B
| Railway name | Locale | Operating years | Comments |
|---|---|---|---|
| Bay of Quinte Railway | Acquired by CNoR. | ||
| Botwood Railway | central Newfoundland | ?-1956 | Subsidiary of AND. Sold to become GFC. |
| Brantford, Hamilton and Western Railway | |||
| British Columbia Electric Railway | Owned by BCH. Sold to become SRY. | ||
| British Columbia Railway | British Columbia | 1972–2004 | Acquired by CN. |
| Brockville and Ottawa Railway | Acquired by CPR. | ||
| Brockville, Westport and North-Western Railway | Acquired by CNoR. | ||
| Bruce Mines and Algoma Railway | |||
| Buchans Railway | central Newfoundland | Owned by ASARCO. Abandoned. | |
| Buctouche and Moncton Railway | southeastern New Brunswick | Acquired by CNR. | |
| Burlington Northern Manitoba Limited | central Manitoba | 1971–1999 | Subsidiary of BN. Renamed to BNSFM. |
| Bytown and Prescott Railway | 1854–1884 | Leased by CPR for 999 years. Abandoned in 1995. |
Read more about this topic: List Of Defunct Canadian Railways