Now or Never may refer to:
Songs
- "Now or Never" (Billie Holiday song) (1949)
- "Now or Never" (Yoko Ono song) (1972)
- "Now or Never" (Mark Medlock song) (2007)
- "Now or Never" (High School Musical song) (2008)
- "Now or Never" (Jodie Connor song) (2011)
- "Now or Never" (Outasight song) (2012)
- "Now or Never" (Halsey song) (2017)
- "Now or Never", a 2009 song by CNBLUE
- "Now or Never", a 2010 song by Confide from Recover
- "Now or Never", a 2001 song by Dope from Life
- "Now or Never", a 2007 song by Everlife from Everlife
- "Now or Never", a 1998 song by Godsmack from Godsmack
- "Now or Never", a 1984 song by Grim Reaper from See You in Hell
- "Now or Never", a 2006 song by Josh Groban from Awake
- "Now or Never", a 2007 song by Madina Lake from From Them, Through Us, to You
- "Now or Never", a 2010 song by M. M. Keeravani, Benny Dayal, Geetha Madhuri, Deepu from the film Vedam
- "Now or Never", a 2012 song by Kendrick Lamar featuring vocals by Blige from Good Kid, M.A.A.D City
- "Now or Never", a 2018 song by SF9
- "Now or Never", a 2003 song by Three Days Grace from the album Three Days Grace
- "Now or Never", a 2013 song by Tritonal featuring vocals by Phoebe Ryan
- "Now or Never", a 2000 song by Zebrahead from Playmate of the Year
- "Now or Never", a 2019 song by Lacuna Coil from Black Anima
- "Now or Never!", a song from the Splatoon franchise that has been covered by many fictional artists.