Hellcats of the Navy is a 1957 American black-and-white World War II submarine film drama from Columbia Pictures, produced by Charles H. Schneer and directed by Nathan Juran. The film stars Ronald Reagan and his wife, billed under her screen name Nancy Davis, and Arthur Franz. This was the only feature film in which the Reagans acted together, either before or after their 1952 marriage.

The film's setting is the Pacific War. The film's storyline concerns Commander Casey Abbott, skipper of the submarine USS Starfish, being ordered to retrieve a new type of Japanese mine in the waters off the Asiatic mainland. When diver Wes Barton, Abbott's rival for the affections of Nurse Lieutenant Helen Blair, gets into a life-threatening situation, Abbott must keep his personal and professional lives separate when dealing with the crisis.

The story is based on the 1955 non-fiction book Hellcats of the Sea by Vice Admiral Charles A. Lockwood and Hans Christian Adamson.