Crux or the Southern Cross is a constellation.
Crux may refer to:
Literature and publications
- Crux (literary), a passage whose correct reading is difficult to determine
- Crux (journal), a journal published by the Australian Student Christian Movement from 1961 to 1972
- "Crux", a poem by Patti Smith from her 1996 book The Coral Sea
- Crux (comics), 2001–2004, an American comic book published by CrossGen Entertainment
- Crux, a 2013 novel in The Nexus Trilogy by Ramez Naam
- Crux (online newspaper), a 2014 news website focusing on Catholic news
Music
- The Crux (band), a 2008 American band
- The Crux (album), 2012, by Hurt
Science and technology
- Crux (insect), a genus of cave wētā found in New Zealand
- Crux cordis or crux of the heart, an area of the heart
- CRUX, a Linux distribution
- "Crux", a theme in the 2002 GNOME 2 desktop environment
TV and videogames
- Crux, a character in the 2001 anime TV series Final Fantasy: Unlimited
- Eugene Solano, callsign Crux, Gryphus-1's air operator in the 2006 videogame Ace Combat X: Skies of Deception
- The Crux, an armed fleet in the 2020 role-playing game Genshin Impact
Other uses
- Cross (Latin: crux)
- Crux (climbing), the most difficult section of a climbing or mountaineering route
- Crux Mathematicorum, est. 1975, published by the Canadian Mathematical Society
- Yamaha Crux, a motorcycle manufactured by India Yamaha Motor
- CRUX (YouTube), an Indian online news channel owned by the Network18 Group