A whistleblower is a person who exposes misconduct occurring within an organization.

Whistleblower may also refer to:

Whistle Blower (film), a 2014 Korean film Whistleblower (Irish TV series), a 2008 Irish television drama series Whistleblower (American TV program), a 2018 American true-crime television series "Whistleblower" (The Office), an episode of the American television series The Office The Whistleblower, a 2010 thriller film The Whistleblowers, a 2007 crime drama The Whistle Blower, a 1986 British spy thriller film Outlast: Whistleblower, downloadable content for the video game Outlast Whistleblower (album), a 2007 album by Finnish musician Vladislav Delay