| Overview | |
|---|---|
| Reporting mark | QSR |
| Locale | Quebec |
| Dates of operation | 1900-1903– 1996-2003 |
| Predecessor | East Richelieu Valley Railway 1890-1900; Quebec, Montreal & Southern Railway 1906-1996 |
| Successor | Quebec, Montreal & Southern Railway 1906-1996; Montreal, Maine & Atlantic Railway 2003-2014 |
| Technical | |
| Track gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge |
Quebec Southern Railway (reporting marks QSR) refers to two former railways operated in Quebec from 1900 to 1903 and again from 1996 to 2003. The railway was owned by American railway operators, but most of its existence was under Canadian ownership.