Stranger on the Third Floor
- Joer: 1940
- Land: United States of America
- Genre: Mystery, Thriller
- Studio: RKO Radio Pictures
- Schlësselwuert: film noir, b movie, wrongful conviction
- Direkter: Boris Ingster
- Besetzung: Peter Lorre, John McGuire, Margaret Tallichet, Charles Waldron, Elisha Cook Jr., Charles Halton