Dagon (Spanish: Dagon, la secta del mar, literally Dagon, the cult of the sea) is a 2001 Spanish horror film directed by Stuart Gordon and written by Dennis Paoli, based on the 1919 short story of the same name and the 1936 novella The Shadow Over Innsmouth, both by author H. P. Lovecraft. Despite Gordon, Paoli and Lovecraft all being American, it is a fully Spanish production mixing English, Galician and Spanish languages, starring Ezra Godden, Francisco Rabal and Raquel Meroño.

Based loosely on both original works (most prominently The Shadow Over Innsmouth), the film takes place in Imboca, a Spanish version of Innsmouth. It is the final film collaboration between Gordon and Paoli, who had worked together many times since the 1977 play Bleacher Bums; their previous collaborations had included the films Re-Animator (1985) and From Beyond (1986), both already based on works by Lovecraft, and their next and final collaborations on the television series Masters of Horror would include "H. P. Lovecraft's Dreams in the Witch-House" (2005), also starring Godden.

The film received positive reviews and was the final role of Rabal, who died two months before its release.