Ix
IX may refer to:

IX, the Roman numeral for the number 9IX or Ix may also refer to:

Arts and entertainment
Music
IX (...And You Will Know Us by the Trail of Dead album)
IX (Bulldozer album)
IX (Corrosion of Conformity album)
IX, used as a logo by the band Ice Nine Kills
IX, the first song off of Trivium's album What the Dead Men Say

Literature
iX (magazine), a German monthly computer magazine
Ix (Dune), a fictional planet in Frank Herbert's Dune
Ix (Oz), a fictional country in Queen Zixi of Ix by L. Frank Baum
Ix, the central governmental supercomputer in Omikron: The Nomad Soul
Ix, the nickname of Ford Prefect from the Hitchhiker's Guide to the Galaxy by Douglas Adams

Other media
Ix, the primary antagonist of Sonic Chronicles: The Dark Brotherhood
IX, a map in zombies mode (chaos storyline) of Call of Duty Black Ops 4
IX, an entity from the video game Destiny 2

Other uses
IxD, interaction design
Internet exchange point
Air India Express (IATA airline code IX), budget arm of Air India
Noveschi, an oligarchy ruling Siena, Italy during the late Middle Ages
Ix, the 14th day in the Tzolk'in calendar
Ix Chel, Maya jaguar goddess
Ix Ek' Naah, Maya queen
defunct Flandre Air (IATA airline code IX)
IX, the United States Navy hull classification for an unclassified miscellaneous vessel
iX, the short name of iXsystems
BMW iX, an electric sport utility vehicle
I-X Center or International Exposition Center in Cleveland, Ohio, U.S.