A Connecticut Yankee in King Arthur's Court is a 1949 American comedy musical film directed by Tay Garnett and starring Bing Crosby, Rhonda Fleming, Sir Cedric Hardwicke and William Bendix.

Based on the novel A Connecticut Yankee in King Arthur's Court (1889) by Mark Twain, the film is about a mechanic in 1912 who bumps his head and finds himself in Arthurian Britain in 528, where he is befriended by a knight and gains power by judicious use of technology. When he falls in love with the king's niece, her fiancé Sir Lancelot takes exception, and when he meddles in the politics of the kingdom, trouble ensues.

Filmed from October to December 1947, A Connecticut Yankee in King Arthur's Court was released on April 22, 1949 and distributed by Paramount Pictures. The film was a popular success and became one of the highlight films of 1949.