The Amazing Mr. Williams
- Taon: 1939
- Bansa: United States of America
- Genre: Comedy, Mystery
- Studio: Columbia Pictures
- Keyword: detective, duty, based on play or musical, murder, fiancé fiancée relationship
- Direktor: Alexander Hall
- Cast: Melvyn Douglas, Joan Blondell, Clarence Kolb, Ruth Donnelly, Edward Brophy, Donald MacBride