Heirisson Island is an island in the Swan River in Western Australia at the eastern end of Perth Water ( 31°57′59″S, 115°52′57″E). The city of Perth and the Town of Victoria Park are linked by The Causeway which is actually two bridges which span the two foreshores and the island. It occupies an area of roughly 285,600 square metres.

southern section including remains of previous structure

Prior to development, there were actually two islands, surrounded by mudflats. Over the years, dredging and reclamation has created a single island, which is now a landscaped nature reserve, with a two kilometre walking path. In recent years a colony of Western Grey Kangaroos have been introduced onto the island.