Confessions of a Nazi Spy is a 1939 American spy political thriller film directed by Anatole Litvak for Warner Bros. It was the first explicitly anti-Nazi film to be produced by a major Hollywood studio, being released in May 1939, four months before the beginning of World War II in Europe, and two and a half years before the United States' official entry into the war.

The film stars Edward G. Robinson, Francis Lederer, George Sanders, Paul Lukas, and a large cast of German actors, including some who had emigrated from their country after the rise of Adolf Hitler. Many of the German actors who appeared in the film changed their names for fear of reprisals against relatives still living in Germany. Harry, Albert, and Jack Warner, who then owned Warner Bros, were Jewish.

The film's story is based on a series of articles by FBI officer Leon G. Turrou, recounting his investigation of Nazi spy rings in the United States. Parts of the film are drawn from the Rumrich spy case, the first major international espionage case in American history.