On the Waterfront is a 1954 American crime drama film, directed by Elia Kazan and written by Budd Schulberg. It stars Marlon Brando and features Karl Malden, Lee J. Cobb, Rod Steiger, Pat Henning, and Eva Marie Saint in her film debut. The musical score was composed by Leonard Bernstein. The black-and-white film was inspired by "Crime on the Waterfront" by Malcolm Johnson, a series of articles published in November–December 1948 in the New York Sun which won the 1949 Pulitzer Prize for Local Reporting, but the screenplay by Budd Schulberg is directly based on his own original story. The film focuses on union violence and corruption amongst longshoremen, while detailing widespread corruption, extortion, and racketeering on the waterfronts of Hoboken, New Jersey.

On the Waterfront was a critical and commercial success and is considered one of the greatest films ever made. It received twelve Academy Award nominations and won eight, including Best Picture, Best Actor for Brando, Best Supporting Actress for Saint, and Best Director for Kazan. In 1997, it was ranked by the American Film Institute as the eighth-greatest American movie of all time; in AFI's 2007 list, it was ranked 19th. It is Bernstein's only original film score not adapted from a stage production with songs.

In 1989, On the Waterfront was one of the first 25 films to be deemed "culturally, historically, or aesthetically significant" by the Library of Congress and selected for preservation in the United States National Film Registry.