The Solitary Sin
- taona: 1919
- Firenena: United States of America
- Genre: Drama
- Studio: New Art Film Company, Solitary Sin Corporation, Public Welfare Pictures Corp.
- Keyword: insane asylum, hospital, masturbation, syphilis, sexually transmitted disease, venereal diseases
- tale: Frederick Sullivan
- Cast: Jack Mulhall, Helene Chadwick, Gordon Griffith, Leo Pierson, Pauline Curley, Charles Spere
