The Informer is a 1935 American drama thriller film directed and produced by John Ford, adapted by Dudley Nichols from the 1925 novel of the same title by Irish novelist Liam O'Flaherty. Set in 1922, the plot concerns the underside of the Irish War of Independence and centers on a disgraced Republican man, played by Victor McLaglen, who anonymously informs on his former comrades and spirals into guilt as his treachery becomes known. Heather Angel, Preston Foster, Margot Grahame, Wallace Ford, Una O'Connor and J. M. Kerrigan co-star. The novel had previously been adapted for a British film of the same name in 1929.

John Martin Feeney, known professionally as John Ford, was an American film director and producer. He is regarded as one of the most important and influential filmmakers during the Golden Age of Hollywood, and was one of the first American directors to be recognized as an auteur. In a career of more than 50 years, he directed over 140 films between 1917 and 1965, and received six Academy Awards including a record four wins for Best Director for The Informer (1935), The Grapes of Wrath (1940), How Green Was My Valley (1941), and The Quiet Man (1952).