Mabel and Fatty's Wash Day
- taona: 1915
- Firenena: United States of America
- Genre: Comedy
- Studio: Keystone Film Company
- Keyword: silent film, one-reeler, woman director, wringer
- tale: Roscoe 'Fatty' Arbuckle
- Cast: Mabel Normand, Roscoe 'Fatty' Arbuckle, Harry McCoy, Alice Davenport, Joe Bordeaux, Edgar Kennedy