Istanbul
- År: 1957
- Land: Turkey, United States of America
- Genre: Kriminalitet, Drama, Romantik, Thriller
- Studio: Universal International Pictures
- Nøgleord: diamond, flashback, adventurer, color film noir
- Direktør: Joseph Pevney
- Cast: Errol Flynn, Cornell Borchers, John Bentley, Torin Thatcher, Leif Erickson, Peggy Knudsen