Ringvassøya (Northern Sami:Ráneš) is a large island in Troms county, Norway. It is divided between the municipalities of Tromsø and Karlsøy. Several islands surround Ringvassøya including Kvaløya to the south; Reinøya and Karlsøya to the east; Vannøya, Helgøya, and Nordkvaløya to the north; and Rebbenesøya to the north west.