Forbidden Island is a 1959 American adventure crime film directed by Charles B. Griffith starring Jon Hall.

A freelance frogman (Jon Hall) is hired by a psychotic treasure hunter to recover an emerald that went down in a shipwreck.

Griffith had signed with Columbia under a five-film writer-producer-director contract; he ended up only making two of them, the other being Ghost of the China Sea, which he did not direct.

[5] Photos have been found in the archives of Silver Springs State Park, Florida, indicating that some scenes were filmed there.

According to Variety "Columbia noted that Griffith seemed to be having continuing production difficulties" and sent out one of its contract directors, Fred Sears, to direct the second movie.