X9 may refer to: X9 (New York City bus) X9, a Metrobus route X-9 Shrike, a missile ASC X9, the ANSI Accredited Standards Committee X9 (ASC X9) Khors Aircompany, former IATA code Former IATA code for WOW air Secret Agent X-9, a comic strip (1934–1996) created by Dashiell Hammett A binary star system located in 47 Tucanae XPeng X9, a battery electric minivan
See also 9X (disambiguation)