Sandsøya (Norwegian) or Sáhtiidsuolu (Northern Sami)[1] is an island in Harstad Municipality in Troms county, Norway.

The highest point on the island is the 212-metre (696 ft) mountain Veten.

[2] The island settlement is a very old trading post and church village.

There was a ferry link that formerly went between Altevik on Sandsøya, Fenes on Grytøya, and Austnes on Bjarkøya.

[2][3] There is also a connection by the Hurtigruten boat from Sandsøya to Harstad, Austnes, and Senja.