CNX may refer to:
- IATA code of Chiang Mai International Airport, Thailand
- CNX (TV channel), a defunct television channel operating in Britain from 2002 to 2003
- CNX Resources, natural gas company formerly part of Consol Energy
- OpenStax CNX, an educational content repository based at Rice University
- Middle Cornish, ISO 639-3 language code cnx
- Vagus nerve, the tenth cranial nerve, abbreviated CN X
This disambiguation page lists articles associated with the title CNX.
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