Thornwood was a station on the Harlem Line of the Metro-North Railroad which served the residents of the hamlet of Thornwood, New York until its closure in 1984. During its existence, the station was one of the most lightly used on the Harlem Line. Prior to closing it had only half the weekday service of the neighboring Hawthorne and Pleasantville stations, and was merely a flag stop for four trains on weekends. When electrification of the Harlem Line between North White Plains and Brewster North in 1984, the station was not upgraded due to sharp track curvature and low ridership precluding such upgrades.
At the time of closing, what few customers Thornwood had were directed to use the Pleasantville station (1 mile north) as a replacement. The former station house, which is located where New York State Route 141 moves from Commerce Street to Franklin Avenue is now occupied by the Thornwood-Hawthorne Chamber of Commerce.