A coral island is a type of island formed from coral detritus and associated organic material. They occur in tropical and sub-tropical areas, typically as part of coral reefs which have grown to cover a far larger area under the sea.

The Coral Island: A Tale of the Pacific Ocean (1858) is a novel written by Scottish author . One of the first works of juvenile fiction to feature exclusively juvenile heroes, the story relates the adventures of three boys marooned on a South Pacific island, the only survivors of a shipwreck.