NY 37A was an alternate route of NY 37 between Ogdensburg and Waddington. It was assigned as part of the 1930 renumbering of state highways in New York to what is now NY 37 between the two locations. At the time, NY 37 was routed on Van Rensselaer Road.
NY 37A was an alternate route for NY 37 between Ogdensburg and Waddington. It was assigned as part of a highway renumbering in 1930 that now designates NY 37 as the main route between those two locations. At the time, NY 37 followed Van Rensselaer Road.