Vannøya or Vanna (Norwegian) or Várdná (Northern Sami)[1] is a rocky island in Karlsøy Municipality in Troms county, Norway.

At 232 square kilometres (90 sq mi), Vanna is the 17th largest island in Norway by area.

The highest peak is the mountain Vanntinden at a height of 1,031 metres (3,383 ft) above sea level.

Vannvåg and Vannareid are the two main population centres on the island.

There is ferry service to Karlsøya and Ringvassøya departing from the village of Skanningen on the southern tip of Vanna.