An informer, or informant, is a person who provides privileged information to an agency.
Informer may also refer to:
The Sub-Saharan Informer, a Pan-African weekly newspaper
Informer (newspaper), a Serbian daily
"Informer" (song), a 1992 song by Snow from 12 Inches of Snow
Common informer, a historical concept in English law abolished in 1951
The Informer (O'Flaherty novel), a 1925 novel by Liam O'Flaherty
The Informer (Takagi novel), a 1965 novel by Akimitsu Takagi
The Informers, a 1994 short story anthology
Informer Computer Terminals, a defunct computer terminal company
The Washington Informer, an African-American weekly newspaper in Washington, D.C.
Film and television
The Informer (1912 film), an American dramatic short directed by D. W. Griffith
The Informer (1929 film), a British dramatic part-talkie directed by Arthur Robison, based on the Liam O'Flaherty novel
The Informer (1935 film), an American drama by John Ford, also based on the Liam O'Flaherty novel
The Informers (1963 film), a British crime film by Ken Annakin, released in the U.S. as Underworld Informers
The Informer (TV series), a British series broadcast in 1966 and 1967 featuring Ian Hendry
The Informer (1980 film), a Hong Kong action drama from Shaw Brothers Studio
The Informers (2008 film), an American ensemble drama by Gregor Jordan, based on the Bret Easton Ellis short stories
Informer (TV series), a British series broadcast in 2018
The Informer (2019 film), an American drama by Andrea Di Stefano