The St. Lawrence and Atlantic Railroad, known as St-Laurent et Atlantique Quebec in Canada, is a short-line railway operating between Portland, Maine, on the Atlantic Ocean, and Montreal, Quebec, on the St. Lawrence River. It crosses the Canada–US border at Norton, Vermont, and Stanhope, Quebec, and is owned by short-line operator Genesee & Wyoming.
A St. Lawrence and Atlantic Railroad train in Sherbrooke, Quebec