Big Fun may refer to:

• "Big Fun" (Kool & the Gang song), 1982
• "Big Fun", a song by the New Power Generation from their 1995 album Exodus
• "Big Fun", a song from the 2010 musical Heathers
• Big Fun, the U.S. version of the Inner City album Paradise
  • "Big Fun" (Inner City song), the title song
• Big Fun (Miles Davis album), 1974
• Big Fun (Shalamar album), 1979
• Big Fun (Elvin Bishop album), 1988
• Big Fun (Towa Tei album), 2009
• Big Fun (C.C. Catch album), 1988
• Big Fun (band), a 1988–1994 UK group
• Big Fun, a fictional band in the 1988 film Heathers