A castaway is a person cast adrift or ashore.
Castaway or Cast Away may also refer to:
- The Castaways (1910 film), 1910 film
- Cast Away, a 2000 film starring Tom Hanks
- Castaway (film), a 1986 film starring Amanda Donohoe and Oliver Reed, adapted from the Lucy Irvine memoir
- Castaway 2000, a BBC series
- Castaway 2007, a BBC series
- Castaways, a 1978 historical drama series featuring Annie Whittle
- Castaway (TV series), a 2011 Australian television series
- Castaways (TV series), an American reality television series produced by ABC
- The Castaway (film), a 1931 Mickey Mouse animated short
- The Castaways, an American garage rock band
- Cast Away (album), a 2004 album by Visions of Atlantis
- Cast Away, a 2013 album by Strange Talk
- "Castaway" (Zac Brown Band song), from Jekyll + Hyde
- "Castaway" (Mi-Sex song), a 1982 song by Mi-Sex
- "Castaway", a song by 5 Seconds of Summer from Sounds Good Feels Good
- "Castaway", a song by Benny Benassi from ...Phobia
- "Castaway", a song by Dog Fashion Disco from Committed to a Bright Future
- "Castaway", a song by Green Day from Warning
- "Castaway", a song by Jerry Cantrell from Degradation Trip
- "Castaway", a song by Mike Oldfield from Man on the Rocks
- "Castaway", a song by Of Mice & Men from Tether
- "Castaway", a song by Paul Van Dyk from In Between
- "Castaway", a song by Yuna from Rouge
- "Castaway", a song from In Search of the Castaways
- "Castaways" (song), a song from the children's show The Backyardigans which became a popular meme song
- "The Castaway", a song by Amorphis from Tales from the Thousand Lakes
- Castaway (opera), an opera by Lennox Berkeley