Mr. Sardonicus
- Sal: 1961
- Welat: United States of America
- Genre: Horror, Mystery
- Studio: William Castle Productions, Columbia Pictures
- Keyword: mask, leech, grave, castle, baron, flashback, torture, masked man, disfigured face, disfigurement, 19th century
- Serek: William Castle
- Avdan: Ronald Lewis, Audrey Dalton, Guy Rolfe, Oskar Homolka, Vladimir Sokoloff, Erika Peters