Insidious may refer to:
*
''Insidious'' (film series), a horror film series consisting of the films listed below
**
''Insidious'' (film), a 2010 American supernatural horror film
** ''
Insidious: Chapter 2'', a 2013 sequel
** ''
Insidious: Chapter 3'', a 2015 prequel
** ''
Insidious: The Last Key'', a 2018 sequel
*
''Insidious'' (Mephisto Walz album), 2004
*
''Insidious'' (Nightrage album), 2011
{{disambiguation