Young Frankenstein is a 1974 American comedy horror film directed by Mel Brooks. The screenplay was co-written by Brooks and Gene Wilder. Wilder also starred in the lead role as the title character, a descendant of the infamous Victor Frankenstein. Peter Boyle portrayed the monster. The film co-stars Teri Garr, Cloris Leachman, Marty Feldman, Madeline Kahn, Kenneth Mars, Richard Haydn, and Gene Hackman.

The film is a parody of the classic horror film genre, in particular the various film adaptations of Mary Shelley's 1818 novel Frankenstein; or, The Modern Prometheus produced by Universal Pictures in the 1930s. Much of the lab equipment used as props was created by Kenneth Strickfaden for the 1931 film Frankenstein. To help evoke the atmosphere of the earlier films, Brooks shot the picture entirely in black and white, a rarity in the 1970s, and employed 1930s-style opening credits and scene transitions such as iris outs, wipes, and fades to black. The film also features a period score by Brooks' longtime composer John Morris.

A critical and commercial success, Young Frankenstein ranks No. 28 on Total Film magazine's readers' "List of the 50 Greatest Comedy Films of All Time", No. 56 on Bravo's list of the "100 Funniest Movies", and No. 13 on the American Film Institute's list of the 100 funniest American movies. In 2003, it was deemed "culturally, historically or aesthetically significant" by the United States National Film Preservation Board, and selected for preservation in the Library of Congress National Film Registry. It was later adapted by Brooks and Thomas Meehan as a stage musical. The film was nominated for two Academy Awards: Best Adapted Screenplay (for Wilder and Brooks) and Best Sound.

In 2014, the year of its 40th anniversary, Brooks considered it by far his finest (although not his funniest) film as a writer-director.