Dementia 13
- Tahun: 1963
- Negara: Ireland, United States of America
- Genre: Horror, Mystery, Thriller
- Studio: The Filmgroup, Roger Corman Productions, American International Pictures
- Kata kunci: heart attack, castle, pond, will, ceremony, psychotronic, proto-slasher
- Pengarah: Francis Ford Coppola
- Pelakon: William Campbell, Luana Anders, Bart Patton, Mary Mitchel, Patrick Magee, Eithne Dunne