Indiana Jones and the Last Crusade is a 1989 American action adventure film directed by Steven Spielberg from a screenplay by Jeffrey Boam, based on a story by George Lucas and Menno Meyjes. It is the third installment in the Indiana Jones film series and the sequel to Raiders of the Lost Ark (1981). Harrison Ford returned in the title role, while his father is portrayed by Sean Connery. Other cast members featured include Alison Doody, Denholm Elliott, Julian Glover, River Phoenix, and John Rhys-Davies. In the film, set in 1938, Indiana Jones searches for his father, a Holy Grail scholar, who has been kidnapped and held hostage by the Nazis while on a journey to find the Holy Grail.

After the criticism that Indiana Jones and the Temple of Doom (1984) received, Spielberg chose to make a more lighthearted film for the next installment, as well as bringing back several elements from Raiders of the Lost Ark. During the five years between Temple of Doom and The Last Crusade, he and executive producer Lucas reviewed several scripts before accepting Jeffrey Boam's. Filming locations included Spain, Italy, West Germany, Jordan, the United Kingdom, and the United States.

Indiana Jones and the Last Crusade was released in the United States on May 24, 1989, by Paramount Pictures. The film received positive reviews, especially for the humor, direction, musical score, story, emotional themes, and performances (particularly those of Ford and Connery), and was a financial success, earning over $474 million worldwide, making it the highest-grossing film of 1989. It also won the Academy Award for Best Sound Effects Editing and was nominated for Best Original Score and Best Sound at the 62nd Academy Awards. Although Spielberg and Lucas originally intended for The Last Crusade to be the end of the series, a sequel, Indiana Jones and the Kingdom of the Crystal Skull, followed in May 2008, while a fifth and final film, Indiana Jones and the Dial of Destiny, was released in June 2023.