I Was a Communist for the FBI is a 1951 American crime film noir produced by Bryan Foy, directed by Gordon Douglas and starring Frank Lovejoy.

The film is based on a series of stories written by Matt Cvetic that appeared in The Saturday Evening Post. The stories were later adapted into a bestselling book and a radio show starring Dana Andrews that ran for 78 episodes in 1952 and 1953.

The story follows Cvetic, who infiltrated a local Communist Party cell for nine years and reported to the Federal Bureau of Investigation on the group's activities.