.
- Canada Eastern Railway
- Canada, New Brunswick and Nova Scotia Railway
- Canadian Airways
- Canadian Express Company
- Canadian Government Merchant Marine
- Canadian Government Railways
- Canadian Government Railways Employees' Relief and Insurance Association
- Canadian - Minnesota Bridge Company
- Canadian National Electric Railways
- Canadian National Express Company
- Canadian National Hotels
- Canadian National Land Settlement Association
- Canadian National Lines - Niagara Frontier - New York
- Canadian National Railway
- Canadian National Railways - Eastern Lines
- Canadian National Railways (France)
- Canadian National Railways Pension Fund - 1929
- Canadian National Railways Pension Fund - 1935
- Canadian National Railways Radio
- Canadian National Railways Securities Trust
- Canadian National Railways Trust Company
- Canadian National Realties
- Canadian National Rolling Stock
- Canadian National Steamship Company
- Canadian National Telegraph Company
- Canadian National Transfer Company
- Canadian National Transportation
- Canadian National (West Indies) Steamships
- Canadian Northern Alberta Railway
- Canadian Northern Branch Lines Company
- Canadian Northern Coal and Ore Dock Company
- Canadian Northern Consolidated Railways
- Canadian Northern Express Company
- Canadian Northern Manitoba Railway
- Canadian Northern Montreal Tunnel and Terminal Company
- Canadian Northern Ontario Railway
- Canadian Northern Pacific Railway
- Canadian Northern Quebec Railway
- Canadian Northern Railway Arbitration Award
- Canadian Northern Railway
- Canadian Northern Railway Express Company
- Canadian Northern Realties
- Canadian Northern Rolling Stock
- Canadian Northern Saskatchewan Railway
- Canadian Northern Steamships
- Canadian Northern System Terminals (Limited)
- Canadian Northern Telegraph Company
- Canadian Northern Transfer Company
- Canadian Northern Western Railway
- Canadian Yukon Railway
- Cannar Oils
- Canso and Louisburg Railway
- Cape Breton Railway, Coal and Iron Company
- Cape Breton Railway
- Cape Breton Railway Extension Company
- Caraquet and Gulf Shore Railway
- Caraquet Railway
- Carrillon and Grenville Railway
- Centmont Corporation
- Central Canada Express Company
- Central Canada Railway
- Central Counties Railway
- Central Ontario Railway
- Central Railway Limited, (N.S.)
- Central Vermont Airways Incorporated
- Central Vermont Railroad
- Central Vermont Railway
- Central Vermont Railway Incorporated
- Central Vermont Terminal Incorporated
- Central Vermont Transit Corporation
- Central Vermont Transportation Company
- Central Vermont Warehouse Incorporated
- Champlain and Connecticut River Railroad
- Champlain and St. Lawrence Railroad
- Champlain and St. Lawrence Railroad (New York)
- Charlottetown Hotel
- Chateauguay and Northern Railway
- Chateau Laurier Hotel
- Chatham Branch Railway
- Chatham Railway
- Cheney, Rice and Company
- Chicago, Detroit and Canada Grand Trunk Junction Railroad
- Chicago and Grand Trunk Railway
- Chicago, Kalamazoo and Saginaw Railway
- Chicago and Kalamazoo Terminal Railroad
- Chicago Lake County Railway
- Chicago and Lake Huron Railroad
- Chicago, New York and Boston Refrigerator Company
- Chicago and North Eastern Railroad
- Chicago and Southern Railroad
- Chicago and State Line Extension Railway
- Chicago and State Line Railway
- Chicago and Western Indiana Belt Railway
- Chicago and Western Indiana Railroad
- Cincinnati, Saginaw and Mackinaw Railroad
- City and Suburban Electric Railway
- Clarke Steamship Company
- Coast Railway of Nova Scotia
- Cobourg, Blairton and Marmora Railway and Mining Company
- Cobourg, Peterborough and Marmora Railway and Mining Company
- Cobourg and Peterborough Railway
- Cobourg Railroad
- Company of Proprietors of the Champlain and St. Lawrence Railroad
- Consolidated Land Corporation
- Consolidated Railroad of Vermont
- Continental Realty and Holding Company
- Coteau and Province Line Railway and Bridge Company
- Crosby Transportation Company
Read more about this topic: List Of Canadian National Railways Companies