New York State Route 56 (NY 56) is a 51.44-mile-long (82.78 km) north–south state highway in eastern St. Lawrence County, New York, in the United States. The southern terminus of the route is at an intersection with NY 3 in the town of Colton. Its northern terminus is at a junction with NY 37 southwest of Massena in the town of Louisville. NY 56 follows the Raquette River for most of its length and serves the village of Potsdam, where it passes by the campus of State University of New York at Potsdam.

New York State Route 37 (NY 37) is a state highway in the North Country of New York in the United States, extending for 127.40 miles (205.03 km) on a west–east axis. The western terminus of the route is at an intersection with U.S. Route 11 (US 11) in Pamelia, Jefferson County. Its eastern terminus is at a junction with US 11, NY 11B, and NY 30 in Malone, Franklin County. In between the termini, NY 37 passes through Ogdensburg and Massena. It is a two-lane, nondivided, full access roadway for most of its entire length, except for portions between Massena and western Franklin County, where the route widens to a four-lane divided highway.