The Informer (TV series), directed by Ridley Scott

Informer or Informant - member of an underground organization, a criminal gang or any other group outlawed, persecuted or harassed by the civil or military authorities, who gives the authorities information about the group as a whole and/about other members.

The Informer (1929 film), directed by Arthur Robinson

Informer (song), a song on the 1993 album 12 Inches of Snow, by Canadian singer Snow

The Informer (novel), a 1925 novel by Liam O'Flaherty

The Informer (1912 film), directed by D. W. Griffith

The Informer (film), a 1935 film directed by John Ford, written by Dudley Nichols, and starring Victor McLaglen