The Solitary Sin
- Tahun: 1919
- Negara: United States of America
- Aliran: Drama
- Studio: New Art Film Company, Solitary Sin Corporation, Public Welfare Pictures Corp.
- Kata kunci: insane asylum, hospital, masturbation, syphilis, sexually transmitted disease, venereal diseases
- Direktur: Frederick Sullivan
- Pemeran: Jack Mulhall, Helene Chadwick, Gordon Griffith, Leo Pierson, Pauline Curley, Charles Spere
