Kvamsøya is an island in the municipality of Sande in Møre og Romsdal county, Norway.

It is located 6 kilometres (3.7 mi) east of the Stad peninsula in Selje Municipality and about 7 kilometres (4.3 mi) west of the village of Larsnes on the island of Gurskøya.

There have been settlements found on the island dating back to the Bronze Age.

Kvamsøya has an area of 7.5 square kilometres (2.9 sq mi) and 231 inhabitants (2014), all of whom live along the shoreline.

There is a ferry connection from Bringsinghaug to Voksa and on to Åram (in Vanylven Municipality) and then to Larsnes.