Cygnus is the Latin word for swan and may refer to:
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Cygnus in Wiktionary, the free dictionary.
- Cygnus 20, a Canadian sailboat design
- Cygnus (spacecraft), a space vehicle developed by Orbital Sciences Corporation and Thales Alenia Space
- Cygnus Air or Gestair Cargo, a Spanish cargo airline
- Cygnus Business Media, a U.S.-based business-to-business publishing company
- Cygnus Solutions, a company that provided commercial support for free software and the original developer of Cygwin
- Cygnus (genus), the genus of most swans
- Cygnus (mythology) or Cycnus, a number of characters in Greek mythology
- Cygnus X-1 (song series), a 1977–1978 two-part song series by Rush
- Cygnus X (music group), a trance music project
- Cygnus (spacecraft), an expendable spacecraft
- Airbus A330 MRTT KC-330 Cygnus, South Korean aerial refuelling and military transport aircraft for the Republic of Korea Air Force (ROKAF) by Airbus
- USS Cygnus, a fictional starship in The Black Hole
- Empress Cygnus, a non-player character in the game MapleStory
- Cygnus gas field, a UK North Sea gas field
- Cygnus, Colombian Folk Rock/Metal Band