An island arc is a type of archipelago, often composed of a chain of volcanoes, with arc-shaped alignment, situated parallel and close to a boundary between two converging tectonic plates.

Island Arc (print: , online: ) is a peer-reviewed quarterly scientific journal that was established in 1992, covering "Earth Sciences of Convergent Plate Margins and Related Topics". It is published by Wiley-Blackwell on behalf of the Geological Society of Japan, in association with the Japan Association for Quaternary Research, Japan Association of Mineralogical Sciences, Palaeontological Society of Japan and the Society of Resource Geology.