The Plattsburgh and Montreal Railroad was a railway company that operated in the state of New York in the mid-19th century. The company completed a 23-mile (37 km) line from Plattsburgh, New York, to the Canadian border north of Mooers, New York, in 1852. The company was subsequently reorganized as the Montreal and Plattsburgh Railroad in 1868 and consolidated with two other companies in 1873 to form the New York and Canada Railroad. The southern half of the company's line is part of the Canadian Pacific Kansas City's Canadian Subdivision; the Delaware and Hudson Railway abandoned the rest in 1925.
