X9
# X9

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.
