QX or qx may refer to:
Arts and media QX (magazine), Scandinavia QX (British magazine), England CFQX-FM, a Canadian country music radio station
Business QX Metals Quality of Experience Horizon Air (IATA airline designator: QX)
Computing Epson QX-10 and QX-16, microcomputers QX/V32c, QX/4232 and QX/4232bis, a series of modems made by Microcom Alternative name for the IBM Quantum Experience
Science q, the probability of death of a person aged x years, before reaching the age x + 1; see QX, a disease of oysters caused by the Marteilia parasite Duponol QX, otherwise known as Sodium dodecyl sulfate
Vehicles Q-type Queens car (New York City Subway car) Infiniti QX, a luxury sports utility vehicle Nissan Maxima (UK: QX), a large car built in the 1990s
Other uses QX, part of the Q3A Panel house series of prefabricated buildings QX1, QX2, etc., a series of music sequencers made by Yamaha ⟨q͡χ⟩, symbol for the voiceless uvular affricate in the International Phonetic Alphabet ⟨qx’⟩, a trigraph representing /qχʼ/ in the Taa language