Islip Station is a station on the Montauk Branch of the Long Island Rail Road, off NY 111 (Islip Avenue) and Nassau Avenue, north of Suffolk CR 50 (Union Boulevard), and south of Moffitt Boulevard in Islip, New York, but the official description of its location isn't as precise. The MTA describes the station as being located at the same address, but also between Sunrise Highway (NY 27) and NY 27A, and does not include Nassau Avenue.