Qux or variation, may refer to:
- Yauyos–Chincha Quechua, a South American language
- Quadra FNX Mining, a Canadian mining company
- Qüxü County, Tibet, China; see List of administrative divisions of the Tibet Autonomous Region
qux, a commonly defined metasyntactic variableQux(programming), a common placeholder nameQUX(radiotelegraphy), a Q-code encoding the phrase Do you have any navigational warnings or gale warnings in force?- Unicode symbol U+A40D (qux), see Yi Syllables
