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